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  #31  
Old 07-08-2016, 01:37 PM
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But there where any 100% tube or hybrid sets that where relaible?
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  #32  
Old 07-08-2016, 01:53 PM
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Originally Posted by Telecolor 3007 View Post
But there where any 100% tube or hybrid sets that where relaible?
Compared to other tube or hybrid sets, some brands were certainly more reliable than others. But compared to 100% solid state sets, none of the tube sets were anywhere near as reliable.

In the days of tubes, it was expected to have a TV repair person out to service a set at least a couple times a year, if only to replace worn out tubes. The heat from the tubes took its toll on other set components, as well.

Once semiconductors were advanced enough that 100% solid state TVs were available, you got rid of tube wearout/burnout and a lot of excess heat baking the other components and circuit boards, giving a HUGE boost in reliability overall. Sure, individual models would have their own reliability issues (like safety caps in Zeniths, or bad "griplets" in GE sets), but overall, TV sets got much more reliable after the transition away from tubes.
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  #33  
Old 07-08-2016, 03:35 PM
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But if nothing was broken, except a valve, you could replace the valve yourself, no?
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  #34  
Old 07-09-2016, 07:42 PM
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Sure. And many people did just that. Probably a lot of the same people who did their own oil changes and tuneups on their cars. Or their own home repairs.

Everybody else called the TV repair shop, of which there were 2 or 3 in any decent sized town. Their numbers began to decline shortly after the switch to solid state began, and nosedived after cheap foreign made sets started being dumped in the US, shifting the "repair vs. replace" economics dramatically...

Last edited by N2IXK; 07-09-2016 at 07:46 PM.
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  #35  
Old 07-09-2016, 08:12 PM
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Many US drugstores had tube testers, so you could bring in your tubes for testing and buy replacements on the spot. Here's one for sale on eBay:

http://www.ebay.com/itm/Vintage-1950...-/391365679772

In the 1950s, many pamphlets and short books were published describing how you could fix your TV by replacing tubes. They included photos and descriptions to guide you in which tubes to check.

TVs can have many other problems, of course, but tube replacement was probably the most common service procedure.

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  #36  
Old 07-09-2016, 08:26 PM
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Quote:
Originally Posted by Telecolor 3007 View Post
But there where any 100% tube or hybrid sets that where relaible?
Zenith hybrids can be extremely reliable, case in point my 16" chromacolor from '73
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  #37  
Old 07-10-2016, 10:57 AM
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My Heathkit GR-180 19 inch set was almost perfectly reliable for 20 years. It had only
one failure of anything, at about the worst possible time in 50,000 years of humans:
5 hours before the first man stepped on the Moon, the CRT developed a green gun heater-cathode short.

Despite using a VERY rare small-pitch mask CRT I found one at a shop
less than 3/4 mile from my house and got it installed in time.
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  #38  
Old 07-10-2016, 03:46 PM
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Push back the color TV reliability date to 1968 and 1969. In those years, Sony introduced first the KV 7010UA 7 inch Trinitron followed by the 12 inch KV 1210U. Both sets were were rock solid. We purchased both models as new in those two years and both sets worked perfectly without a single service call until my wife mistakenly gave both away by mistake. That was in 2006. We were able to find replacement recently.

I still have my original purchase 1973 Sony KV 1722 17'inch Trinitron. Still works today, never had a service done to it. 43 years of service free operation. I call that fantastic reliability.

1968-1969 Sony Trinitrons were also the exception. And really as good as they were in 1976, Zenith hybrids also the exception, RCA's XL-100 was also a pioneering uber reliable RCA set in the 1971-1972 time frame. Zenith's ChromaColor and ChromaColor II were far and away the finest, most reliable US built Color TV receiver ever made. And yes, the KV 1722 was Sony's very finest set.
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  #39  
Old 07-13-2016, 04:03 PM
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I guess "R.C.A." color sets from 1965-1966 wheren't so reliable (but the did need more then tubes replacement?).
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  #40  
Old 07-13-2016, 07:30 PM
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RCA sets developed problems with the tube sockets due to heat damage where they were mounted on the PC boards.
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  #41  
Old 07-13-2016, 08:28 PM
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But other sets from the same period developed the same problem.
Electronic tubes that generate heat installed on p.c.b. isn't the best ideea.
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  #42  
Old 07-13-2016, 08:56 PM
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Originally Posted by Telecolor 3007 View Post
But other sets from the same period developed the same problem.
Electronic tubes that generate heat installed on p.c.b. isn't the best ideea.
RCA's had issues with solder joints and other things failing from the heat. Zenith, Packard Bell, and Setchell Carlson at least used point to point wiring in the mid to late 60's (Zenith kept at it till mid way through the 70's) and I'd say their color TV reliability was comparable to an average monochrome set of the period...I'd say that you could get a GOOD brand tube color of comparable reliability to an average monochrome set by 1964.
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  #43  
Old 07-13-2016, 10:18 PM
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PC boards and tubes, don't mix. Tube heat and PC boards the issue.
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  #44  
Old 07-13-2016, 10:51 PM
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PC boards and tubes, don't mix. Tube heat and PC boards the issue.
Like those PC boards in the Tanberg tube reel to reel machines would really cook & warp!
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  #45  
Old 07-14-2016, 02:31 AM
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What menat relaibility for an avarage tv set in 1964-1966?
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