Пікірлер

• 
  @exeterslab7781Күн бұрын

  A great way of checking caps Ken. Thanks for sharing your knowledge :)

• 
  @kenslab1973Күн бұрын

  Thanks Frank

• 
  @UQRXD2 күн бұрын

  No robot could ever put that thing together.

• 
  @kenslab19732 күн бұрын

  I concur. Thanks for watching and your comment.

• 
  @exeterslab77815 күн бұрын

  Great work Ken. Showing your troubleshooting methods is a great help for beginners. You certainly know your stuff with TV's. Thanks for showing this and keep it up. PS: I love it when the DUT comes to life, it never gets old.

• 
  @kenslab19735 күн бұрын

  Thanks Frank, for the compliment, but actually you’re giving me too much credit, some things are still vague to me. DUT’s coming to life is always a great reward; you have that special knack of expressing your excitement.

• 
  @exeterslab778110 күн бұрын

  I love it when you change the band selector and it comes to life. An easy one for you Ken and a nice job on re-capping. Thanks for showing this :)

• 
  @kenslab197310 күн бұрын

  Thanks Frank, I love it when I actually remember where the band selector is at times. lol

• 
  @user-dq9gm7jy2k10 күн бұрын

  Good morning 😂

• 
  @migsvensurfing631020 күн бұрын

  One more saved and it seems to have a strong crt. Well done. That remote is well ahead of it's time.... no batteries needed....very green.

• 
  @kenslab197320 күн бұрын

  Thanks, I really like the clicker type remotes, pretty expensive even back in those days; I’m guessing, with the receiver, motor, gears, gear case, and relays.

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  @migsvensurfing631020 күн бұрын

  @@kenslab1973 Yes it has certainly been a luxury addition.

• 
  @exeterslab778120 күн бұрын

  woo hoo one that works. Great job solving all those problems Ken and a really nice finish having you on the screen wrapping it up. You're a marvel with these things.

• 
  @exeterslab778120 күн бұрын

  ps: I think your chair needs oiling lol

• 
  @kenslab197320 күн бұрын

  Thanks Frank, I knew I had a chance when the TV produced a raster, I’ll work on that noisy drum throne.

• 
  @mikeburton998725 күн бұрын

  Philips black and white tv’s in the late 60s did this very thing it was the lopt (or flyback) every time. If you can check your EHT it might be low. Replace the lopt and the black circle will be gone.

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  @kenslab197325 күн бұрын

  I really didn’t check the flyback final anode voltage since I did have a raster. If that’s the case it would be near impossible to find a flyback or even an equivalent one to replace it with. Anytime there’s a defective flyback or a deflection yoke where it’s not a simple fix, the TV is un-repairable to me. Thanks for your input.

• 
  @migsvensurfing6310Ай бұрын

  Is it the korrekt transformer ? Somebody may have had to change it and didn't get the korrekt model. I don't really buy the idea that the phosphor has gone bad... The whole surface ? But one way to find out is to hold an old clock with phosphor in front of the tube and see if it lights up.

• 
  @kenslab1973Ай бұрын

  Perhaps, but I think the vertical, horizontal power transformer/flyback and the deflection yoke are all original, although the flyback and yoke passed the ringer tests I’m thinking that there still could be the possibility that one of them respond differently under load and even after a spot on voltage tests prior to installing the chassis back in the cabinet. I need to purchase a ringer that will test said items in circuit under load. I’ve never seen a picture tube go completely dead as far as degraded/deteriorated phosphor. Years ago I’ve only read about such things and I think it’s possible. I’ll try you idea with the phosphorus clock or watch for that matter. The TV is still on the back burner in the event I do acquire a dedicated in circuit ringer tester. I disagree about this TV being low hour set though. Thanks for watching and your input.

• 
  @migsvensurfing6310Ай бұрын

  Seems to be a low hour set. You think this TV is dirty ? Oh boy most I have seen has dustbunnies everywhere. On my way to part 2.

• 
  @jimburns348Ай бұрын

  Better get that COPD checked out. 😊

• 
  @jimburns348Ай бұрын

  Need a real challenge? Try restoring a multi band radio.

• 
  @exeterslab7781Ай бұрын

  We all make rookie mistakes Ken lol, but they're good to show the beginners. I checked out Nostalgia and was able to download a schematic, not sure why you cant? BTW, you are finding some great looking radios

• 
  @kenslab1973Ай бұрын

  Yeah Frank, I show my mistakes to also show that I’m only human; viewers hopefully learn from them. I still can’t download on Nostalgia; I don’t know if it’s here in the States or my antivirus protection changed, I’m thinking the latter.

• 
  @exeterslab7781Ай бұрын

  @@kenslab1973 Ken, I just used my VPN to connect to the net via the USA and was able to download a schematic. Try turning off your anti virus and see if that resolves the issue

• 
  @exeterslab7781Ай бұрын

  You gave a it good go Ken, maybe a spare crt will show up

• 
  @AJ-po6upАй бұрын

  Beautiful set, this one is in great condition for sure, and the tube looks in good shape just judging it by how bright it can get, too bad the camera didn't do it any favors. I have this exact model, one of the few mementos left from my dad before his passing, sadly mine is pretty dim and washed out, we used it a lot so the tube is just tired. Still very worth keeping around as aesthetically is very pleasing and since it's small it doesn't take too much space.

• 
  @exeterslab7781Ай бұрын

  I've seen crappy solder joining so many times but not as many in the one radio lol. Well done Ken

• 
  Ай бұрын

  Long live CRT very dangerous voltages to work on,last much longer than the model flat screen TVs....

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  @exeterslab7781Ай бұрын

  A nice easy one for you Ken. A great looking radio

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  @exeterslab7781Ай бұрын

  Someone played checkers with the valves lol. Good job at fixing a very nice radio Ken. Great Magoo ad too :)

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  @kenslab1973Ай бұрын

  Thanks Frank, I didn’t check the pin-out on these checker pieces but obviously all three had the same filament pins. I thought I was going to get a copyright strike for the commercial; I had to steal this great idea from you.

• 
  @exeterslab7781Ай бұрын

  @@kenslab1973 Not a problem Ken, the more entertainment we can provide the better. I don't think YT cares about old ads, just copyrighted music. Keep up the good work :)

• 
  @exeterslab77812 ай бұрын

  Another dud crt, a real pity Ken. Spare parts I guess

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  @robinsattahip23762 ай бұрын

  GE never was known for quality.

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  @kenslab1973Ай бұрын

  Yep, spare dud picture tube also, I don't have one with the smaller pins.

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  @Thomas-yr9lnАй бұрын

  My uncle would buy nothing but GE when I was a kid. God only knows why.

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  @johnnytacokleinschmidt515Ай бұрын

  Every GE I find works. That's something.

• 
  @exeterslab77812 ай бұрын

  Bummer Ken. I wish I could offer some thoughts on how to progress but I know nothing about TV circuits. I'm sure something will pop into your head though. Good idea to start on something else

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  @pappalaprabhakar53562 ай бұрын

  Very nice video 📷📷📷📷

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  @kenslab19732 ай бұрын

  Thanks!

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  @exeterslab77812 ай бұрын

  You're doing your magic Ken. I'm sure you'll get the video going. Hurry up with part 3 lol

• 
  @kenslab19732 ай бұрын

  I'm trying Frank. :)

• 
  @thetube5772 ай бұрын

  I have this same radios Thanks for sharing. Could you please post which capacitors you used to replace with?

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  @kenslab19732 ай бұрын

  Various manufacturers, I get my capacitors and resistors from just radios in Canada. Everything is coming from Asia, perhaps mostly China today. They specialize in capacitors and resistors for vintage tube radios and electronics. I’ve purchased from just radios for many years and yet had a bad one or one to go bad. Not sure about how old their capacitors are but shelf-time is not a big problem for caps as it was in the past, and the construction is certainly way better than anything that was used when your radio was made. I have capacitors that are 20 years plus old and their all fine today. We all like to get electrolytic caps with the most hour rating but even low 5000-hour caps (not saying mine are) will last 1250 days if you played your radio 4 hours a day and I think they will even exceed that 5000-hour rating. Enjoy your restoration!

• 
  @thetube5772 ай бұрын

  I was curious of the values. Curious, if I have a used radio - would you just focus on replacing the caps, or would you replace the tubes as well? Unsure if it is worth all the expense. The AM portion has lost its sensitivity and requires more than normal volume to be turned up. FM works great.

• 
  @kenslab19732 ай бұрын

  No, never replace all the valves but you do need to have a way to check the valves since they can be bad as far as a weak tube, a grid leakage etc. For example, your AM issue could have a bad 12BE6 AM converter tube, check the 19T8 AM discriminator also. The tuning capacitor for the AM band will cause low reception if it’s dirty, clean it with contact cleaner, fully opened then while closing it keep spraying it with the cleaner. The FM has a permeability tuner so leave that one alone. The AM might need a full alignment to include the IF transformers A1 through A4 then the antenna and oscillator adjustments on the AM tuning capacitor to include the 600kH coil adjustment on top of the chassis. You should have the alignment instructions to do this alignment correctly. If you haven’t recapped this radio you need to do that first before you proceed with the above instructions. Change the electrolytic caps and all the wax capacitors, leave the mica’s along, also any resistors that are out of tolerance. @@thetube577

• 
  @rawtry653 ай бұрын

  I don't have AM but good FM...any thoughts? Thanks

• 
  @kenslab19733 ай бұрын

  Lubricate the RF gain potentiometer with contact cleaner spray. The band switch contacts might be dirty or corroded. This can affect AM reception. Try cleaning the band switch contacts using contact cleaner spray. Capacitors and Transistors in Zenith radios from that era generally have good capacitors. However, if the radio was stored in a damp environment, the capacitors could become leaky, affecting volume. Try removing and reinserting the socket transistors, clean the pins and use the red deoxIT on the sockets. Might be the oscillator transistor. One easy way to check that your LO is working is to place another radio next to your TO, with the dial at a blank spot near the top of the dial. Then put the TO on the AM/BC band and tune around between 1100 and 1200 KHz. If you hear the noise level drop significantly on the other radio, your LO is working. If you’re hear nothing on the AM band except when the BFO (Beat Frequency Oscillator) is on, it suggests that the IF (Intermediate Frequency) string is working. However, either the RF amplifier or, more likely, the LO (Local Oscillator) is not functioning. The oscillator transistor could also be defective. The FM RF and oscillator transistors are the same, number 121-687, I think. Swap them and the AM should work, and FM will not work. The oscillator transistor might be bad. Good luck!

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  @rawtry653 ай бұрын

  Thanks so much for the response...Looks like I have some work to do. I'm new at this but will take it slow.@@kenslab1973

• 
  @exeterslab77813 ай бұрын

  You sure know your way around TV's Ken. Very interesting watching you do the preliminary checks and initial power on. Looking forward to part 2 😀

• 
  @danielconant7493 ай бұрын

  Hi Ken, Nice restore. I'm finishing up a H104 but mine has the 6FS7 tube where your has the 6AT6 tube. I have another one that uses the 6AT6 tube. Where you said the .03 capacitor should have been a .01 I also had the .03. Did you replace the caps in the 2nd IF? If so what values did you use? I did not realize they were there. I took my 2nd IF can out to replace the wires and didn't see them. I also replaced the wires in the 1st IF. My other H104 had two 6550s instead of the 6Y6.

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  @kenslab19733 ай бұрын

  Daniel, It’s been a while since I did this restoration and I do remember the 47K resistor. I don’t think I changed or remember changing the 2nd IF caps but C39 and C40, I believe both of them are to be 100pF each. The schematic does show the caps but no values as you know, also make sure you have the Riders Volume 17 - Changes 17-9 Hope that helps.

• 
  @danielconant7493 ай бұрын

  @@kenslab1973I have the 1709 changes. Thanks

• 
  @exeterslab77813 ай бұрын

  Good one Ken. That little radio sure sucks some power when started up. I thought you had an internal short somewhere. Luckily it was all good

• 
  @kenslab19733 ай бұрын

  Thanks Frank, the small 60-watt bulb is good for the AA5’s but I might have to go up to a 75-watt bulb. I always check the watts and amperes during and after my repairs. The height of the camera/tripod needs to be moved up and closer as well as my lighting to adjust for the new bright ceiling lights. I'm finding some bugs in the new lab as I'm using it. :(

• 
  @exeterslab77813 ай бұрын

  @@kenslab1973 You'll sort out the production problems for sure Ken. I use a 150watt globe only cos that was all I had at the time. It doesn't show the initial power surge or low wattage consumption but it does show those pesky shorts from caps or trannie windings etc. Keep it up :)

• 
  @migsvensurfing63103 ай бұрын

  Thank you for the video. It is indeed a nice little radio. You mentioned earlier in a comment to me that you have bad MW reception where you live so what about setting up a frame antenna outside with an amplifier, feed in a coax. This arrangement can be connected to antenna terminals to any radio or loosely coupled with a small coil to an internal antenna. I think you would be happy with that. I don't think it is impossible to receive MW anywhere in the world where people have setled down maybe except the poles.

• 
  @kenslab19733 ай бұрын

  Thanks for the suggestion, I’ve pondered on the frame antenna idea years ago and there are certainly a tons of DIY videos on KZread regarding that. Perhaps I will in the future but ever since I got a decent satellite radio, I gave up on the frame antenna idea for now. I like having the option of listening to various news stations 24/7, various music genres and OTR stations instead of what the limited radio stations has to offer, also I can listen to stations globally with the satellite radio. The closest radio broadcast station near me is close to 40 miles away, if you call that near me and with the mountains surrounding me, the antenna could definitely help but I think it would still be a challenge even with the best well-built frame antenna. Thanks for watching my channel.

• 
  @stephenmusch563 ай бұрын

  When doing videos, please have more close-ups of what you're doing. Hard to see what you're doing when it looks like I'm sitting ten feet away from your work bench.

• 
  @kenslab19733 ай бұрын

  Thanks for your concern; you are correct about the quality of this video. After going from a lower table to an actual 36” height work bench, I’ve been trying to adjust my camera/tripod to correspond with the extra bench height. That will hopefully be improved in my upcoming videos as well as better lighting since I installed ceiling lights and now using the side and over the top work bench lights, I have to work on preventing over lighting. Thank you for watching.

• 
  @exeterslab77813 ай бұрын

  Great video Ken. You have an impressive lab and well set out. I can see how much work was involved but well worth it. The array of test equipment you have is superb and makes me want to collect more lol. Thanks for putting this up and I'm looking forward to your upcoming videos. Also, when I saw your seat I said to myself, that's a drummers throne, my friend Henry has one similar to yours. I' also like to thank you for your service during the war, You're a good man Ken. :)

• 
  @kenslab19733 ай бұрын

  Thanks for the kind words, Frank.

• 
  @jimburns3483 ай бұрын

  Can’t hear you with the ringing in my ears.

• 
  @elmediafiregamer5 ай бұрын

  Nuevo suscriptor

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  @justinrayguitars60245 ай бұрын

  Got one gave to me today. Plugged it in and it does nothing so I am looking forward to getting into it.

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  @kenslab19735 ай бұрын

  Cool! Hope you get it working,

• 
  @exeterslab77815 ай бұрын

  You certainly go where I fear to tread Ken. What a massive heat sink! I could see there was a lot of work involved in that resto. Well done again :)

• 
  @myradiovideos5 ай бұрын

  I have fixed 2 of these over the last few years. Sometimes pulling out the heat sink, cleaning the contacts and pushing it back in solves several intermittent issues. As for the capacitors, same problem, but all I do is Offset the terminals, by drilling 2 new holes for one of the 2 capacitors and they fit right in .. FYI, Robert

• 
  @kenslab19735 ай бұрын

  Thanks, I did clean the 4 power transistor sockets with alcohol. Drilling holes for the 8200uF caps is one way to go and I thought about it, but I decided to solder 20-gauge solid wires on the capacitor leads instead which was just as good, they were very close and snug on the pc board.

• 
  @barryfleischer65536 ай бұрын

  I recapped one of these from 1950, gold dial plate. Fantastic radios! huge warm sound very sensitive. I was lucky that the case on mine was in mint condition.

• 
  @deanagoes27916 ай бұрын

  I found cases where the image was blurry even though the focus had been adjusted because the picture tube socket was corroded due to moisture.

• 
  @exeterslab77816 ай бұрын

  That's a neat radio kit Ken and a big sound. Great job yet again

• 
  @exeterslab77816 ай бұрын

  Well done Ken, I love it that you show stuff I wouldn't think of touching. The circuit board on the sony just gives me the willy's lol and I'm guessing replacement parts would be near impossible to come by. Keep it up :)

• 
  @kenslab19736 ай бұрын

  Thanks mate.

• 
  @migsvensurfing63106 ай бұрын

  Well its a Sony... Playback on these Walkmans is very very good, recording however.... It was like that on most of these from all brands back in the day. Many didnt even have a real erase head but just a permanenet magnet that moved towards the tape when the recording button were pressed. I did like the DieHard 9V battery trying to die hard with its poles against the blank tin can. 😁

• 
  @kenslab19736 ай бұрын

  It's not a Walkman.

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  @knifeswitch59736 ай бұрын

  They all missing that badge boss!

• 
  @kenslab19736 ай бұрын

  Yeah, your right, I still have a couple of the Zenith badges that I acquired years ago. Thanks for watching and your comment.

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  @exeterslab77816 ай бұрын

  How cool to find a message that reads from mom and dad, what a lovely testament. I also have to laugh at how difficult those engineers make it to extract the chassis at times, way to much overkill I think lol. This Zenith chassis is also reminds me of certain philips chassis' we get down here, notably that flat sheet on the back of the chassis. I also marvel at how far ahead you guys were in comms. We didn't get FM until the mid 70's and colour TV was launched in 1975. What a backward country we were lol. An easy one for you Ken, keep it up :)

• 
  @kenslab19736 ай бұрын

  I remember color TVs started becoming popular in the late 60's. My grandparents wouldn't purchase one because they thought the color would wear out, like it had color ink in them or something, lol.

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  @exeterslab77816 ай бұрын

  That is so funny. When daylight savings was going to introduced here in the late 70's I think, they showed a Queensland farmer's wife on the news saying, oh no, if you put the clocks ahead 1 hour, then the cows won't know when to give milk AND she was serious lol. BTW, the sate of Queensland still doesn't participate in daylight savings time. @@kenslab1973

• 
  @exeterslab77816 ай бұрын

  Amazing Ken, you really know your stuff. I'm hopeless with solid state. Great fix :)

• 
  @kenslab19736 ай бұрын

  Thanks Frank, I had to wing it because like most pocket radios, there's no schematics.

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  @austinstitzel7 ай бұрын

  I'm gonna guess that you are a Capricorn.

• 
  @kenslab19737 ай бұрын

  Interesting, how did you come up to that conclusion?

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  @austinstitzel7 ай бұрын

  @@kenslab1973 because I love astrology and guessing people's signs.

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  @josephtome96007 ай бұрын

  Knobs for this set are hard to find. They are falling apart with age.

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  @kenslab19737 ай бұрын

  The knobs on mine were perfect; they do have long shafts on them. I had to use a long screwdriver inside the radio to assist in pulling then off. I always use white lithium grease on the shafts to ease installing them back and taking them out in the future.

• 
  @exeterslab77817 ай бұрын

  good find on the blob of solder Ken.

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  @kenslab19737 ай бұрын

  Thanks Frank, that Capacitor Wizard does a nice job checking out bad e-caps in circuit by generating a 100 kHz sine wave, but it doesn’t sniff out a short in a good e-cap circuit.

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  @migsvensurfing63107 ай бұрын

  Good that it came to life again. I wish we would have Zenith radios in my country but I have never seen one here. They seem to always be sensitive and working well. Much worth the effort to keep them running. Thanks for the video.

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  @kenslab19737 ай бұрын

  You’re welcome, like other KZreadrs were happy to share radio/TV repairs and or restorations to anyone who is interest in this hobby and also, hope that we can help other hobbyist with them in any way we can. This is one of my favorite Zenith pocket radios and is definitely a keeper.

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  @zhaohaigaogu78217 ай бұрын

  当時の製造工場のようでした。ループコイル凄いですね！シャーシの取り出しも素晴らしかったです👍

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  @kenslab19737 ай бұрын

  コメントと私のビデオを見てくれてありがとう。

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  @johnnytacokleinschmidt5157 ай бұрын

  These are plentiful and can work very well. I find the antenna whips are often broken.

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  @kenslab19737 ай бұрын

  That, or the cases are in poor shape. Thanks for watching.