#16
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Back in the Day/ color snow
Speaking of watching color snow. . . My old Pot smoking buddie used to come over to my house get loaded and watch snow for hours. . . He said he was inside a bag of cotton and the snow was cotton being picked and quickly thrown into the bag. . . I dont understand but I guess it takes all kinds. . . He actually ruined my TV by cranking the color and Contrast wide open. Finally after many many years he told me what he was doing. . . I would have shot him if I had known. I always wondered why my color and contrast were always out of wack. . .
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Barrymore's Conclusion. The thing that takes up the least amount of time and causes the most amount of trouble is sex . |
#17
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Re: Back in the Day/ color snow
Quote:
Turning the brightness control to maximum can damage the CRT permanently by causing the picture to "bloom" out of focus at maximum brightness; the tube will become gassy from the overload, and several other tubes in the set could be damaged as well. One set I read about in an old color-TV repair book some years ago was heavily damaged, and the culprit was a gassy CRT which caused a chain reaction; the resulting overload caused an arc on one of the set's PC boards, near one of the chroma demodulator tubes. The arc actually flashed across the base of the tube, cracking the glass immediately. There may have been, and probably was, even more damage as well, such as to the power supply, video amplifier circuits, etc. My best guess is the set was junked after the owner found out how much it would cost to repair it. Another dandy way of wrecking a color set in the early days through about the '80s or '90s was to turn the three G2 (screen) controls on the back of the set all the way open, then turn the set on. If you were lucky, all you did with most sets was blow a fuse or kick out the circuit breaker, but some sets weren't that well protected and could be ruined in a minute by running the screen controls (which controlled the brightness of the three electron beams in the CRT) at maximum. Today's microprocessor-controlled color sets have been made more or less "tinker proof" by putting almost all the service adjustments (except the focus control) in software accessible through a service menu, which itself is accessible only through a complicated series of keystrokes involving the front-panel buttons. The access sequence, and the meanings of the hexadecimal numbers in the menu itself, are normally known only to service technicians, which prevents set owners from altering settings they have no business changing in the first place. The focus control, although mounted (at least in RCA sets such as my CTC185 and others using that chassis design) on the rear of the set, has been made tamper-proof by making it impossible to adjust without a special hex-head tool available, again, only to qualified service technicians. Moreover, the back covers of all new color sets are now secured by fasteners which require, once again, a special tool not available to the average set owner. I believe the master G2 adjustment is on the rear panel of recent-vintage RCAs and possibly other makes as well, just above or below the focus control; it has the same type of tamper-proof hex-head shaft. BTW, I like your avatar--very cute.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. Last edited by Jeffhs; 02-27-2004 at 07:26 PM. |
#18
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Ruined TV
Only thing I remember (1962) was that the set was screwed up a lot and wouldnt last long. Sometimes when I came home to watch it the thing just wouldnt turn on.
I know very little about the inner workings but I certainly remember taking tubes in a grocery bag to the grocery store to use their tube tester and check tubes. I also remember how good the picture was on some of those old round tube TVs. The last one I had (1978) I let play for 4 years without turning it off. Every time you turned it on it would take longer and longer to get bright enough to watch so we just left it on, turned the sound down at night. then one day the power supply melted and smoke was every where. I remember the insulation on the wires was so hard and brittle that you couldnt move a wire without shattering the insulation. This was before we let it play so long. I was young and foolish and never thought about consequences. That TV was a RCA, dont remember the model but its picture even by todays standards was spectacular. I certainly understand the appeal of these early birds.
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Barrymore's Conclusion. The thing that takes up the least amount of time and causes the most amount of trouble is sex . |
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