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Thank You!

Glad you like the radios, Thanks for watching and the reply.

15:00

@@migsvensurfing6310 Thanks, I get it now

Good question Frank, I'm not really sure about the exact function, I think I mentioned that perhaps it could be for EMI noise, but it also could be to filter out high frequency noise just like a previous video I did where the positive end of a 2uF electrolytic capacitor goes to ground.

@@kenslab1973 Thanks Ken. Always good to see odd ball stuff like that

I concur. Thanks for watching and your comment.

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

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.

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

ps: I think your chair needs oiling lol

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

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.

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.

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.

@@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

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.

@@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 :)

GE never was known for quality.

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

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

Every GE I find works. That's something.

Thanks!

I'm trying Frank. :)

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!

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.

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

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!

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

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.

@@kenslab1973I have the 1709 changes. Thanks

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. :(

@@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 :)

Thanks for the suggestion, I’ve pondered on the frame antenna idea years ago and there are certainly a tons of DIY videos on TH-cam 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.

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.

Thanks for the kind words, Frank.

Cool! Hope you get it working,

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.

Thanks mate.

It's not a Walkman.

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

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.

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

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

Interesting, how did you come up to that conclusion?

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

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.

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.