62 year old Sansei FM / AM Tube radio gets Nasty and Distorted when it warms up. Let's fix it.
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- Опубліковано 2 сер 2024
- Here is a 62 year old radio that belongs in a museum, it is in great shape and now sounds as good as it looks.
- Наука та технологія
Wow - my dad bought one of those when I was a kid - sometime around the year 1960 - I think it was just when some quality electronics were just starting to show up from Japan. It worked well and lasted for at least 10 years - don't remember what happened to it - probably lost it during a move - it never seemed to age - though the top of the cabinet did end up with some raised brown spots on top from the heat of the tubes over the years. Even though the radio said it had AFC I seem to remember that every so often the radio would drift enough on FM that a slight adjustment of the dial would be required - maybe due to all that heat inside the box.... anyways congratulations on an excellent find and your amazing ability to zero in on the problems which I am in awe of.
27:14 You're right! It is an AC/DC radio :)
Nice looking radio :) Childhood nostalgia was the reason for me too, when I bought an 80's Aiwa CS-250 radio-cassette player few years ago. My parents bought one new in 1985 and used it a lot myself as a kid, recorded music from radio to cassettes, etc. The original Aiwa ended up from kitchen to garage radio and I guess finally to the electronics recycling when they moved to smaller apartment.
I like the phrase "He who dies with the most radios wins." I have quite a few but I know I'm nowhere near going to be the winner... and I'm not immortal, I just don't think I'm going to collect enough. But that's not going to stop me trying (don't tell my wife).
I was at a fellas place a few years ago working on his internet connection. He ha a room that was full of small table radios. Every one I can ever remember seeking. Wood box, Bakelite, plastic, metal cabinet. Ac powered, battery powered. He must have had over 100 in a spare bedroom. The room next to it was his ham radio room which was full of vintage and modern ham radios. I think this guy is the winner already. He was in the process of restoring a Marconi when I was there a few years ago. A few of the ones I have i got from him. Sold me his duplicates. If course he kept the one in better shape.
That's a nice looking old radio. Sounds good as well now you've fixed it.
29:53 - Before you button her up, check to see that that antenna wire is capacitively-coupled to the input. Lots of those hot-chassis radios died a premature death when that antenna contacted ground!
even with an intact capacitor it was unwise to touch the central heating radiator with one hand and the open contact of the antenna wire with your other hand. Ouch.
The only tube radios I remember as a kid were clock radios, one was a Motorola (which I have an identical set my father had) and a Sylvania. I killed the Sylvania. I hit the cord with my leg accidentally, knocking the radio to the floor. Repair shop said the circuit board was broken. The Sylvania had a control knob to increase the green clock dial light. Both were AM radios.
That radio you have there is really nice.
Yes i like it. It's the most expensive radio I have purchased. Paid 50 for it. Most of the old anti we use radios I get for 10 to 20.
Beautiful radio thank you
Love the old tube radios too! Also collect them.
In my youth, I use to tinker with these as well. If memory serves correctly, if you turn tuning all the way, high or low, you can 'pull' the chassis loose from the pointer setup. Install is a firm push in and adjustment is full range tuner now, low to high and back again.
wow amazing
I remember that old type of cabinet! They all would feature chrome-painted edges that would prematurely flake off.
Interesting, I never even knew of the existence of FM on valve radios, as we call them. FM radio was only introduced in the mid 1970's in Australia. Just goes to show how behind the times we were back then. Also I'm always shocked (no pun intended) when I see your mains powered radios without a mains transformer. 😲
A few years ago Dave serviced a 1953 Grundig radio that had FM as well.
@@crashbandicoot4everr Thanks, I'll have to check out that video.
FM came out in 1933.
@@clemsonbloke Wow really, so the general public could go and by an FM radio receiver way back then?
As this is a 1960-61 model, I don't see any CONELRAD triangles at certain positions on the AM dial. I assume this is the case because this receiver was originally intended specifically for the Canadian market.
you are spot on!!!, there is no "CIVIL DEFENCE" triangles on the dial front.
Nice find sir.
I was willed one like this when my grandfather passed, it worked great, in my opinion it had better sound quality then it's modern counterpart,Liked
Tube gear sounds fantastic. Why do you think the high end amplifiers are all tubes even today.
@@12voltvids I've noticed that also, my own devices just had one put together
sounds really good
Sure does.
Nice. Thing will last another 60 years easy
50/50 chance of a hot chassis - this is nuts :D. 60's must have been fun to live in.
No polarized plugs, no GFCI, not even a ground at the outlet. Those where the days.
Amazing you knew what might be the problem and fixed it first shot. Great to see this radio back in working order. Now I have a challenge to find you a stereo radio from that era. I just ordered/bought a Toshiba D-VR5 like the one you said was a great machine in one of your past videos, but didn't pay attention to the Amazon description, it did not come with a remote. Bummer what to do, searching for someone selling a remote is not going to be fruitful seems no one kept the remote. Hope I can figure out how to use it without the remote, since in your video you seem to think it is needed. ( Dubbing )
Universal remotes from the era may be useful if you can find the correct codes for it
@@rawr51919 Thank you. I will try to exhaust flea markets. Also, just found a site that sells remotes. I did find some folks selling the universal remotes, but would need the dubbing function. Thank you again for the reply / help.
The Toshiba remote for my DVR 7 works as does my harmony remote.
23:40 - I don't believe it's gone up in capacitance. The ESR slows the charging of the cap, faking out the capacitance meter.
Beaultiful Aways Machine Time Aways
👍👍👍
Well done :-D
Dam anode to grid coupling, i've seen it in my frends valve amplifier, leaky crapacitor :-(
If you have to remove the chassis, i suspect the needle will slide out of the big slot using a arc welding rod with a 90 degree bend in it.
The same for putting the chassis back, rod used to guide the needle through the big slot.
But you have fixed it's problem so no chassis removal :-D
Sounds nice and the insides look in spanking condition.
When i was in radio repairing field many more brands and models in india the oldest radios has used mullard tubes ☺️
I'd like to reword your ending quote. It should be "He who dies after fixing the most stereos wins." and in that case you may have a win :)
Ok, "radios"...oops, they are not all "stereo".
That cabinet looks a lot like a Channel Master branded radio produced in this same era. I believe Channel Master was the Sanyo company's name in the 60s.
I have one exactly like this except it says "Hi-Mood" instead of "Holiday" on the speaker. Thanks for your video, as it also has poor sound and I will need to change that cap. I've had the chassis out and somehow got it back in, and it was such a pain I took notes and stuck them to the bottom. I didn't record how I got it out but I imagine you could reverse the directions.
To remove: 1. Tuning cap closed, dial pointer at left (55/88 end of dial).
2. Fasten the metal dial track at the end away from the notch, leave notch end unscrewed, and slightly lower it to allow pointer to go into notch. [I must have removed that dial plate with the chassis]
3. slide chassis in while guiding tip of pointer into notch. It should find its way in.
4. Turn tuning knob slightly toward the middle, guide pointer onto metal track and now pivot the track up to line up the holes for the screw, and fasten the screw.
5. Fasten 2 chassis screws and 4 speaker screws. [I must have had the speaker out as well]
Hi mood is the same radio. Yes I figured out that the pointer would come out at the low end if the band. Mine sounding great now.
nice find
I like seeing those old radios restored to origional state instead of converting them to guitar amps.
Similar as Goldstar A-501, Korea first radio from 1959
I have one just like that one, except the one that I have "HAS NO CASE". it was a 5 dollar radio that I bought at a "THRIFT STORE", and it does work!!!!. one of the "I.F. transformers " was replaced( 2nd stage A.M.) .I did look that radio up in the "SAMS PHOTOFACT" annual index, and you are "SPOT ON" NO LISTING FOR THAT RADIO/ manufacturer
Nice radio. Never heard of Sansei, I wonder if it was a Canada-only brand (sold under a different name elsewhere). 105-120 volts definitely suggests Canada to me; I heard somewhere that back then parts of Canada only had 110-volt house current.
110 / 220 was what we had till about 1967 when they brought it up to 120/240
I've heard that the Canadian mains system was also running on 25 cycles AC up until shortly before this receiver came off the assembly line.
@@chetpomeroy1399 believe it or not 25hz power was still in use untill 2009 in Niagara falls.
www.technology.niagarac.on.ca/people/mcsele/interest/rankine-generating-station/
Around 23:45 when you're testing the capacitor, the capacitor's farad rating hasn't gone up, the capacitor has become electrically leaky. When capacitors have enough leakage, they'll fool the capacitor tester by draining the charge faster than the tester expects, so you get a false reading. So it's as you suspected, leaky capacitor.
That's right. If it was say a 100uf normal would measure between 90 and 120 (-10 +20%) but if that 100 if was measuring 200, then you know there is internal leakage, as cap checker is measuring the time it takes the cap to charge. The internal leakage will affect the charge rate and display a higher reading.
18:39 - My guess is a leaky coupling cap which is over-biasing the output tube.
It was the small electrolytic. Also remember this is class a single ended so there is a fair bit of idle current anyway.
Good SOWND OLD RADIO
Tube valve ECH and UCH Series
Nice
Thanks
There’s no chance of a major shock hazard here in the U.K. as al plugs are three pin and polarised
Ok now perhaps, how about back in 1960?
Ours are also polarized and 3 prong outlets now too. We have both 120 and 240 outlets. Small devices run 120, large 240.
Better be careful with that back panel, most of those "wafer" type backs have Asbestos in them. This is because you have tubes that get very hot and they didn't want the fibers to light up.
Definitely has asbestos in it.
Wow, radio waves travel faster than tv transmitters, 📱⁉️⁉️⁉️⁉️📱⁉️⁉️⁉️📱⁉️⁉️⁉️
My father was also bring this type of radio size was big battery also so biggest then radio
Grid capacotor for output tube is never electrolytics. usual value is around .01 uf
It's not the grid capacitor those are all ceramic on this radio it's a Cathode follower
make a video of your collection!
A leaky capacitor putting positive voltage will cause this exact problem. It will kill the tube too.
Yeah that's why we always change the paper caps in tube radios because the coupling caps will pull a positive voltage to the grid and drive a tube into over by a switch wheel kill the tube and kill the output transformer as well. This one however has no paper caps it has ceramic caps throughout it and ceramic caps typically don't go bad like the paper caps did. the reason that paper caps went bad was because bleach used in the manufacturer of the paper over years causes the paper to break down and become slightly conductive. Ceramic on the other hand does not break down. ceramic caps can fail but it's usually caused by if the outside ceramic coating it's chipped or damaged and allows moisture to get in or if the leads themselves are bent too close to the ceramic seal which allows moisture to get in which can cause them to fail but this is generally only a problem in very high voltage caps where moisture, and air can allow for Corona to farm and burn the cap up.
60 years yego FM nil
none of my business, but at 7:40 if you look over the clear plastic near the speaker and over the number 5 you can clearly see the tabs which you should be able to press down to remove the front so you can get access to the back.
They are glued in place.
Interested
That looks noice! Snailie lichen MidMod design...
Says Hi-Fi on it but it's not actually as only 1 speaker & mono.
Mono can be HiFi. And stereo can sound like shit. Just listen to XM radio.
@@12voltvidsSiriusXM is bad I admit that!
@@drsysop I have heard am radio sound better.
@@12voltvids I remember AM Stereo as my old GM Delco had it & was C-QUAM stereo in my 1988 Camaro & sounded pretty decent if noise level was low.
@@drsysop I had an stereo in my car too. Sounded great. All the stations were in stereo at one time.
Slight correction on the pronouncing of that name. It's sounds like this Sen-say or sun-say not Sansei,
Wow Dave that's a gem of a find - MY GOODNESS It was NOT made in china!!! being made in Japan should speak volumes of the precise craftsmanship and good Quality of components..
It was and it was cheap.
Assembled by women..I saw a photo of a watch co. In Japan all women workers. They are quite good at assembling things.
Yes, because they were paid a fraction what men were paid. I saw a documentary on both the RCA and zenith tv plants. Men engineered them and built the heavy wood cabinets. Women soldered all the parts into the chassis. Women assembled vacuum tubes. Smaller hands and a good eye for intricate work. Get this. Zenith factory in the 70s paid assembly workers .75 per hour. They moved the factory to Mexico where they paid the workers .25 per day!
12+12+17+12+12+50=115 volts
Wow someone can add. Good job!
Made in Japan..👍
not made in China
Too much talks, comments, manipulation, gesticulate Instead all we want to see is disassembling, checking , servicing , repairing... but Amercans will learn to make decent, informative and useful videos when the hedgehogs and opossum will learn to crosswalk highways...just a matter of evolution 😂
Loser.
I've always thought his videos were *very* informative and helpful -- I just hope he doesn't forget about safety and get shocked!
@@chetpomeroy1399 a little jolt never hurt anyone.
Jeez why are we slamming Americans for their video making prowess? Someone is a bit sensitive I think. This channel has more than enough total disassembly of electronics.
@@billmcdonald2436 I'm just offended that I am referred to as an American.
Very irritating intro and music.
Opinions are like asssholes everyone has one.