This radio is made by Shirasuna Denki or later on Shin-Shirasuna as noted on the label inside. The name "Silver" on one of the IF cans is a trade name of Shin Shirasuna. Shin Shirasuna built a lot of stereo gear for Harman/Kardon in the 70's and 80's and many radios under the Wards Airline brand.
Excellent, underrated Japanese brand. Even as late as the 1980's they were producing consistently good quality inexpensive radios with surprisingly nice features. My teenage years radio was a Silver XF-1900 multi band with 9 bands and digital frequency display, a great feature at the price point it sold for. Cheers!
hi shango, the rotary switch is a power saver. in EAR the output tube is disabled and the earphone connects to the 1U5. In LOW only half of the 3S4 filament is used to conserve power, in HIGH all filaments are used, which of course runs the A battery down in a short time. These radios were really only practical when used with the earphone. I have several sets very much like the one you have here. They are quite unique, that's for sure!
After 35+ years in the hobby, one thing I've learned is that sometimes you have to settle for 'good enough'. It's not like we can run down to the local parts house and find an exact replacement for things like failed coils, sometimes we have to improvise. I feel like this one is good enough
I'm happy to hear that you're helping out a young collector. As an electronics enthusiast, I remember how valuable were the conversations with experienced techs or engineers for me. Fast forward a few years, I'm an electronics engineer working in the semiconductors industry.
I love those old 'portable' tube radios! After eating up dozens of batteries, I built a power supply to keep from spending all my allowance on new batteries, I could listen to the old tube sets I salvaged from the trash in the late 60s and early 70s. And when the transistor sets became available, the batteries lasted longer, or so it seemed if I remembered to turn them off, I could carry them around and listen to them. But when I started driving, portable radios became less important, and car audio took its place! Today, unfortunately, old tube sets are not as easy to find and fix, but the transistor radios, and the last one I repaired was a Zenith Transoceanic 3000, are still available.
Let's all press play a 2nd time when we leave the house or whatever for this man's videos.. nobody knows you're out. Get those view numbers up we get more wonderful content!
Hi shango. Im a transistor radio guy,but ive collected a few tube portables over the years. Never heard one play until now. Its a continental 4tube acdc. No powercord so made up battery pak of 7 9volts,with one weak one for around 69volts total. Had one bad tube a friend af mine tested.was the audio output, a 3s4. Got one from ebay. Works great!😊
Fujitsu Ten was indeed an OEM for Toyota, as an example, they made single digit percent of Toyota ECU's, with of course 98%+ being made by Toyota's own NipponDenso
2:20 The radio was manufactured by Shin Shirasuna Denki Co., which typically sold its radios (both tube and transistors) under the brand name Silver (not to be confused with Silvertone). 11:34 You can see the name Silver stamped on the first IF can.
I recently lost my "this is a test" station. Mine was on 530, a 6 watt travel information station (TIS) that aired info for a stretch of highway that is used for pavement testing. Located some 30 miles away from me. It went off on the first of this year and I haven't seen it since. The FCC license still shows active.
I feel like such a fool that I didn’t know you were on Rumble. Now I’m feeling foolish for not understanding the Crusebot reference. Will have to go back through your uploads and hopefully there will be some rumble only content someday so we can all get away from the YT overlords. Love your content keep up the great work.
The 6-dot capacitor code works as follows. Reading left to right in the direction of the arrow, the meanings of the top row of dots are: type, 1st digit, 2nd digit. The meanings of the bottom row of dots reading left to right are: characteristic or class, tolerance, multiplier. I have tried to include a link to a handy table of these parameters but, it appears that my comments are deleted immediately if my comment contains a web address. If you want to see the table, please let me know how to communicate the web address.
I hate working on battery portables . So fragile and critical . They always take me much longer than the mains sets . I don't have as much patience as you !!! Fascinating video .
The wires cross inside the connector as a strain relief. It does make you double check. Edit; you discovered it.. premature comment story of my life. Enjoy your work very much.
I always laugh when Shango utters the phrase, "...no way I'm gonna be able to .." and in the next cut he is engaged in the very action he just declared impossible. I did notice your posts on Rumble a while back.
The air-cored osc coil was very likely connected with the wrong phase, and that's why it did not work. Reversing one of the winding connections would have fixed the problem. About the the "high" and "low" power switch settings: in the "low" position only one half of the 3S4 filament is used, lowering battery consumption at the expense of some output power; in the "high" position both halves are used. The "ear" position totally disconnects the 3S4 filament, with the earphone being connected to the 1S5 plate.
It was looking grim for a bit and I thought maybe this one wasn't going to make it. Then I checked the run time on the video and sure enough there was enough time and it got to see daylight once again. Nice troubleshooting.
The Tiny SA spectrum analyser/signal generator is proving to be very useful.. Wonder what the date is for the radio.. Presumably around 1954 to 56,just before the transistor era kicked in.
Could you chemically dissolve the coating off what's left of the broken oscillator coil lead so that it could be soldered back into place? Doing this with a solvent would prevent damaging the wire any further and might enable a successful repair using the original oscillator coil.
Strange it would be made to look like the red and black wires are on the opposite sides. If I'm not looking at it wrong. I would have connected the + on the side with the red wire showing, and the opposite for negative. Good thing you went with your knowledge. Very interesting radio. I like the name of it. It was somebody's pal.
I had the same problem with Rumble, they pulled over a bunch of videos but then that got stopped. I had somebody at Rumble helping me migrate videos over there, they said they were putting me on a priority list blah blah blah but you don't get hardly any views over there is the main issue. Rumble doesn't suggest videos to anybody so if they don't know you're there, they never find any of your stuff! Great video as always, Shango, I always wondered if those oscillators could be replaced....
Learned something NEW today. I have several RCA tube books, like the RC-30, but I only open them up to look at specific tubes... Then you showed the radio schematic near the back of the book??? So I grabbed my RC-18 older tube manual and their it was, same schematic as you were showing... Thanks for another interesting tip... BUT!!! I still do not wear rubber gloves on my hands!!! 🙂
Dan has explained in the past that he wears gloves because many of the TV's, radios, etc., that he works on often comes from storage areas, including the trash, and often contains rat feces and other undesirable substances. So, to protect himself against germs and potential sickness and/or disease, he chooses to wear gloves.
One of those red core IF cans from a transistor radio (the osc coil) might actually work in that radio, the tuning caps might be almost the same values in a typical transistor radio and that set. Putting a .01 uf cap between the hot end of the osci coil and the tuning cap will allow the circuit to work but keep B+ off the variable cap.
"The Ten in the company's name does not refer to the number 10, but rather comes from the Chinese character Ten (天), meaning heaven in Chinese and Japanese."
The brown plastic domino cap is 5000pF ( .005uF) if that is a green dot ( 5) then black ( 0) then red (x100) i.e. 50 x1000. That is a +/-10% tolerance plastic covered paper ( white left dot) cap. It is crap now like the coil. Owner should get a good replacement coil with an iron core. At least you have a source for the schematic.Thanks for the resurrection Shango.
TEN branded tubes and radios were made in Kobe at the Kawanishi Machinery factory by what was originally the Kawanishi Machinery company. Like many companies of the time Kawanishi supplied aircraft parts and similar for the military, releasing the TEN tubes in the mid 40s.. the company had grown quite diverse and split its various operations into several individual companies by the late 40s. The new name for the company that built the tubes was called Kobe Construction (if I remember correctly) which was later acquired by Fujitsu and rebranded Fujitsu TEN up until quite recently when they were bought out by Denso so the company now goes by Denso TEN. Still going to this day under the Denso brand but long stopped manufacturing vacuum tubes.
Shano066, I found a couple of radios yesterday for my channel, and I guess I stepped into the Twilight Zone because one of those radios was this one.Not trying to copy you.
good that you've said about checking coils and not assuming recapping will cure everything, many say 'first thing is to recap, no, i've always said check all major 'unobtanium' parts before even thinking of recapping, or you'll just be wasting time and money..,
Shango I really like your Solid state Tube idea. I have a thought you could add a Orange LED for the tubes you can see the filament glow . but for the space charge tubes u could add a IR led and you would see it in your camera. Very cool Idea. I just got a 4A-1B 'Starlet' Radio Garod Radio Corp. 4 tube and the b+ works on 67.5 volts. to restore. thank you for the tips.
I was just looking at an online tank circuit calculator. If the oscillator half of the tuning condenser (while fully closed) measures 200 pf, it looks like the coil would have to be right at about 140 micro henrys. That is figuring 995 as the target frequency. (540 for the lowest AM station + 455 because the oscillator rides higher.) Please check out that online tank circuit calculator if you have time. It's quite interesting. Thanks for another cool video!
The tuning capacitor maximum pf range is different, for different AM radios, so chances of substituting an oscillator from another radio will be ether too low or too high in frequency to headerdine properly to 455 khz IF.
If you know the approximate frequency the oscillator should run at and you know the capacitor value, 1/6.28*(square root)[L*C] = frequency. You can solve for what the coil should be and use and find one that has the right value. You probably know that but FYI
Awesome fix! You can try making an Osc coil by making up a sewing machine bobbin with (or a phenolic tube spun on a drill bit), let’s say, 2 windings of #30 awg wire .. number of turns/ uH and dc resistance, is trial and error .. prob how RCA did it.
Try turpentine or gasoline (on a Q-tip) to dissolve the shellac. It shouldn’t do anything to the coil form, but it might do something to the enameled wire, though I doubt it. Maybe the heat of a soldering iron will just melt the shellac off the end of the wire. 🤔 Sad, I like those little battery-powered tube radios, but good luck finding a replacement oscillator coil that small. 😢 I guess you might be able to wire in one from an AA5 set just to test the local oscillator.
Very well done Sir! I think that I might have tried putting a bit of Ferrite into the big Oscillator Coil to tune it down a bit. I wonder how much listening you got with these Radios per set of Batteries?
these pimply kid radios were often pink or green. they ate filament batteries in about an hour and a half in the days of carbon batteries. The tubes are plenty rugged. Perfectly good radios but impractical as portables with the carbon-zinc batteries... with alkalines they would run for a day maybe. the 45 v batteries lasted pretty well. But these things were expensive to run.. despite being cheap to buy.
Be sure the young guy understands phasing of an osc coil. There's 50/50 chance he'll hafta flip polarity of either winding. Also B+ on the tuning cap stator = BAAAAD if the plates were to short even momentarily.
Maybe the first replacement coil would work with reversed wires on one side. There are more ways how to built oscilator, but you always need positive feedback loop.
One thing that you could've done to slow the oscillator down was to put another capacitor across the coil (where c4 and c5 are) and that would help slow the oscillator down. C4 and C5 across the T1 coil forms whats called a "tank circuit" and the frequency can be calculated using "f = 1/(2*pi*SQRT(L * C))".
I would like to get one of those Tiny SA spectrum analyzer/ signal generator but there are so many copies now I'm afraid to order a dud. Do you know a good souce please? I live in Asia and would likely order it from China. Thanks.
Apart from the simplicity of manufacturing, I don't get why do we still stick to color coding resistors. In USSR (МЛТ resistors), Poland (Telpod,Omig), East Germany (RFT) there were plenty of resistors which just had the value written on it. Even the small 1/8W МЛТ resistors had a value just written on them. Color fading or just plain weak/inconclusive straight from the factory is why I hate color coding.
It was NOT uncommon to see wrong colors on early JA radios. Once in the early 70's I ordered 25 9 V connectors & they were reversed ! Always confirm ! LFOD !
“Don’t be throwing no shade, I just want to get paid.” ROTFL 🤣 Haven’t heard that one before. I’m sure someone (me) will come up with, “never mind her boobs, I just want my tubes.” 😂 End moment of shameless self-promotion; back to our regularly scheduled program.
A young person interested in radio could watch this video over and over trying to understand everything that happens - rich in fundamentals.
Yes, agree. There's way too much to absorb in one viewing. Even as a veteran radio/tv guy, i find myself watching Shango's old videos over and over.
I love my Saturday morning resurrection videos.
This radio is made by Shirasuna Denki or later on Shin-Shirasuna as noted on the label inside. The name "Silver" on one of the IF cans is a trade name of Shin Shirasuna. Shin Shirasuna built a lot of stereo gear for Harman/Kardon in the 70's and 80's and many radios under the Wards Airline brand.
Excellent, underrated Japanese brand. Even as late as the 1980's they were producing consistently good quality inexpensive radios with surprisingly nice features. My teenage years radio was a Silver XF-1900 multi band with 9 bands and digital frequency display, a great feature at the price point it sold for. Cheers!
You're going to make me more of a hoarder than I already am, now I have to save all the Oscillator Coils I run across!!!!!!
White dot in the upper left indicates’paper’.
If it's the old style color codes then White is EIA Mica, Black would be JAN Mica and Silver would be moulded paper...
hi shango, the rotary switch is a power saver. in EAR the output tube is disabled and the earphone connects to the 1U5. In LOW only half of the 3S4 filament is used to conserve power, in HIGH all filaments are used, which of course runs the A battery down in a short time. These radios were really only practical when used with the earphone. I have several sets very much like the one you have here. They are quite unique, that's for sure!
After 35+ years in the hobby, one thing I've learned is that sometimes you have to settle for 'good enough'. It's not like we can run down to the local parts house and find an exact replacement for things like failed coils, sometimes we have to improvise. I feel like this one is good enough
I agree with you 100% about being good enough.
I'm happy to hear that you're helping out a young collector. As an electronics enthusiast, I remember how valuable were the conversations with experienced techs or engineers for me. Fast forward a few years, I'm an electronics engineer working in the semiconductors industry.
I love those old 'portable' tube radios!
After eating up dozens of batteries, I built a power supply to keep from spending all my allowance on new batteries, I could listen to the old tube sets I salvaged from the trash in the late 60s and early 70s.
And when the transistor sets became available, the batteries lasted longer, or so it seemed if I remembered to turn them off, I could carry them around and listen to them.
But when I started driving, portable radios became less important, and car audio took its place!
Today, unfortunately, old tube sets are not as easy to find and fix, but the transistor radios, and the last one I repaired was a Zenith Transoceanic 3000, are still available.
Let's all press play a 2nd time when we leave the house or whatever for this man's videos.. nobody knows you're out. Get those view numbers up we get more wonderful content!
Hi shango. Im a transistor radio guy,but ive collected a few tube portables over the years. Never heard one play until now. Its a continental 4tube acdc. No powercord so made up battery pak of 7 9volts,with one weak one for around 69volts total. Had one bad tube a friend af mine tested.was the audio output, a 3s4. Got one from ebay. Works great!😊
I have been subscribed to you since 2020 the COVID 19 lockdown all of your videos are very interesting
Saturday morning Shango vids along with bacon and eggs.
It's the only way to fly
I like to watch after the bacon and eggs. I get great naps in, then rewind to see what he did to fix.
I enjoyed diagnosing this with you.
(I'm quite pleased with the amount of work I had to put in.)
Mr Shango, your videos are very good, there is always something new to learn.
Fujitsu Ten was indeed an OEM for Toyota, as an example, they made single digit percent of Toyota ECU's, with of course 98%+ being made by Toyota's own NipponDenso
Nearly fell for the same battery terminal issue in an old RCA. Glad you are helping a new collector continue an interest in the hobby.
*True, back in the 1970s I remember seeing the name "TEN" on most radios inside of Toyotas sold*
2:20 The radio was manufactured by Shin Shirasuna Denki Co., which typically sold its radios (both tube and transistors) under the brand name Silver (not to be confused with Silvertone). 11:34 You can see the name Silver stamped on the first IF can.
Great brand which was often overshadowed by the Japanese big guns of the time: Sony, Matsushita, Toshiba, Sanyo, etc..
I recently lost my "this is a test" station. Mine was on 530, a 6 watt travel information station (TIS) that aired info for a stretch of highway that is used for pavement testing. Located some 30 miles away from me. It went off on the first of this year and I haven't seen it since. The FCC license still shows active.
And again and again the "blue gloved" devil strikes! Love it, love it! Great stuff.
I feel like such a fool that I didn’t know you were on Rumble. Now I’m feeling foolish for not understanding the Crusebot reference. Will have to go back through your uploads and hopefully there will be some rumble only content someday so we can all get away from the YT overlords. Love your content keep up the great work.
Neat! I never thought that coil would work, wouldn’t even have tried it. Love these videos!
Wow, that’s some lot of diagnostics crazy how much voltage that thing takes Good job getting a going You got down to the bottom of it
The 6-dot capacitor code works as follows. Reading left to right in the direction of the arrow, the meanings of the top row of dots are: type, 1st digit, 2nd digit. The meanings of the bottom row of dots reading left to right are: characteristic or class, tolerance, multiplier.
I have tried to include a link to a handy table of these parameters but, it appears that my comments are deleted immediately if my comment contains a web address. If you want to see the table, please let me know how to communicate the web address.
I hate working on battery portables . So fragile and critical . They always take me much longer than the mains sets .
I don't have as much patience as you !!!
Fascinating video .
The wires cross inside the connector as a strain relief. It does make you double check. Edit; you discovered it.. premature comment story of my life. Enjoy your work very much.
I always laugh when Shango utters the phrase, "...no way I'm gonna be able to .." and in the next cut he is engaged in the very action he just declared impossible. I did notice your posts on Rumble a while back.
"Isn't this fun"
Yes, yes it is! 👍
your small pocket radio repairs are among my favorite things you do . thanks for the humor , expertise and great editing ! you rock the casbah!
The air-cored osc coil was very likely connected with the wrong phase, and that's why it did not work. Reversing one of the winding connections would have fixed the problem.
About the the "high" and "low" power switch settings: in the "low" position only one half of the 3S4 filament is used, lowering battery consumption at the expense of some output power; in the "high" position both halves are used. The "ear" position totally disconnects the 3S4 filament, with the earphone being connected to the 1S5 plate.
i did
Nice to go back in time on this light power unit sort of stop gap unit ❤
I love the humor. ❤
Sears used to fix anything unless your warntany was not expired but it is the facts how to fix vintage stuff and love that one too-DLH
Love these videos Shango.. always watch start to end. Thanks!
As entertaining as usual, Shango, I do enjoy your videos for their technical value too.
It was looking grim for a bit and I thought maybe this one wasn't going to make it. Then I checked the run time on the video and sure enough there was enough time and it got to see daylight once again. Nice troubleshooting.
It was good to fix the speaker cone by using something like rubber adhesive, anyway very good repairing
The Tiny SA spectrum analyser/signal generator is proving to be very useful.. Wonder what the date is for the radio.. Presumably around 1954 to 56,just before the transistor era kicked in.
Could you chemically dissolve the coating off what's left of the broken oscillator coil lead so that it could be soldered back into place? Doing this with a solvent would prevent damaging the wire any further and might enable a successful repair using the original oscillator coil.
Strange it would be made to look like the red and black wires are on the opposite sides. If I'm not looking at it wrong. I would have connected the + on the side with the red wire showing, and the opposite for negative. Good thing you went with your knowledge. Very interesting radio. I like the name of it. It was somebody's pal.
I had the same problem with Rumble, they pulled over a bunch of videos but then that got stopped. I had somebody at Rumble helping me migrate videos over there, they said they were putting me on a priority list blah blah blah but you don't get hardly any views over there is the main issue. Rumble doesn't suggest videos to anybody so if they don't know you're there, they never find any of your stuff! Great video as always, Shango, I always wondered if those oscillators could be replaced....
Learned something NEW today. I have several RCA tube books, like the RC-30, but I only open them up to look at specific tubes... Then you showed the radio schematic near the back of the book??? So I grabbed my RC-18 older tube manual and their it was, same schematic as you were showing... Thanks for another interesting tip... BUT!!! I still do not wear rubber gloves on my hands!!! 🙂
Dan has explained in the past that he wears gloves because many of the TV's, radios, etc., that he works on often comes from storage areas, including the trash, and often contains rat feces and other undesirable substances. So, to protect himself against germs and potential sickness and/or disease, he chooses to wear gloves.
Bravo, mister~!
One of those red core IF cans from a transistor radio (the osc coil) might actually work in that radio, the tuning caps might be almost the same values in a typical transistor radio and that set.
Putting a .01 uf cap between the hot end of the osci coil and the tuning cap will allow the circuit to work but keep B+ off the variable cap.
"The Ten in the company's name does not refer to the number 10, but rather comes from the Chinese character Ten (天), meaning heaven in Chinese and Japanese."
The brown plastic domino cap is 5000pF ( .005uF) if that is a green dot ( 5) then black ( 0) then red (x100) i.e. 50 x1000.
That is a +/-10% tolerance plastic covered paper ( white left dot) cap. It is crap now like the coil. Owner should get a good
replacement coil with an iron core. At least you have a source for the schematic.Thanks for the resurrection Shango.
It is Fujitsu Ten.
TEN branded tubes and radios were made in Kobe at the Kawanishi Machinery factory by what was originally the Kawanishi Machinery company.
Like many companies of the time Kawanishi supplied aircraft parts and similar for the military, releasing the TEN tubes in the mid 40s.. the company had grown quite diverse and split its various operations into several individual companies by the late 40s.
The new name for the company that built the tubes was called Kobe Construction (if I remember correctly) which was later acquired by Fujitsu and rebranded Fujitsu TEN up until quite recently when they were bought out by Denso so the company now goes by Denso TEN.
Still going to this day under the Denso brand but long stopped manufacturing vacuum tubes.
The sensitivity on that thing is hotter than a pocket full of 9 volt batteries!
That's a cute little radio. Test Lady is my favorite station. xD
I cut that clip from another of his videos and made it my ring tone on my pine phone for quite awhile.
Ha! I bet that got some run reactions when your phone rang. Nice choice.
Shano066, I found a couple of radios yesterday for my channel, and I guess I stepped into the Twilight Zone because one of those radios was this one.Not trying to copy you.
good that you've said about checking coils and not assuming recapping will cure everything, many say 'first thing is to recap, no, i've always said check all major 'unobtanium' parts before even thinking of recapping, or you'll just be wasting time and money..,
Shango I really like your Solid state Tube idea. I have a thought you could add a Orange LED for the tubes you can see the filament glow . but for the space charge tubes u could add a IR led and you would see it in your camera. Very cool Idea. I just got a 4A-1B 'Starlet' Radio Garod Radio Corp. 4 tube and the b+ works on 67.5 volts. to restore. thank you for the tips.
I was just looking at an online tank circuit calculator. If the oscillator half of the tuning condenser (while fully closed) measures 200 pf, it looks like the coil would have to be right at about 140 micro henrys. That is figuring 995 as the target frequency. (540 for the lowest AM station + 455 because the oscillator rides higher.) Please check out that online tank circuit calculator if you have time. It's quite interesting. Thanks for another cool video!
The tuning capacitor maximum pf range is different, for different AM radios, so chances of substituting an oscillator from another radio will be ether too low or too high in frequency to headerdine properly to 455 khz IF.
If you know the approximate frequency the oscillator should run at and you know the capacitor value, 1/6.28*(square root)[L*C] = frequency. You can solve for what the coil should be and use and find one that has the right value. You probably know that but FYI
didn't know you were on rumble, subbed there as well
Awesome fix!
You can try making an Osc coil by making up a sewing machine bobbin with (or a phenolic tube spun on a drill bit), let’s say, 2 windings of #30 awg wire .. number of turns/ uH and dc resistance, is trial and error .. prob how RCA did it.
the later lower current 25mA filament valves/tubes are even more delicate, very easy to pop them, been there done it 😢
Nice radio
Try turpentine or gasoline (on a Q-tip) to dissolve the shellac. It shouldn’t do anything to the coil form, but it might do something to the enameled wire, though I doubt it. Maybe the heat of a soldering iron will just melt the shellac off the end of the wire. 🤔 Sad, I like those little battery-powered tube radios, but good luck finding a replacement oscillator coil that small. 😢 I guess you might be able to wire in one from an AA5 set just to test the local oscillator.
Great video as usual but that speaker cone glue has an unfortunate appearance....
Very well done Sir!
I think that I might have tried putting a bit of Ferrite into the big Oscillator Coil to tune it down a bit.
I wonder how much listening you got with these Radios per set of Batteries?
these pimply kid radios were often pink or green. they ate filament batteries in about an hour and a half in the days of carbon batteries. The tubes are plenty rugged. Perfectly good radios but impractical as portables with the carbon-zinc batteries... with alkalines they would run for a day maybe. the 45 v batteries lasted pretty well. But these things were expensive to run.. despite being cheap to buy.
There's abad solder connection at 55:43
LOL
Lmao
back to reality
Why for the life of me would anyone want own a tube portable radio! Thats insane! Good Grief!
People actually collect them like ex wives!
At the end there sounded like Marge Simpsons smoking sister...cheers.
Be sure the young guy understands phasing of an osc coil. There's 50/50 chance he'll hafta flip polarity of either winding. Also B+ on the tuning cap stator = BAAAAD if the plates were to short even momentarily.
This is a test always reminds me of gladOS from the portal games
Maybe the first replacement coil would work with reversed wires on one side. There are more ways how to built oscilator, but you always need positive feedback loop.
One thing that you could've done to slow the oscillator down was to put another capacitor across the coil (where c4 and c5 are) and that would help slow the oscillator down. C4 and C5 across the T1 coil forms whats called a "tank circuit" and the frequency can be calculated using "f = 1/(2*pi*SQRT(L * C))".
That would work, but it would have reduced the tuning range.
Isn't Cal Trans on 1700 kHz like most traffic stations are? They use 1650-1700 kHz here for traffic info etc.
Dont worry buddy, I dont trust colors all the time. You live and learn.
I have a old Windsor transistor radio volume problem adjusting it does nothing
Doesn’t the same voltage on the grid and plate indicate the tube is not in conduction?
old man baker McComb Ohio. Had a stock room with a dozen in a corner. The auction went fast.
Is that harmonic 455KHz away from the main peak?
46:06 ❤
I would like to get one of those Tiny SA spectrum analyzer/ signal generator but there are so many copies now I'm afraid to order a dud. Do you know a good souce please? I live in Asia and would likely order it from China. Thanks.
go to their website for that information
Surprised JJ Cruz hasn't asked you to interview , this is a test lady.
Who the heck is this "JJ Cruz" that keeps being referenced? It's a running joke here but I have no idea who that is.
WHAT MADE MY OSCILLATOR NOT RUN TURNED OUT BEING A BAD PAIR OF RUNNING SHOES!
27:14 A modern day reference to honor todays anniversary (Feb 3rd) of losing Buddy Holly, The Big Bopper, and Richie Valens.
Is R1 Blue Green Yellow Silver?
Hello Shango066, how do I submit a radio for repair?
Apart from the simplicity of manufacturing, I don't get why do we still stick to color coding resistors.
In USSR (МЛТ resistors), Poland (Telpod,Omig), East Germany (RFT) there were plenty of resistors which just had the value written on it. Even the small 1/8W МЛТ resistors had a value just written on them. Color fading or just plain weak/inconclusive straight from the factory is why I hate color coding.
Somebody please explain the fairly frequent “Jason JJ Crews” references to me. I’ve looked and can’t find anything. 😂😂😂
Yeah,I asked about that too. Have no idea who it is and nothing came up on Google. It must be an "inside" joke.
Most likely it's a capacitor after you turned it on I knew right away it was a capacitor most likely it needs all the capacitors replaced😅😅😅😅😅😅😅😅
pity you're not in the uk or i'd say send the coil to me and i'd try to repair it
16:44 Hello
Spaghetti I had for short protection. Is hard to get.
Have you tried AM 1470 yet?
what is it?
look at a battery to understand connector polarity !
Is Ten related to Tenna
It was NOT uncommon to see wrong colors on early JA radios. Once in the early
70's I ordered 25 9 V connectors & they were reversed ! Always confirm !
LFOD !
JOHNNY 5 ALIVE
“Don’t be throwing no shade, I just want to get paid.” ROTFL 🤣 Haven’t heard that one before. I’m sure someone (me) will come up with, “never mind her boobs, I just want my tubes.” 😂 End moment of shameless self-promotion; back to our regularly scheduled program.
google it
This is a test this is only a test SAY HELLO TO MY LITTLE PAL this is only a test
C cell the seasick sea serpent.
I C
Your going back.
my dc restoration circuit needs 50 mg Skirizi
yep definitely dont trust colours especially in modern chinese stuff, i've had more than one usb lead with black positive, red negative, yes, really!😲