That set is an upscale black and white. It is made with the same quality level as RCA's color sets. The low cost models had no power transformer. Those pots come apart fairly easily, 4 tabs hold it together. If the stop is broken though, the bakelite wiper is likely mangled. I think it would be nearly impossible to find an exact, or even close replacement. It might be easier to just attach a trimmer pot on the circuit board. Once the horizonal frequency was set, you usually didn't have to adjust it until you replaced the oscillator tube. The horizontal foldover is likely caused by shorted windings on the deflection yoke. The lack of snow with no signal might also be due to the AGC being badly misadjusted.
Check the waveform on the grid of the horizontal output. Do not try to measure the plate. A scope can tell you a lot, I notice too few people use them.
Hopefully you can find the correct potentiometer for the horizontal hold. I bet this TV had a lot of horizontal issues from the beginning, and the owner probably played and played with the knob so much it just got worn out. Finding the correct value potentiometer can be hard for an old set like this. These look to be very heavy duty control knobs so i bet the original owner was rough with it. Also i like to call these a hybrid set due to the fact it has tubes as well as electronic components like capacitors resistors, and coils. The tubes act like ic's. So you basically have a chassis that's part electronic, and part tube. Later down the road when ic's came along well they went to full solid state. These as well as the Zenith brand sets were very well made sets. I hope you can get it fully working again. Great vide.
Sometimes it's because a lot of people changed over from B&W to color. So a whole load of perfectly good B&W sets were relegated to the shed, or outside, like this example.
The reasons sets got retired in the 1960's were: (1) CRT needed replacement, which usually cost about half what a new set cost. (2) Too many trips to the TV repair shop. Most sets needed the high power tubes, like the horizontal output, to be replaced every 2 years. Sets that were trouble prone had a short life because, the average repair shop Bill was 1/3rd the cost of a new set. (3) When color sets became more affordable in the late 1970's, some B&W set did get removed but, seldom thrown away if working, due to the cost. They would often times get traded in on a new set or get donated to a thrift store. TV sets were quite expensive in the 1960's. The entry level color set in 1966 was $300, or about $15,000 today indexed to the price of gold. The average family income then was $75 a week.
@@channelsixtysix066 Hey ss, you are very welcome. I was born in 1955, was always interested in TV's, and worked as a TV Tech in Miami, Florida during the mid-1970's so, experienced it firsthand.
@@billharris6886 I regularly watch TV and radio servicing channels, because of my own electronics background. Whilst I can see the value of keeping old TVs going for historical purposes and for interest, it is a concern there are no facilities any more for rebuilding CRTs. What's left, isn't going to last forever. In Australia, we generally don't have the same desire to keep old TVs. They are quickly replaced with new gear. Old radios are more of a thing.
While my grandmother was cooking dinner, I got ahold of a screwdriver and took this exact model apart. My grandfather was furious with her for letting me do it, and also do it with it plugged in. I was five years old at the time.
That was about the age i discovered electricity, as i was obsessed with an old fan my father had, which had a short in the switch or cord. Plugging it into the wall led to an electrifying experience. I was hooked
Yes, I can service sets if they're brought to me. I am no longer taking in any consoles until further notice. However tabletop sets 21" and smaller sets I'm considering depending on what someone is willing to spend. These old sets are time vampires and often take hours of time and parts to make run. I do these videos for entertainment and educational purposes to show what can really be involved
Dear sir i am having an AM radio which has MW, SW1 SW2 bands. Until last day it worked and yesterday it doesn't picked up any stations in all 3 respective bands. I have checked all the IFT transformers for any possible open circuit and soldering joints and checked the band sliding switch too. Finally i suspect the gang capacitor and checked. The upper terminal became loose and i soldered it properly. Even though the terminal goes inside the capacitor is not properly connecting the capacitor. I opened the outer top cover of the gang and just remove one moving plate, one static plate (sheet) and insulator and i don't want to mess the gang and put it back. After fixing the gang it still not working hence the entire receiver is not picking up any stations. Should I need to change the gang capacitor or is that possible to repair the gang. Please suggest sir.
That's alot of effort for this set. If it were an Uber rare radio and there were no other options maybe. I was told this is a 70k pot, so a 100k will probably work fine. Just gotta find a long shaft and cut and machine it down
@@JordanPier I do understand. It's just that the time and efforts of finding a replacement, fiddling with it and then replacing it, in the end can turn out to be more laborious than cleaning and rebuilding.
I love old wire wound connections... I still use them when I can...
Highlight at 04:30 when the back of the set comes into view. Magnificent. Exudes quality.
That set is an upscale black and white. It is made with the same quality level as RCA's color sets. The low cost models had no power transformer.
Those pots come apart fairly easily, 4 tabs hold it together. If the stop is broken though, the bakelite wiper is likely mangled. I think it would be nearly impossible to find an exact, or even close replacement. It might be easier to just attach a trimmer pot on the circuit board. Once the horizonal frequency was set, you usually didn't have to adjust it until you replaced the oscillator tube.
The horizontal foldover is likely caused by shorted windings on the deflection yoke.
The lack of snow with no signal might also be due to the AGC being badly misadjusted.
Check the waveform on the grid of the horizontal output.
Do not try to measure the plate.
A scope can tell you a lot, I notice too few people use them.
Oh yes. I will resort to that if replacing the dead horizontal hold pot doesn't improve things.
Hopefully you can find the correct potentiometer for the horizontal hold. I bet this TV had a lot of horizontal issues from the beginning, and the owner probably played and played with the knob so much it just got worn out. Finding the correct value potentiometer can be hard for an old set like this. These look to be very heavy duty control knobs so i bet the original owner was rough with it. Also i like to call these a hybrid set due to the fact it has tubes as well as electronic components like capacitors resistors, and coils. The tubes act like ic's. So you basically have a chassis that's part electronic, and part tube. Later down the road when ic's came along well they went to full solid state. These as well as the Zenith brand sets were very well made sets. I hope you can get it fully working again. Great vide.
This set has a lot a problems!
All these old sets that are repaired, I always wonder if the broken parts were from age or if they were the reason the set was retired.
Sometimes it's because a lot of people changed over from B&W to color. So a whole load of perfectly good B&W sets were relegated to the shed, or outside, like this example.
The reasons sets got retired in the 1960's were: (1) CRT needed replacement, which usually cost about half what a new set cost. (2) Too many trips to the TV repair shop. Most sets needed the high power tubes, like the horizontal output, to be replaced every 2 years. Sets that were trouble prone had a short life because, the average repair shop Bill was 1/3rd the cost of a new set. (3) When color sets became more affordable in the late 1970's, some B&W set did get removed but, seldom thrown away if working, due to the cost. They would often times get traded in on a new set or get donated to a thrift store.
TV sets were quite expensive in the 1960's. The entry level color set in 1966 was $300, or about $15,000 today indexed to the price of gold. The average family income then was $75 a week.
@@billharris6886 Your last paragraph puts everything into sharp relief about the cost of new electronics back in the 1960s. Great comment.
@@channelsixtysix066 Hey ss, you are very welcome. I was born in 1955, was always interested in TV's, and worked as a TV Tech in Miami, Florida during the mid-1970's so, experienced it firsthand.
@@billharris6886 I regularly watch TV and radio servicing channels, because of my own electronics background. Whilst I can see the value of keeping old TVs going for historical purposes and for interest, it is a concern there are no facilities any more for rebuilding CRTs. What's left, isn't going to last forever. In Australia, we generally don't have the same desire to keep old TVs. They are quickly replaced with new gear. Old radios are more of a thing.
While my grandmother was cooking dinner, I got ahold of a screwdriver and took this exact model apart. My grandfather was furious with her for letting me do it, and also do it with it plugged in. I was five years old at the time.
That was about the age i discovered electricity, as i was obsessed with an old fan my father had, which had a short in the switch or cord. Plugging it into the wall led to an electrifying experience. I was hooked
I use the same tube tester. I've always found its readings to be reliable.
Such a nice tube tester, well worth while buying a couple of new/good valve sockets.
Those pots in the tv are well past dead,
indeed its a nice tube tester i have a B&K 700 thats currently being restored by me
With the fold over it almost looks the horz. Osc. is running at twice its frequency , I wonder if it’d show two pictures side by side?
Do you help people get old TVs working?
Yes, I can service sets if they're brought to me. I am no longer taking in any consoles until further notice. However tabletop sets 21" and smaller sets I'm considering depending on what someone is willing to spend.
These old sets are time vampires and often take hours of time and parts to make run. I do these videos for entertainment and educational purposes to show what can really be involved
It's easy to get caught out chasing what is assumed to be more complex faults, when all it could be is a faulty pot.
Dear sir i am having an AM radio which has MW, SW1 SW2 bands. Until last day it worked and yesterday it doesn't picked up any stations in all 3 respective bands. I have checked all the IFT transformers for any possible open circuit and soldering joints and checked the band sliding switch too. Finally i suspect the gang capacitor and checked. The upper terminal became loose and i soldered it properly. Even though the terminal goes inside the capacitor is not properly connecting the capacitor. I opened the outer top cover of the gang and just remove one moving plate, one static plate (sheet) and insulator and i don't want to mess the gang and put it back. After fixing the gang it still not working hence the entire receiver is not picking up any stations. Should I need to change the gang capacitor or is that possible to repair the gang. Please suggest sir.
Very rare for a ganged capacitor to fail. More likely that the oscillator transistor for mw/sw failed.
How about rebuiling the pot/pots ? You can buy carbon spray for that very purpose.
That's alot of effort for this set. If it were an Uber rare radio and there were no other options maybe. I was told this is a 70k pot, so a 100k will probably work fine. Just gotta find a long shaft and cut and machine it down
@@JordanPier I do understand. It's just that the time and efforts of finding a replacement, fiddling with it and then replacing it, in the end can turn out to be more laborious than cleaning and rebuilding.
Dang, that lil’ set has some issues!
It's got vertigo! 🧐
RCA Drawing no.
You have a bad yoke