#16
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Wasn't Magnavox making an all solid state B&W set in the early 60's?
I think the last car radios with tubes were around 1964. Particulars escape me at the moment.
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AUdubon5425 Youtube Channel |
#17
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We owned both Ford and GM 1964 model vehicles, and they had both switched to solid state AM car radios by then. My brother had a '62 Chevy Corvair, and I worked on the radio once and seem to recall it had four vacuum tubes, but an audio output transistor.
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#18
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I've seen a few of those types of radios. They used low B+ tubes and transistors in the audio driver and output stages. I think they first appeared in the late '50's.
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#19
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This is maybe a little outside of this discussion, OTOH, maybe not. In 1984, during the Reagan era military build-up, an order was cut for several Naval vessels to be equipped as the last contracts specified. The design dated from the Sixties, & these boats had R-390As as std equipment. So, a company was set up- Fowler Industries, & they turned out brand-new 1960s spec-R-390As in 1985. I think 10 were built, at a reported cost of (Gulp !) $30K apiece. They could have easily gotten R-390As on the hobbyist/surplus market, for maybe 1% of the price of that, but the contract specified "New", & that was that. Naturally, when the inevitable draw-down came, all those radios were surplused out, & I think several of them have found their way into eager new owners' hands...Serial #1 was in the infamous St Julien's Creek surplus "Pile" of R-390As that sat outside for over a year before they got sold off, basically as scrap....
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Benevolent Despot |
#20
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For 1974, the RCA CTC39 was sold. We suspected RCA was using up old stock parts and it makes sense though. They would get rid of a lot of tubes that way.
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julian |
Audiokarma |
#21
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The poster that indicated that GE made tube type Portacolor sets until 1977 is correct. I have a couple.
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#22
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I also have both GE and Sylvania solid state B&W TVs from around 1965. The GE uses high voltage diodes(3 in series) for the HV rectifier, so is truly solid state. Not sure about the Sylvania.
I just replaced the horizontal output transistor on the Sylvania. I was afraid that the flyback had went, but once the shorted transistor was replaced, it seems to work fine. I also have some small later 1960s Philco/Ford B&W sets that are solid state except for the HV rectifier. |
#23
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I just picked up an RCA portable from 1974, a series strung set. Amazingly it works well as I found it!
-J |
#24
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TV or radio?
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#25
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Never even seen a tube radio as late as '74. The newest one I had was this little white plastic RCA AM clock radio from '68, actually I had two of them for a while.
Sort of off topic, but did Zenith ever make a table radio that was all transistor, but still used the old fashioned steel chassis... sort of the radio equivalent of the 25EC58 tv. |
Audiokarma |
#26
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Yes, Zenith made an all transistor AC-only table radio. I think the first one was from '66 ("N") line. I have a '67 ("X" line) AM/FM white plastic clock radio with an all metal chassis and plug-in transistors. In '68, PC boards were used. The first ones had a PC board attached to a metal chassis. By the early '70's, production had shifted to foreign countries and the insides looked no different than any other brand.
The early Zenith solid state console stereo's were on a metal chassis. The better ones retained the metal chassis through the mid '70's. |
#27
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i have owned several dated 79 and seen at least one 80
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i collect and restore vintage radio's,tv's,and ham gear. email for more info |
#28
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Quote:
I like puke-green better. I had a 12" B/W GE in 1971. It didnt work very long, and the handle that made it portable broke off while my cousin was borrowing it. Had a fairly good picture, and was the same puke-green and white. |
#29
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Technically, tube type 'radios' are still being produced---in the form of component stereo tuners...Magnum Dynalab makes hi-end (pricey!) tuners such as MD-109, MD-107 and others with triodes and dual triodes in the output circuitry.
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#30
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Quote:
I have yet to hear of any kind of circuit board problem in modern flat-panel TVs being caused by overheated transistors, ICs or other components, although I have read here in VK accounts of sets that have suffered major damage from being dropped; flat panels are especially vulnerable to such damage, which is almost always irreparable when the screen shatters. I see sets on eBay daily that are being sold as parts sets because of broken or cracked screens. I like the improved picture quality afforded by digital TV and FPs; however, given how fragile the latter are, I sometimes wish CRT sets were still being made. Those old sets were practically indestructible, unless they were dropped or thrown down a flight of stairs. My former stepmother (now deceased), in a fit of anger, threw a Silvertone b&w portable down the stairs of her house; the CRT did not implode. The set, miraculously, still worked quite well for six months after that. As well, my RCA CTC185 survived a fall off its stand a couple years ago; the only damage was a slight bend in the CRT shadow mask, which I was able to remedy with just a couple of sweeps across the screen with an old speaker magnet. Again, however, with today's FPs, one fall off the stand and the set is usually instant junk, the moment the set hits the floor.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. |
Audiokarma |
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