#31
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Also, let's not forget it was just about the only set besides the CT-100 to have full I/Q color demodulation. I have one and the picture difference is very noticeable, especially with pastel colors.
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#32
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I have one: an RCA TM-10 using a 15GP22. Restoration is underway, but this is not a trivial project (for me, anyway), so it's taking a while.
http://antiqueradio.org/RCA_TM-10_15GP22_Monitor.htm Phil Nelson Phil's Old Radios http://antiqueradio.org/index.html |
#33
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One less Rube Goldberg-esq method I've heard of that was supposedly successful in fixing a gassy 15GP22 was to run the filament continuously for over a year to boil the crud off the cathode and cause the gas to move more so as to get it to hit the getters and be absorbed....I'm tempted to try it on my gassy 21AXP22.
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#34
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I worked on the CTC-131 and it was the first to have full wide I. The CTC-121 appeared a year earlier but was not wide I. The CTC-131 also has an auto kine bias set up. Which does track low lights over time.
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#35
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Quote:
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Audiokarma |
#36
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That's a nice General Electric tricolor receiver! Back around 1970 I had one of these in the goodwill repair shop in as a DONATION! We got it working very well and sent it out to be resold for $100.00. The 15gp22 was still under vacuum! It was the first and last one of that receiver I ever saw come through the door. Someone actually bought it.
I wish I knew then what I know now- I'd have paid the $100.00 to rescue it. But then who wouldn't. Pallophotophone |
#37
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Correct me if I am wrong, but I think it is normal for the getter flash in a vacuum tube to be used up over time, not specifically indicating a loss of vacuum.
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#38
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You often see faded/discolored getter spots on power tubes (like horizontal output tubes) that have seen many hours of hard service. |
#39
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Absolutely. 7591, 6L6GB, 6550, you will often see the getter flash that looks kinda like a cola color. But I have had many that still worked just fine albeit a little weaker than NOS but still worked fine...
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#40
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Doesn't the CTC-133 also have full I bandwidth?
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Audiokarma |
#41
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Quote:
I had a CTC101 TV (the one with the infamous flyback) and a CTC121.
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#42
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