I've never seen a vacuum tube dissected before. I academically (vaguely) know how they work but the show-and-tell makes things clearer. Thanks for taking the time and sharing.
Hi Mark, it was a new exercise for me too, I hadn't thought to have a look inside before and it does make sense when you can see the theory laid out physically in front of you 🙂
I recommend checking out glasslinger's channel... works on some of the earliest radios and makes vacuum tubes... its real neat stuff... though glasslinger is a bit eccentric.
I feel particularly fortunate to see this restoration - acute appendicitis meant the previous one was very nearly the last one I ever saw! Wonderful tonic - I look forward to watching the next part.
Hi Dave, I so happy that you made it through OK, hopefully you are on the road to recovery. I wouldn't like to think the last thing you saw was my video 😲 All the best, I hope you will see many more videos 😃
@@DavidTipton101 Many thanks Dave! I have no plans to go anywhere now and I have every intention of watching as many restorations as you feel like doing!
You know, I have been watching these videos for a few years now, and while I grew up in the vacuum tube days of the 50's and 60's, nobody ever really sat down and explained how they amplify the way you have. It is as though someone has opened the drapes and allowed the sunshine (not plentiful now in South Dakota) in. Amazing, and thanks a million. I strive to learn some new thing every day now that we are cooped up in our homes thanks to the China flu.
You gave me a good idea about marking the dial string and then tying the knoton the spring. I have seen people junking radios when the dial cord was broken.Thank you for your videos.Carl
Hi Carl, dial strings give some the heebie-jeebies but a little patience and a roll of tape will get it done. Of course I haven't tackled one of those European behemoths yet, that might be my undoing 😄
The two outer plates are beam forming electrodes. Hence the name, beam power output tube. They are tied to cathode potential and redirect the expanding cloud of electron back into the main path to the plate. Chances are very good that with the tube pulling so much current, the cathode emission (rare earth coating) material was literally stripped off by electrostatic force until the emission went down to near zero. It was amazing how well the radio worked with so little restoration yet performed. Great video, as usual.
Hi videolabguy, thank you, that's great explanation, now I know the difference between a pentode and a beam power tetrode thanks to you and others that have offered information. Most radios I do will either work or require a minor fix to get working after 70 years, that's not bad. I don't power radios with obvious faults like bad wiring or similar issues of course 😀
Another splendid video! I must say to other viewers, never take for granted the only thing needed is a video camera. David shares his skills not only in diagnostics & repair but in video editing. I can't praise this more than that. Well if I could afford to, I would throw some $$ your way. Be well and kind regards
Another nice restore David. Quite likely the high current burned the coating off the cathode. The coating make it emit more electrons and, once lost, the cathode can’t provide much at all. The darkening of the glass is due to the high level of cathode sputtering caused by the high current burning the coating off.
HI Wenlocktvdx, I was thinking along the same lines, although you would think it would register something on the tube testers. Those 6V6s are always dark, I would like to see a NOS one to see if that's how they are new, thanks for the info 👍😃
The two "screens" on the side are the beam forming plates. That tube is a beam tetrode which can be considered a variant of a pentode. Some say it was invented to perform better than a pentode, others say it was to get around the patent on the pentode.
Hi Dave, Another brilliant radio restoration project video. The Kreisler radio does resemble a beehive. It is a very attractive little radio. It goes to show, always think twice before trusting old paper, and foil capacitors. As you say, they are almost always electrically leaking - truth be known, they have been so for the past forty, to fifty years, it is know they are definitely showing their age. That is the reason, as you rightly pointed out, the audio output valve became worn out. It is a pity some technically minded person, with business acumen, has not figured out a way of steadily cutting old worn out valves open, recoating the cathode with barium oxide, re-jig the internal metal work, and recreate a vacuum whilst re-sealing the glass envelope. Let us face it, since no one is manufacturing valves for radios any more, I guess reconditioning old existing valves might be the answer. Regards, Phil.
Hi SteelCity321PB. It's nice little radio, I can't wait to see it finished. They recondition cathode-ray tubes so vacuum tubes may be a possibility. the cost would be pretty high I would imagine. There are still stocks of valves around and I have always found the ones I've needed... so far. I think the 6V6 is still being made, they use them in modern valve and guitar amps 😃
Great stuff David. Particularly like the explanation of the valve operation, and it’s dissection. Nice valve tester. I have to send mine away to a forum friend for checking. Look forward to part two.
Hi Lynton, I hope you and Co keep virus free. I hope my explanation was accurate. I get a number of comments from people why don't understand what I'm doing but enjoy the videos so I though it may help to include some explanation from time to time. I have a better valve tester than that one but it takes 10 men 10 days to work out how to use it 😄
Hi Brian, they were an amazing group. When 'Turn up your radio' came on we used to do just that and blast it through the workshops. I assume you are not from Oz 📻🙂
@@DavidTipton101 I'm from Washington DC. I collect records, and I have an interest in 60's and 70's rock and psych. I got turned onto Master's Apprentices by a fellow collector sometime 20 years ago or so. Truly fantastic band. :)
An interesting insight into valve construction. I must say I have never delved into the inner workings either. Quite an unusual looking radio, I think returning it back to it’s original colour might be worthwhile. Thanks for another interesting video.
Hi Gary, thanks. Looking at a valves insides was interesting, it helps me understand how they work. I hope the radio will look good when it's finished 🤞😃
Cracking little radio so compact and that case is so cool looking forward to seeing how it clean's up. I have a ultimate bakelite radio that looks kind of like an old 50's truck/car grill.
Hi Nick, i've been hunting for one of these for a while. It should look good when finished. You should send us a link to a photo of the 'truck front' radio 👍😃
Hi Paul, thank you, I very much enjoy your videos. Thanks for the info, I have had a number of helpful comments on their purpose, it's good to learn these things, cheers 👍😀
Hi Doc, thank you as always. It's a strange design but I think it will look good when finished. This model ran for a year or two and nothing else look like it or was carried on, I guess that makes it a bit more special. Keep safe across the ditch 👍😃
David, Thank you for the distraction from this Corvid-19 chaos we're experiencing here in the States. Illinois is shut down, no gatherings over fifty people, restaurants, stores, any public venues all closed for at least two weeks if not more. Keep bringing on the videos to help me cope with this quarantine. watching from Lincolnshire, IL USA.
Hi David, it's a devastating situation and will take a long time to recover, I hope we can keep the toll down as much as possible. The same is happening here and our PM is announcing new measures every day. I will try to keep the flow of videos coming, as you say we need distractions 👍🙂
Hi birdie399, thank you. It was a matter of divide and conquer, there was hum at the speaker and no hum/buzz when I touched the volume control, that narrows it down to the output valve area 👍🙂
I'm sure after many years this old one broke down and they marched over to Grace Bros. and got a nifty transistorized radio to replace it! How's that from a guy from the States. Excellent restore work as always! Can't wait until the big finish.
I noted when talking about the 6V6 valve, you mentioned the "two screens" connected internally to the Cathode, but you didn't know what they were for. I can tell you that the valve it's self is a Beam Tetrode, (sometimes known as a "Kinkless Tetrode"), and those "screens" are actually 'beam forming plates'. (Sometimes, wrongly called suppressor plates). The purpose of the 'beam forming plates' is to concentrate the electron stream into two densely populated electron beams flowing to the Anode. These beams intern, prevent 'secondary emission'; a flow of dislodged electrons flowing from the 'Anode' back to the 'Screen Grid' at a slower rate, and causing an undesirable 'kink' in the valves output characteristic. It was for this very reason, that the Pentode valve was invented which did the same thing (prevent secondary emission) but in a slightly different way. There was a third system :- The "Critical Distance" valve, but that method was abandoned back in the 1930's in favour of the other two systems. It is interesting to note that, the reason the Beam Tetrode was invented was to get around the patents and licence fee payable for using the Pentode design. A Court battle ensued between the inventors of the Pentode, and the Beam Tetrode, where both sides claimed Patent infringements ! Both sides lost, and the only winners were the lawyers (as usual) lol. Hope that clarifies things. I have watched parts 1 & 2 of the restoration, and you have done a fantastic job on that radio.... Looks almost 'brand new', and the cabinet has such a lovely shine on it now. It always warms my heart to see a piece of vintage equipment beautifully restored back to its original condition. Thanks for posting
Thank you for your very clear and thorough explanation of beam power valves. I have had a few others explain it too and I did some research off the back of that. Your explanation covers it all in one go, thanks 👍😀
Great! This was launched at 8 a.m. in sweden and I've got the whole day to plan for which beer and snacks will lace this fridaynight entertainment. Cheers!👍
@@ceebee23 Hello Chris! I posted a comment somewhere below here. It's all new to me (57 yrs. and no excuse) but I'll suss it out. Cheers to You all bakelite friends! Jack the ram🐏👍
Those two smaller inner plates are beam deflection plates, they are connected to the cathode because they are at the same potential electrically, and direct electrons to the plate. The 6V6 is a beam power or beam tetrode tube so it has a pair of those as opposed to a suppressor grid that a power pentode like a 6F6 or 6K6 would have.
the pipe cleaner I use all the time on contacts like tube holder It works all the time. Great work with your repair of these old radios. Love to look at your videos and learn some new stuff. To bad I live at the other side from you. Would love to meet you and see how you have it where you are. (Down under is not the word, it could be the same for me.)
Hi Harald, I have since bought some pipe cleaners 🙂 Thank you, I'm glad you enjoy my videos, we are subtropical here, not too warm and not to cold, a bit humid in summer though. as far as we are concerned, we are on top and you are downunder 😄
Excellent work David.........When I try to talk to people at work about your work on a Kriesler they think I am talking about a Chrysler.....for some reason when you say something people don't how its spellled....LOL
Thank you Skip. It's confusing and a few have mistaken it. I understand the name came from Fritz Kreisler who was an (Austrian) violinist and composer. They changed the 'E' and 'I' around to preclude any copyright issues 😃 (I hope you enjoyed your beer 🍻)
Didn't we love the Masters Apprentices, a top band. After it came on during the repair I listened to it on Google Play, times have changed but not the music 👍🙂
@@DavidTipton101 Yes, great times for music the late 50's, 60's and early 70's. I had my late Gran's Kriesler mantle radio in my bedroom. Don't know what happened to it. We had an AWA radio in the kitchen, and a big old STC radio with short wave in the lounge. Used to listen to all the serials, Dad and Dave, Hop Harrigan, Superman, Life With Dexter etc. No TV, until '63, but our neighbours had a 17 inch Deep Image AWA and I remember watching the Melbourne Olympics in 1956 on it. Your videos are very informative, although I know nothing about electronics. Its great to see them restored. I do a bit of historical research for a sporting club and on Trove, a great free resource, and came across a radio exhibition held in Melbourne in 1930?. Something like 90% of the exhibitors were Australian manufacturers. None now. They even had an exhibit of early TV! Henry Sutton of Ballarat is an interesting bloke to look up. He invented many things mechanical and electronic. He independently developed the light bulb and showed it two weeks after Edison. He also produced the first portable radio, and the one piece telephone speaker/receiver amongst many other things. Keep up the good work
I think I am a generation behind you, I was only two in 1956. I loved the Aussie bands from the 70s. In those times you could go to the pubs and hear the future big name bands before they were big. I remember Sherbert putting on a show on the side of the pathway at RMIT in Melbourne. We had TV in 61 but I loved listening to the radio after tea, curled up in a big overstuffed horsehair chair until my Mum found me. I haven't heard of Trove, I'll have a look. I've heard of Henry Sutton and read up on him. He was very clever but didn't get the recognition he deserved, he tried to run a TV through telephone wire to Ballarat if I recall. Thank for the trip down memory lane blueycarlton (I'm guessing you barrack for The Blues 🙄🙂)
Hi Uli, It was a simple fault to find. Thank you, I'm glad you enjoyed the tube explanation, I didn't know if people were interested. The case restore is underway and looks good so far 😃
@@DavidTipton101 Hello David I think it is important to know the basic knowledge, without this you will not find any mistakes . Thank you for your videos , thumbs up
Hi David just been watching you struggle with the pipe cleaner lol,i find interdental brushes from dental supplies a lot better than pipe cleaners and it really gives the contacts a good cleaning.
Hi Ray, I was just making it look difficult. I use the dental cleaners on the smaller valve bases like the Novel. I'll give them a go next time though, cheers 👍😃
I think the term used when a valve is turned on fully on the grid is called “saturation” . I’ve never seen a valve cathode completely fail from a waxie cap. Good video as always!
Hi Burnt Out Electronics, I think you are correct, thank you. As I said it may have just failed from old age, it may well have been the original 1946 valve being that it was the old shape glass. Thanks 😃
David Tipton yes it’s getting hard to find G type or coke bottle valves. now all you find are GT’s! Bit of a shame as the G valves have more character to me. Are you a member on vintage radio and tv forum? If not you should join!
The chassis looked like it was encrusted with old nicotine stains. All those Craven 'A' cork tips that someone chuffed on while listening to the races :-) Looking forward to the end result. Thank you for the electronics lesson too. Very enlightening. Cheers
Hi Pauline, It was coated in something and it didn't come off, I wash my hands after handling anything radio as they no doubt would be subjected to nicotine 😷🙂 Cheers 😃
And G'day to you mate! I will indeed enjoy the Saturday (still friday p.m.)as I put in the latest 'electronics old and new' in between and that's as great an entertainment too. Sorry about the english but I've had a few. Hälsningar från Sverige!
This one didn't seem as fighty as some (most) you've done. Makes a nice change, eh? Fascinating stuff as always, looking forward to the cabinet restoration.
Very nice you open a tube, is very interresting. Now Sao Paulo is in quarentine because virus. I will have time to fix my radios. We wait next video. Thanks. Congratulation - Sao Paulo - Brazil
Well.I can honestly say I have never seen anything like it before. The radio that is! The Beehive, it is well named. Works well though and that glass came up well. I like how you explained the valve, I wish some others would go into detail like that. Strange how the valve showed up faulty but no fault showed in the valve itself. I wonder if it was corrosion on a pin that was causing the problem, can't see it somehow. Nice video again David. Hope you and your family are all fine?
Hi Bob, thank you. It's an unusual design all right. I expected to find a defect in the valve too, I tested it three times on two testers and it was dead, I tested a good valve at the same time to insure the test was valid. It was suggested the coatings may have worn off but you would think it would still do something on test 🤔🙂
Looks like a very nice Bakelite 📻 radio, worthy of its name Beehive. Looks like a world 🌎 band model in a way. Shortwave, long wave 🌊, and medium wave, along with AM/FM. Like those capacitors, resistors and IF cans. Great radios of their time, with dial cord and glass dial face. Pretty sure it has a dial light to top it off. I’m going to guess this radio 📻 is a 1939. I don’t see it on your video, so I’m giving it a guess. Great 👍 armchair or living room radio 📻, if not both. Too nice 👍 of a radio to put it in a bedroom or garage. Friends have to see it when they come to visit. I’m new to your channel, but you sure come up with some fantastic vintage and antique radios. I’m a fan of Shango066, Radiotvphononut, and Glasslinger. All of you really have, and save nice radios 📻 from going to the landfill. So does Radio 📻 Rescue. I’m sure many more do, too. Keep the great videos coming. These radios 📻 are like Swiss watches for the house 🏡.
Hi Jeffrey, thank you. It was made in 1946-47 in Sydney Australia. It has AM and SW only, Australia didn't get FM till the 70s. When I finish the radios I add them to my collection and if possible set them up to be powered on from time to time. I like all the gentlemen you listed too, I get a lot of information and techniques from them, Cheers 😀
Great to have you back on yet another "pushover" job. But seriously I have missed your work. Was really interesting to see the valve testing machine (never seen one before). I hope that you are not being snowed under with all the Covid 19 stuff as we are here in NZ. Worrying for us older folk but you would think there was no other news and as for the insane purchasing behaviour?! Go well and be safe.
Thank you Kenneth, It was not the pushover I expected but happy to do what is needed. Covid 19 is at the forefront here as everywhere, hopefully we survive this and move on. I have stocked up on toilet tissue and have at least a two year supply. Cheers and all the best for the coming months 👍🙂
Hi Tony, thank you. Yes, get those radios out of the shed 👍 The dim bulb I did on the fly so no diagram. I do remember using double pole switches so I could switch two circuits at once, it may have been to keep the lights separate when using dim bulb or something, sorry 🤦♂️
Hi Dave; Nice radio and restore so far. You did mention the 6V6, but I am curious what the other tubes/valves are. Possibly 6A8G RF and 6B8G IF & Detector? 5Y3 rectifier? Nice explanation about the 6V6 by the way.
Hi Melissa, I've been on the lookout for quite a while, my radio scout (wife) found this and it was in good condition. I was very lucky. I think I paid $80 for it which wasn't bad 😃
Thank you Latürnich, I do need a toothbrush, I tried to use my wife's electric one but she wasn't very enthusiastic about it, I was going to rinse it off 🙄🙂
Get Glasslinger to repair that valve for you. 🙂 Another great video. The methods are thorough and that dim bulb kit is saftey minded. Do I detect ex forces Navy? Reminds me of how my dad ex subs used to go about things.
The changes were very likely due to parts shortages, at least it was in North American sets. There was a popular model of radio-phonograph made by Philco after the war called a 46-1201, famous for being promoted by Bing Crosby in their ads. Anyhow I have a Canadian version of one of these, and between the Canadian model, and the American versions, there were between 18 and 19 code numbers (revisions) on no less then three production runs, most involved changing what types of tubes (valves) were used, some used slightly different circuits in the power supply, and one used a 5'' P.M round speaker rather then the usual oval electrodynamic one. What was tricky about the code numbers is that they would switch between them at random times, you could have a code 3 made near the beginning of production, or the end, I think they designed these ahead of time based on whatever parts could be made to work depending on what was available for the cheapest price at the time.
I think you are right fritz, Immediately post war radios seemed to change components as they became unobtainable, at least Kriesler keep a record of the changes unlike other manufactures 🙂
@@DavidTipton101 I have wondered whether if there was a boom in consumer products post war, huge sales of this model gave them unprecedented feedback from servicemen. Perhaps Kriesler repeatedly tried to improve a high sales item. Shortages of parts could have been contributed to by industrial action. There were intense power struggles in Australian unions in the 40s and many strikes as a result.
@@brianh2269 Parts supply seems to be behind most of the changes as they went back and forth between the same parts, electro speaker to PM speaker and back again, valve replaced with a different type then back again, things like that. Industrial disruption may well have paid a part in consistent component supplies. There were some minor design changes but not a huge amount, a tribute to the original design.
Born in 1950, and yes. Trove has digitalized hundreds of newspapers. Because of the free trade agreement with the US, they are limited to reproducing only to 1954, for most of the papers.
Assuming that the O/P valve was faulty, with the g1 grid receiving positive voltage the likely problem was that the emissive coating on the cathode was exhausted or otherwise ruined by continued use with a very heavy plate current. The other problem I've seen with heaters is that they can be shorted and although they take current they are not heating the cathode properly. I've had several valves and CRTs with this problem.
Hi jonka1, thanks for your comment. The coating may have been exhausted but it didn't read anything on either of my testers, I would think it could produce something still. I could see the heater glow when it was tested but that may have been the reason, it may have only appeared to be working 🤔🙂
Hi D. Ilic, I get parts from everywhere. The erasers or grommets are in a kit from eBay, the globes and resistors are from the electronics shop, the capacitors from Carl the Capacitor King (link in the description) other parts, valves etc are from ebay, Facebook radio groups, radio swap meets and radio club auctions 😃
Hi, next time perhaps try increasing the heater voltage to 10 or 12 volts or even higher, the emission might come up a bit on a duff valve. Most likely the bad coupling cap made the valve draw too much current that ate the emission off the cathode in a short matter. Or the valve was spent before and the running it with the too much anode current just finished it off.
Hi Wayne, I have been looking for one of these for a while, very happy to have finally found one. We are OK so far Wayne, look after yourself as well 👍🙂
Removing the factory paint from a Beehive can be a big mistake. Some of the painted sets had non-matching colour Bakelite bits under the paint. Other common problems with Beehives are cracked louvres due to over tightening the bolts and/or missing soft washers between them and many (most?) of them end up badged as 'rielsers'.
Great video Dave! I really enjoyed it! Thanks for the simplified explanation of the output tube and what probably destroyed it. I have a couple of comments and a question....how and what did you clean the dial glass with? Comments....I saw some sort of thread lock (paint or loc-tite) on the tuning condenser nuts when you were removing them. I will try to remember that when I replace mine....Also, you are either very skilled or lucky when you put that smaller grommet inside the larger one!!!! lol.....Impressive!!! Take Care Downunder--Larry
Thank you Larry. I just use water and a tissue carefully on the printed side of the dial glass and glass cleaner on the outside. The paint on the nuts is probably just an anti-tamper indicator, Kriesler did it to all solder points and most nuts to see if someone had been in there. They also sealed the case access screws, it was a big selling point for them. The grommet idea worked pretty good 😃 Be careful yourself Larry, cheers 🙂
Possibly, but not immediately, it usually results in a dead radio that people would put into retirement long before the tube goes bad. Tubes do wear out with use as well, and that 6V6G (if they used that suffix in Australia) looked like it may have been the original with it's shouldered glass envelope.
Thanks James, I did that, I wrapped it in a small cloth and beat it with a hammer, it wouldn't break. I wrapped it in a cloth and threw it on the concrete twice before it broke, that is a tough glass 😲🙂
@@DavidTipton101 Yes, the shouldered valves can be tough nuts to crack, so to speak. I find that a centre punch will do the trick -- concentrates the hammer blow into a small area.
I've never seen a vacuum tube dissected before. I academically (vaguely) know how they work but the show-and-tell makes things clearer. Thanks for taking the time and sharing.
Hi Mark, it was a new exercise for me too, I hadn't thought to have a look inside before and it does make sense when you can see the theory laid out physically in front of you 🙂
I recommend checking out glasslinger's channel... works on some of the earliest radios and makes vacuum tubes... its real neat stuff... though glasslinger is a bit eccentric.
I feel particularly fortunate to see this restoration - acute appendicitis meant the previous one was very nearly the last one I ever saw! Wonderful tonic - I look forward to watching the next part.
Hi Dave, I so happy that you made it through OK, hopefully you are on the road to recovery. I wouldn't like to think the last thing you saw was my video 😲 All the best, I hope you will see many more videos 😃
@@DavidTipton101 Many thanks Dave! I have no plans to go anywhere now and I have every intention of watching as many restorations as you feel like doing!
@@DaveJeffery Glad to hear you're on the mend mate!
You know, I have been watching these videos for a few years now, and while I grew up in the vacuum tube days of the 50's and 60's, nobody ever really sat down and explained how they amplify the way you have. It is as though someone has opened the drapes and allowed the sunshine (not plentiful now in South Dakota) in. Amazing, and thanks a million. I strive to learn some new thing every day now that we are cooped up in our homes thanks to the China flu.
Hi Jerry, I'm so glad you got something from my quick explanation. Thanks for the feedback 👍😀
You gave me a good idea about marking the dial string and then tying the knoton the spring. I have seen people junking radios when the dial cord was broken.Thank you for your videos.Carl
Hi Carl, dial strings give some the heebie-jeebies but a little patience and a roll of tape will get it done. Of course I haven't tackled one of those European behemoths yet, that might be my undoing 😄
The problem of youtube video is that we can like the video only once despite of watching again and again...😊
Hi Manoj, thank you so much. Nice to hear from you in India. I hope you and your family are in good health 👍😃
@@DavidTipton101 everything is fine. You too take care of yourself and your family. Stay safe... thanks
The two outer plates are beam forming electrodes. Hence the name, beam power output tube. They are tied to cathode potential and redirect the expanding cloud of electron back into the main path to the plate. Chances are very good that with the tube pulling so much current, the cathode emission (rare earth coating) material was literally stripped off by electrostatic force until the emission went down to near zero. It was amazing how well the radio worked with so little restoration yet performed. Great video, as usual.
Hi videolabguy, thank you, that's great explanation, now I know the difference between a pentode and a beam power tetrode thanks to you and others that have offered information. Most radios I do will either work or require a minor fix to get working after 70 years, that's not bad. I don't power radios with obvious faults like bad wiring or similar issues of course 😀
Another splendid video! I must say to other viewers, never take for granted the only thing needed is a video camera. David shares his skills not only in diagnostics & repair but in video editing. I can't praise this more than that. Well if I could afford to, I would throw some $$ your way.
Be well and kind regards
Thank you Craig, I appreciate your comment. No need for money, I enjoy doing what I'm doing, cheers 👍😃
Another nice restore David. Quite likely the high current burned the coating off the cathode. The coating make it emit more electrons and, once lost, the cathode can’t provide much at all. The darkening of the glass is due to the high level of cathode sputtering caused by the high current burning the coating off.
HI Wenlocktvdx, I was thinking along the same lines, although you would think it would register something on the tube testers. Those 6V6s are always dark, I would like to see a NOS one to see if that's how they are new, thanks for the info 👍😃
The two "screens" on the side are the beam forming plates. That tube is a beam tetrode which can be considered a variant of a pentode. Some say it was invented to perform better than a pentode, others say it was to get around the patent on the pentode.
Hi Mister Hat, I understand that now, thanks. The end bit is interesting, I'll have to read up on it now 👍😃
Hi Dave,
Another brilliant radio restoration project video. The Kreisler radio does resemble a beehive. It is a very attractive little radio.
It goes to show, always think twice before trusting old paper, and foil capacitors. As you say, they are almost always electrically leaking - truth be known, they have been so for the past forty, to fifty years, it is know they are definitely showing their age. That is the reason, as you rightly pointed out, the audio output valve became worn out. It is a pity some technically minded person, with business acumen, has not figured out a way of steadily cutting old worn out valves open, recoating the cathode with barium oxide, re-jig the internal metal work, and recreate a vacuum whilst re-sealing the glass envelope. Let us face it, since no one is manufacturing valves for radios any more, I guess reconditioning old existing valves might be the answer.
Regards, Phil.
Hi SteelCity321PB. It's nice little radio, I can't wait to see it finished. They recondition cathode-ray tubes so vacuum tubes may be a possibility. the cost would be pretty high I would imagine. There are still stocks of valves around and I have always found the ones I've needed... so far. I think the 6V6 is still being made, they use them in modern valve and guitar amps 😃
Keep them coming David. A great escape from all the current issues in our world++++
Hi Glen, thanks, I hope I can, I won't be able to get the local supplies I need though, I'm not venturing out if I don't have too. Keep safe 👍🙂
Great stuff David. Particularly like the explanation of the valve operation, and it’s dissection. Nice valve tester. I have to send mine away to a forum friend for checking. Look forward to part two.
Hi Lynton, I hope you and Co keep virus free. I hope my explanation was accurate. I get a number of comments from people why don't understand what I'm doing but enjoy the videos so I though it may help to include some explanation from time to time. I have a better valve tester than that one but it takes 10 men 10 days to work out how to use it 😄
I noticed that your radio there was playing Master's Apprentices. Very Australian. :)
Hi Brian, they were an amazing group. When 'Turn up your radio' came on we used to do just that and blast it through the workshops. I assume you are not from Oz 📻🙂
@@DavidTipton101 I'm from Washington DC. I collect records, and I have an interest in 60's and 70's rock and psych. I got turned onto Master's Apprentices by a fellow collector sometime 20 years ago or so. Truly fantastic band. :)
@@briangoldberg4439 Ahh... thanks for the update Brian 🙂
An interesting insight into valve construction. I must say I have never delved into the inner workings either. Quite an unusual looking radio, I think returning it back to it’s original colour might be worthwhile. Thanks for another interesting video.
Hi Gary, thanks. Looking at a valves insides was interesting, it helps me understand how they work. I hope the radio will look good when it's finished 🤞😃
Cracking little radio so compact and that case is so cool looking forward to seeing how it clean's up.
I have a ultimate bakelite radio that looks kind of like an old 50's truck/car grill.
Hi Nick, i've been hunting for one of these for a while. It should look good when finished. You should send us a link to a photo of the 'truck front' radio 👍😃
@@DavidTipton101 Look up Ultimate RU radio 1947 its on the NZ vintage radio web page.
Great video David! 18:44 = Beam Forming Plates.
Hi Paul, thank you, I very much enjoy your videos. Thanks for the info, I have had a number of helpful comments on their purpose, it's good to learn these things, cheers 👍😀
buongiorno David ,la tua passione e la competenza , rende istruttivi i tuoi video , anche a chi ,come me, ha interessi in altre materie .
Good job
Buongiorno Enrico, grazie. Se ti trovi in Italia, tieni al sicuro da questo orribile virus 👍🙂
Thank you for your explanation of how the valve works. That was very cool.
Thank you Paul, I'm glad it was so well received 👍😀
Great job on explaining how the valve works David 👍
Hi Eric, thank you 👍🙂
Another master piece on its way to restored value ,Nice looking wee radio i haven't seen one like that before,Great work as always David .
Hi Doc, thank you as always. It's a strange design but I think it will look good when finished. This model ran for a year or two and nothing else look like it or was carried on, I guess that makes it a bit more special. Keep safe across the ditch 👍😃
David, Thank you for the distraction from this Corvid-19 chaos we're experiencing here in the States. Illinois is shut down, no gatherings over fifty people, restaurants, stores, any public venues all closed for at least two weeks if not more. Keep bringing on the videos to help me cope with this quarantine. watching from Lincolnshire, IL USA.
Hi David, it's a devastating situation and will take a long time to recover, I hope we can keep the toll down as much as possible. The same is happening here and our PM is announcing new measures every day. I will try to keep the flow of videos coming, as you say we need distractions 👍🙂
It took you 10 minutes into the video to get it working. Must be very pleasing to achieve such a quick result. Thanks for another interesting video.
Hi birdie399, thank you. It was a matter of divide and conquer, there was hum at the speaker and no hum/buzz when I touched the volume control, that narrows it down to the output valve area 👍🙂
Great job on the valve breakdown. Learned alot from that. Thanks David. 73 de KB7ICI.
Thank you Bill 🙂
Interesting looking radio. As always, greatly enjoyed the video.
Yes it is unusual Tom. I was looking for one for a while, thanks 🙂
Yay! New Master's David video. Off to watch right now.
Thank you Luigi Basile 😃
I'm sure after many years this old one broke down and they marched over to Grace Bros. and got a nifty transistorized radio to replace it!
How's that from a guy from the States. Excellent restore work as always! Can't wait until the big finish.
Ha-ha... that's a pretty accurate scenario HTM. Thanks, the case restore is progressing 😃
Another great video. Thank you for continuing to do what you do. It is appreciated. Stay well!
Thank you Jim it's my pleasure. I wish everyone a safe outcome to this terrible situation 👍🙂
Good evening David Sir . Another antique valve radio restoration.Great Sir awaiting for next video.Thanks Sir
Good evening Rakesh, thank you 😃
Great work as usual....thoroughly enjoyed watching you at work.
Thank you Comforter Spirit 😃
Another excellent video! Definitely appreciate the amplifier valve circuit explanation. Very interested to see what you do with the case!
Thank you ljetronic, my pleasure. The case is underway and is looking promising so far 👍🙂
Nice one Mr Tipton.
Thank you Paul 😃
Enjoyed it. Thanks. Looking forward to the cabinet....
Hi George, thanks, the cabinet is under repair now 🙂
I noted when talking about the 6V6 valve, you mentioned the "two screens" connected internally to the Cathode, but you didn't know what they were for. I can tell you that the valve it's self is a Beam Tetrode, (sometimes known as a "Kinkless Tetrode"), and those "screens" are actually 'beam forming plates'. (Sometimes, wrongly called suppressor plates).
The purpose of the 'beam forming plates' is to concentrate the electron stream into two densely populated electron beams flowing to the Anode. These beams intern, prevent 'secondary emission'; a flow of dislodged electrons flowing from the 'Anode' back to the 'Screen Grid' at a slower rate, and causing an undesirable 'kink' in the valves output characteristic.
It was for this very reason, that the Pentode valve was invented which did the same thing (prevent secondary emission) but in a slightly different way. There was a third system :- The "Critical Distance" valve, but that method was abandoned back in the 1930's in favour of the other two systems. It is interesting to note that, the reason the Beam Tetrode was invented was to get around the patents and licence fee payable for using the Pentode design. A Court battle ensued between the inventors of the Pentode, and the Beam Tetrode, where both sides claimed Patent infringements ! Both sides lost, and the only winners were the lawyers (as usual) lol. Hope that clarifies things.
I have watched parts 1 & 2 of the restoration, and you have done a fantastic job on that radio.... Looks almost 'brand new', and the cabinet has such a lovely shine on it now. It always warms my heart to see a piece of vintage equipment beautifully restored back to its original condition. Thanks for posting
Thank you for your very clear and thorough explanation of beam power valves. I have had a few others explain it too and I did some research off the back of that. Your explanation covers it all in one go, thanks 👍😀
Great! This was launched at 8 a.m. in sweden and I've got the whole day to plan for which beer and snacks will lace this fridaynight entertainment.
Cheers!👍
Thanks Jerker, I admire your enthusiasm 😄
well that is my Saturday morning sorted David!! God morgon till Sverige från Australien!
God morgon från Australien till Sverige! Njut av din lördag Chris 😃
@@DavidTipton101 Du talar svenska David ... wow Jag önskar bara att jag kunde gå och shoppa :)
@@ceebee23 Hello Chris! I posted a comment somewhere below here. It's all new to me (57 yrs. and no excuse) but I'll suss it out.
Cheers to You all bakelite friends!
Jack the ram🐏👍
Well done once again, David!
Hi David, thank you 😃
Those two smaller inner plates are beam deflection plates, they are connected to the cathode because they are at the same potential electrically, and direct electrons to the plate. The 6V6 is a beam power or beam tetrode tube so it has a pair of those as opposed to a suppressor grid that a power pentode like a 6F6 or 6K6 would have.
Thanks Fritz, I have been fully educated by other viewers kind enough to help. Thanks for helping 😀
Excellent video, clearly explained, extremely useful, thanks
Hi John, thank you 😃
Thanks David for posting another great video. I think your camera work and restorations are amazing, cheers mate.
Thanks Dave, much appreciated 😃
the pipe cleaner I use all the time on contacts like tube holder It works all the time. Great work with your repair of these old radios. Love to look at your videos and learn some new stuff. To bad I live at the other side from you. Would love to meet you and see how you have it where you are. (Down under is not the word, it could be the same for me.)
Hi Harald, I have since bought some pipe cleaners 🙂 Thank you, I'm glad you enjoy my videos, we are subtropical here, not too warm and not to cold, a bit humid in summer though. as far as we are concerned, we are on top and you are downunder 😄
Excellent work David.........When I try to talk to people at work about your work on a Kriesler they think I am talking about a Chrysler.....for some reason when you say something people don't how its spellled....LOL
Thank you Skip. It's confusing and a few have mistaken it. I understand the name came from Fritz Kreisler who was an (Austrian) violinist and composer. They changed the 'E' and 'I' around to preclude any copyright issues 😃 (I hope you enjoyed your beer 🍻)
For those who are interested, the first song heard was by The Master's Apprentices, "Because I Love You", a Top 10 hit in Australia in 1971.
Didn't we love the Masters Apprentices, a top band. After it came on during the repair I listened to it on Google Play, times have changed but not the music 👍🙂
@@DavidTipton101
Yes, great times for music the late 50's, 60's and early 70's.
I had my late Gran's Kriesler mantle radio in my bedroom. Don't know what happened to it. We had an AWA radio in the kitchen, and a big old STC radio with short wave in the lounge. Used to listen to all the serials, Dad and Dave, Hop Harrigan, Superman, Life With Dexter etc. No TV, until '63, but our neighbours had a 17 inch Deep Image AWA and I remember watching the Melbourne Olympics in 1956 on it.
Your videos are very informative, although I know nothing about electronics. Its great to see them restored.
I do a bit of historical research for a sporting club and on Trove, a great free resource, and came across a radio exhibition held in Melbourne in 1930?. Something like 90% of the exhibitors were Australian manufacturers. None now. They even had an exhibit of early TV!
Henry Sutton of Ballarat is an interesting bloke to look up. He invented many things mechanical and electronic. He independently developed the light bulb and showed it two weeks after Edison. He also produced the first portable radio, and the one piece telephone speaker/receiver amongst many other things.
Keep up the good work
I think I am a generation behind you, I was only two in 1956. I loved the Aussie bands from the 70s. In those times you could go to the pubs and hear the future big name bands before they were big. I remember Sherbert putting on a show on the side of the pathway at RMIT in Melbourne. We had TV in 61 but I loved listening to the radio after tea, curled up in a big overstuffed horsehair chair until my Mum found me. I haven't heard of Trove, I'll have a look. I've heard of Henry Sutton and read up on him. He was very clever but didn't get the recognition he deserved, he tried to run a TV through telephone wire to Ballarat if I recall. Thank for the trip down memory lane blueycarlton (I'm guessing you barrack for The Blues 🙄🙂)
Another great video from the man from Oz! Thanks My Friend!
Hi Le, thank you 👍😃
Hello David
You quickly found the mistake , nice explanation of the tube 👍
I'm looking forward to how you restore the case .
greets from Germany
Uli
Hi Uli, It was a simple fault to find. Thank you, I'm glad you enjoyed the tube explanation, I didn't know if people were interested. The case restore is underway and looks good so far 😃
@@DavidTipton101
Hello David
I think it is important to know the basic knowledge, without this you will not find any mistakes .
Thank you for your videos , thumbs up
Thank you Schraubnix, it's my pleasure 🙂
Hi David just been watching you struggle with the pipe cleaner lol,i find interdental brushes from dental supplies a lot better than pipe cleaners and it really gives the contacts a good cleaning.
Hi Ray, I was just making it look difficult. I use the dental cleaners on the smaller valve bases like the Novel. I'll give them a go next time though, cheers 👍😃
I think the term used when a valve is turned on fully on the grid is called “saturation” . I’ve never seen a valve cathode completely fail from a waxie cap. Good video as always!
Hi Burnt Out Electronics, I think you are correct, thank you. As I said it may have just failed from old age, it may well have been the original 1946 valve being that it was the old shape glass. Thanks 😃
David Tipton yes it’s getting hard to find G type or coke bottle valves. now all you find are GT’s! Bit of a shame as the G valves have more character to me. Are you a member on vintage radio and tv forum? If not you should join!
@@burntoutelectronics it's a shame the bottle valve was unserviceable. Yes I am a member of that group, they are very helpful 🙂
The chassis looked like it was encrusted with old nicotine stains. All those Craven 'A' cork tips that someone chuffed on while listening to the races :-) Looking forward to the end result. Thank you for the electronics lesson too. Very enlightening. Cheers
Hi Pauline, It was coated in something and it didn't come off, I wash my hands after handling anything radio as they no doubt would be subjected to nicotine 😷🙂 Cheers 😃
And G'day to you mate!
I will indeed enjoy the Saturday (still friday p.m.)as I put in the latest 'electronics old and new' in between and that's as great an entertainment too. Sorry about the english but I've had a few.
Hälsningar från Sverige!
G'day till Sverige! Mr Caldeira is brilliant, he knows what he is doing too. I thought your english had improved Jerker 🍻😄... cheers!
👍🐏
This one didn't seem as fighty as some (most) you've done. Makes a nice change, eh? Fascinating stuff as always, looking forward to the cabinet restoration.
Hi Paul, yep, pretty easy fix for this one thankfully. I hope to get the cabinet finished by next week 👍🙂
Very nice you open a tube, is very interresting.
Now Sao Paulo is in quarentine because virus. I will have time to fix my radios.
We wait next video. Thanks.
Congratulation - Sao Paulo - Brazil
Hi Fernando, I learned a lot from opening the tube too. I hope everything turns out OK in San Paulo 👍🙂
Well.I can honestly say I have never seen anything like it before. The radio that is! The Beehive, it is well named. Works well though and that glass came up well. I like how you explained the valve, I wish some others would go into detail like that. Strange how the valve showed up faulty but no fault showed in the valve itself. I wonder if it was corrosion on a pin that was causing the problem, can't see it somehow. Nice video again David. Hope you and your family are all fine?
Hi Bob, thank you. It's an unusual design all right. I expected to find a defect in the valve too, I tested it three times on two testers and it was dead, I tested a good valve at the same time to insure the test was valid. It was suggested the coatings may have worn off but you would think it would still do something on test 🤔🙂
@@DavidTipton101 It is a bit strange though!
Yep
excelente video. gracias. un saludo desde SANTA FE ARGENTINA
Gracias Luis de SANTA FE ARGENTINA 😀
Looks like a very nice Bakelite 📻 radio, worthy of its name Beehive. Looks like a world 🌎 band model in a way. Shortwave, long wave 🌊, and medium wave, along with AM/FM. Like those capacitors, resistors and IF cans. Great radios of their time, with dial cord and glass dial face. Pretty sure it has a dial light to top it off. I’m going to guess this radio 📻 is a 1939. I don’t see it on your video, so I’m giving it a guess. Great 👍 armchair or living room radio 📻, if not both. Too nice 👍 of a radio to put it in a bedroom or garage. Friends have to see it when they come to visit. I’m new to your channel, but you sure come up with some fantastic vintage and antique radios. I’m a fan of Shango066, Radiotvphononut, and Glasslinger. All of you really have, and save nice radios 📻 from going to the landfill. So does Radio 📻 Rescue. I’m sure many more do, too. Keep the great videos coming. These radios 📻 are like Swiss watches for the house 🏡.
Hi Jeffrey, thank you. It was made in 1946-47 in Sydney Australia. It has AM and SW only, Australia didn't get FM till the 70s. When I finish the radios I add them to my collection and if possible set them up to be powered on from time to time. I like all the gentlemen you listed too, I get a lot of information and techniques from them, Cheers 😀
Great to have you back on yet another "pushover" job. But seriously I have missed your work. Was really interesting to see the valve testing machine (never seen one before). I hope that you are not being snowed under with all the Covid 19 stuff as we are here in NZ. Worrying for us older folk but you would think there was no other news and as for the insane purchasing behaviour?! Go well and be safe.
Thank you Kenneth, It was not the pushover I expected but happy to do what is needed. Covid 19 is at the forefront here as everywhere, hopefully we survive this and move on. I have stocked up on toilet tissue and have at least a two year supply. Cheers and all the best for the coming months 👍🙂
one of the easier ones for a change, but still a good job
I like easy ones Paul, saves me wearing out my brain, cheers 😄
Somehow I missed this last week,Im just catching up!
ha-ha... thanks Robert 😄
Outstanding result, i am inspired to repair a few oldies I have in the shed, thank you. Do you have a circuit diagram for your dim bulb ?
Hi Tony, thank you. Yes, get those radios out of the shed 👍 The dim bulb I did on the fly so no diagram. I do remember using double pole switches so I could switch two circuits at once, it may have been to keep the lights separate when using dim bulb or something, sorry 🤦♂️
Hi Dave; Nice radio and restore so far. You did mention the 6V6, but I am curious what the other tubes/valves are. Possibly 6A8G RF and 6B8G IF & Detector? 5Y3 rectifier? Nice explanation about the 6V6 by the way.
Hi Daniel, thank you. It has a 6J8G converter and a 6G8G as the IF, detector and first audio amp. it is a reflex design. The rectifier is a 5Y3 👍🙂
@@DavidTipton101 thank you for your reply. 6J8g heptode - triode. 6K8 is very similar.
This kreisler radio are so cool
They are Madsen madsen, thank you 😃
Nice, l love the Kriesler Beehive Radio David, I hope to get one some day, at the right price, lol
Hi Melissa, I've been on the lookout for quite a while, my radio scout (wife) found this and it was in good condition. I was very lucky. I think I paid $80 for it which wasn't bad 😃
The two plates connected to the cathode are the beam forming plates hence the term beam pentode...
Ahh... of course, thanks Terry 🙂
So much care for this radio. Need a used toothbrush?
Nice to have another video in these boring times.
Thank you Latürnich, I do need a toothbrush, I tried to use my wife's electric one but she wasn't very enthusiastic about it, I was going to rinse it off 🙄🙂
Beautiful work on the chassis.
Hi Juhn, thank you 😀
Get Glasslinger to repair that valve for you. 🙂 Another great video. The methods are thorough and that dim bulb kit is saftey minded. Do I detect ex forces Navy? Reminds me of how my dad ex subs used to go about things.
Glasslinger could make me a new one 😃 No, no Navy, I was an aircraft engineer for 43 years 👍🙂
@@DavidTipton101 Ah that explains the patient methodology and precision.. Something I wish I had but I hope to practice on improving.
It comes with old age too William, there is no hurry anymore 🙂
The changes were very likely due to parts shortages, at least it was in North American sets. There was a popular model of radio-phonograph made by Philco after the war called a 46-1201, famous for being promoted by Bing Crosby in their ads. Anyhow I have a Canadian version of one of these, and between the Canadian model, and the American versions, there were between 18 and 19 code numbers (revisions) on no less then three production runs, most involved changing what types of tubes (valves) were used, some used slightly different circuits in the power supply, and one used a 5'' P.M round speaker rather then the usual oval electrodynamic one. What was tricky about the code numbers is that they would switch between them at random times, you could have a code 3 made near the beginning of production, or the end, I think they designed these ahead of time based on whatever parts could be made to work depending on what was available for the cheapest price at the time.
I think you are right fritz, Immediately post war radios seemed to change components as they became unobtainable, at least Kriesler keep a record of the changes unlike other manufactures 🙂
@@DavidTipton101 I have wondered whether if there was a boom in consumer products post war, huge sales of this model gave them unprecedented feedback from servicemen. Perhaps Kriesler repeatedly tried to improve a high sales item.
Shortages of parts could have been contributed to by industrial action. There were intense power struggles in Australian unions in the 40s and many strikes as a result.
@@brianh2269 Parts supply seems to be behind most of the changes as they went back and forth between the same parts, electro speaker to PM speaker and back again, valve replaced with a different type then back again, things like that. Industrial disruption may well have paid a part in consistent component supplies. There were some minor design changes but not a huge amount, a tribute to the original design.
Born in 1950, and yes. Trove has digitalized hundreds of newspapers. Because of the free trade agreement with the US, they are limited to reproducing only to 1954, for most of the papers.
Thanks blueycarlton, you could spend days in Trove 👍🙂
Assuming that the O/P valve was faulty, with the g1 grid receiving positive voltage the likely problem was that the emissive coating on the cathode was exhausted or otherwise ruined by continued use with a very heavy plate current. The other problem I've seen with heaters is that they can be shorted and although they take current they are not heating the cathode properly. I've had several valves and CRTs with this problem.
Hi jonka1, thanks for your comment. The coating may have been exhausted but it didn't read anything on either of my testers, I would think it could produce something still. I could see the heater glow when it was tested but that may have been the reason, it may have only appeared to be working 🤔🙂
@@DavidTipton101
I have known dry joints where the wires out of the valve are soldered to the base pins. Otherwise it's a mystery.
@@jonka1 I considered that and made a visual inspection of the joints and they looked good, yeah, I don't know 🤔
*_Mr David where do you buy those spare parts, such as those erasers under the variable capacitor, lamps and other spare parts needed._*
Hi D. Ilic, I get parts from everywhere. The erasers or grommets are in a kit from eBay, the globes and resistors are from the electronics shop, the capacitors from Carl the Capacitor King (link in the description) other parts, valves etc are from ebay, Facebook radio groups, radio swap meets and radio club auctions 😃
@@DavidTipton101 *_Mama Mia, it's not easy for you. It costs a lot. I admire you._*
It pays to be a scavenger for sure 😃
@@DavidTipton101 👍😅🇭🇷
what do you use to protect your phone when connecting it to valve amp volume contol? is it a capacitor if so what value?
Hi lookoutleo, yes a 0.1uF cap 👍🙂
@@DavidTipton101 meant to ask voltage?
@@lookoutleo I used one from the drawer so it would be 600 volt, it would need to be high enough to cover the expected voltages.
David are you going to paint it back to original or leave the Bakelite finish ? What ever you do I'm sure its going to be a Beauty. 73 Joe
Hi Joe, thanks. If the bakelite comes out OK I will leave it like that, it will look better than paint 👍🙂
Hi, next time perhaps try increasing the heater voltage to 10 or 12 volts or even higher, the emission might come up a bit on a duff valve. Most likely the bad coupling cap made the valve draw too much current that ate the emission off the cathode in a short matter. Or the valve was spent before and the running it with the too much anode current just finished it off.
Yes, I thought later I should have wound the voltage up, that could have well been the original valve judging but the glass envelope 👍🙂
Какой всё-таки интересный дизайн был для разных времён. Как мода.
Это очень необычно. это была единственная модель, которая выглядела так 🤔🙂
@@DavidTipton101 а я так и понял. Уш очень необычно выглядит. Я даже подобное нивидел.
Looks like a nice one. Here's hoping you and yours stay well... (or 73s to u et urs)
Hi Wayne, I have been looking for one of these for a while, very happy to have finally found one. We are OK so far Wayne, look after yourself as well 👍🙂
19:00 Could it be a deaf cathode, which is heated without emission?
That seems to be the what others think too Stefan, I couldn't have imagined it would get that bad, thanks 👍😃
Removing the factory paint from a Beehive can be a big mistake. Some of the painted sets had non-matching colour Bakelite bits under the paint. Other common problems with Beehives are cracked louvres due to over tightening the bolts and/or missing soft washers between them and many (most?) of them end up badged as 'rielsers'.
Yes, I have heard that James, luckily this one is in great condition. It was fortunate the owner had stripped it off first 😃
*DeoxIt* makes great lubricants / cleaners. Some use WD-40; *BIG* mistake!!!
Hi pi-duino, the Deoxit works very well. Yes, keep the WD-40 for door hinges 👍😃
Great video Dave! I really enjoyed it! Thanks for the simplified explanation of the output tube and what probably destroyed it. I have a couple of comments and a question....how and what did you clean the dial glass with? Comments....I saw some sort of thread lock (paint or loc-tite) on the tuning condenser nuts when you were removing them. I will try to remember that when I replace mine....Also, you are either very skilled or lucky when you put that smaller grommet inside the larger one!!!! lol.....Impressive!!! Take Care Downunder--Larry
Thank you Larry. I just use water and a tissue carefully on the printed side of the dial glass and glass cleaner on the outside. The paint on the nuts is probably just an anti-tamper indicator, Kriesler did it to all solder points and most nuts to see if someone had been in there. They also sealed the case access screws, it was a big selling point for them. The grommet idea worked pretty good 😃 Be careful yourself Larry, cheers 🙂
It is a beautiful tortoise shell Bakelite. It was a shame it was painted enamel white.
It will come up beautiful again I hope Geoff 😃
Haloo may frand david you are vary good and thes video. ... Abdul. Iraq
Hello Abdul, thank you 😀
tube will red plate if it has no bias 6V6 has a plate dissipation max of 12 watts
Yes, I didn't want to run it too long with the new valve and the dud coupling cap 👍😀
Maybe the tube lost vacuum, partially or completely. Electrons need a free path devoid of air molecules!
Hi Linus, this video was done some time ago so I'm not sure to what you are referring but what you say is quite possible 🙂
@@DavidTipton101 Sorry, you did a post-mortem on the dead 6V6 but didn't find anything electrically amiss.
@@linuspoindexter106 I remember now, the consensus from some viewers was the the coating on the cathode had worn away.
Sweet Marsha lol,
It doesn't quite have the same ring to it as Caroline 🤔😃
@@DavidTipton101 no not really lol
The valve was killed by the leaky capacitor, causing it to, overload
Hi Ideal1980, exactly 👍😀
Possibly, but not immediately, it usually results in a dead radio that people would put into retirement long before the tube goes bad. Tubes do wear out with use as well, and that 6V6G (if they used that suffix in Australia) looked like it may have been the original with it's shouldered glass envelope.
Rather than toss valves on the ground 😮 , a better method is to put them in an old towel and tap them with a hammer.
Thanks James, I did that, I wrapped it in a small cloth and beat it with a hammer, it wouldn't break. I wrapped it in a cloth and threw it on the concrete twice before it broke, that is a tough glass 😲🙂
@@DavidTipton101 Yes, the shouldered valves can be tough nuts to crack, so to speak. I find that a centre punch will do the trick -- concentrates the hammer blow into a small area.
@@James_Bowie I made an automatic centre punch as an apprentice, I should have dragged that out 😃
what a buzz of a video
Thank you Ian. I was hoping to pick up a Bee Gees song 😄
First 😉👍🏻
Well done Paul-Ivo B 🏆😄