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  #1  
Old 10-19-2013, 05:12 PM
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Eric H Eric H is offline
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That's really interesting, thank you for posting it.

Two things I noted, they figured the average life of a color TV at eight years, not sure what constituted the end of life back then, maybe major repairs like a CRT or Flyback.

I also loved the little war between RCA's PC board construction and Zeniths hand wired sets, Zenith referring with a sneer to the "Plastic PC boards" and RCA saying PC boards were the future.
Well RCA was right about them being the future but as to quality I think time has proven Zenith correct.
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Old 10-19-2013, 05:57 PM
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Neat stuff! There were a lot of choices back then and it would have been tough deciding which one to get.


Quote:
Originally Posted by Eric H View Post
I also loved the little war between RCA's PC board construction and Zeniths hand wired sets, Zenith referring with a sneer to the "Plastic PC boards" and RCA saying PC boards were the future.
Well RCA was right about them being the future but as to quality I think time has proven Zenith correct.
I can't speak to RCA because I don't have any of their stuff from that time period, but GE had a lifetime warranty for their PC boards back then. Of all the GE TV's and radios I've got from the 50's and 60's not one has had an issue with foil separation or anything else that I can see.
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Old 10-19-2013, 06:23 PM
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Wayne,

Thanks for posting. I remember pouring over TV Guides yearly report on the new sets. Truly a nostalgic look back.

-Steve D.
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  #4  
Old 10-19-2013, 10:36 PM
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Quote:
Originally Posted by Eric H View Post
...Two things I noted, they figured the average life of a color TV at eight years, not sure what constituted the end of life back then, maybe major repairs like a CRT or Flyback...
The 8 year figure is probably from industry statistics on how long people kept their sets.
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Old 10-20-2013, 07:44 AM
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Originally Posted by old_tv_nut View Post
The 8 year figure is probably from industry statistics on how long people kept their sets.
That may be true. I have read that today most people keep their main TV about seven years before upgrading to the current technology.
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Old 10-20-2013, 01:11 PM
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Quote:
Originally Posted by Eric H View Post
I also loved the little war between RCA's PC board construction and Zeniths hand wired sets, Zenith referring with a sneer to the "Plastic PC boards" and RCA saying PC boards were the future.
Well RCA was right about them being the future but as to quality I think time has proven Zenith correct.
The latter didn't take much time at all, even by the 70s the boards in a lot of these RCA colour sets were dried to a crisp from tube heat.
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Old 10-20-2013, 11:42 PM
orthophonic orthophonic is offline
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RCA made those Armoire models up into the early 70's, there has been a
1967 model on my local craigslist for several months.
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  #8  
Old 10-21-2013, 12:48 PM
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Quote:
Originally Posted by Eric H View Post
I also loved the little war between RCA's PC board construction and Zeniths hand wired sets, Zenith referring with a sneer to the "Plastic PC boards" and RCA saying PC boards were the future.
Well RCA was right about them being the future but as to quality I think time has proven Zenith correct.
Quote:
Originally Posted by KV-1926R View Post
The latter didn't take much time at all, even by the 70s the boards in a lot of these RCA colour sets were dried to a crisp from tube heat.
The RCA printed boards and Zenith crimped-cone connectors reminded me of a conversation over 50 years ago, and I have a question that is like remembering a joke, but forgetting the punch line.

Back sometime between 1957-1959, an older non-working B&W TV set with a brand name unfamiliar to me came into the shop. My boss took one look at the set, muttered a cuss word, and he told me to not to start repairing the set, but pull the three IF tubes and use a vector adapter and measuring from the cathode, to see if any of the IF tubes had plate voltage on the control grids, and to confirm that there was plate voltage on all the plates.

I followed his odd instructions, and told him that the voltages were normal for pulled tubes. He told me that it then was OK to work on the set.

Dumbfounded, I asked him what was the problem this set had and he replied with the story:

RCA had a bright idea to eliminate the need for separate IF transformers in TV and designed a wide band TV circuit that used printed IF transformers. RCA never used these circuit boards in sets they made, but sold or licensed them to this company, who used them. Almost all started failing within a year or two. Between the cost of the warranty failures and the bad publicity from the out of warranty failures insured the demise of the company. In addition to this problem, the shields for the printed transformers often had cold soldered connections and to be sure I tapped them while watching the picture when I got the set working.

Which TV manufacturer got shafted by these bad circuit boards?

All I can remember about the set was it was a good looking walnut console in rather clean condition from a family that did not smoke and the chassis was made from very thin punched steel.

James

Last edited by earlyfilm; 10-21-2013 at 12:58 PM. Reason: typo
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Old 11-04-2013, 12:01 PM
dieseljeep dieseljeep is offline
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Quote:
Originally Posted by earlyfilm View Post
The RCA printed boards and Zenith crimped-cone connectors reminded me of a conversation over 50 years ago, and I have a question that is like remembering a joke, but forgetting the punch line.

Back sometime between 1957-1959, an older non-working B&W TV set with a brand name unfamiliar to me came into the shop. My boss took one look at the set, muttered a cuss word, and he told me to not to start repairing the set, but pull the three IF tubes and use a vector adapter and measuring from the cathode, to see if any of the IF tubes had plate voltage on the control grids, and to confirm that there was plate voltage on all the plates.

I followed his odd instructions, and told him that the voltages were normal for pulled tubes. He told me that it then was OK to work on the set.

Dumbfounded, I asked him what was the problem this set had and he replied with the story:

RCA had a bright idea to eliminate the need for separate IF transformers in TV and designed a wide band TV circuit that used printed IF transformers. RCA never used these circuit boards in sets they made, but sold or licensed them to this company, who used them. Almost all started failing within a year or two. Between the cost of the warranty failures and the bad publicity from the out of warranty failures insured the demise of the company. In addition to this problem, the shields for the printed transformers often had cold soldered connections and to be sure I tapped them while watching the picture when I got the set working.

Which TV manufacturer got shafted by these bad circuit boards?

All I can remember about the set was it was a good looking walnut console in rather clean condition from a family that did not smoke and the chassis was made from very thin punched steel.

James
IIRC, RCA did use those IF boards.
The set you worked on was probably a Stewart Warner. I think Stromberg Carlson used them, as well.
I never had a problem with them, but a friend had a freebee Stewart Warner, where the IF strip was all butchered up and wasn't worth the time to repair.
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