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#1
04-30-2020, 10:30 PM
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is a 6GY6/6GX6 a good substitute for a 6BY6?
I'm going through my RCA CT-100 that came to me with someone's half-ass restoration...in going through and testing all the tubes I found that the 6BY6 Q synchronous detector had been replaced with a 6GY6/6GX6 at some point...while the set will demodulate lousy color showing that at the very least it is trying to work with this tube I don't know if this tube is an issue or if it is the lousy original resistors/peaking coils/alignment that is tripping me up and before I order a new tube or spend an hour digging through my unboxed used tubes I'd like to know if I need to...
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 
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#2
04-30-2020, 10:52 PM
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Just looking at the spec sheets, they have different characteristics, and just happen to have pinouts that might just work, sort of.
https://frank.pocnet.net/sheets/049/6/6GY6.pdf https://www.tubesandmore.com/sites/d...files/6by6.pdf Edit: at least a quick check of plate voltage would be worthwhile.
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#3
05-01-2020, 10:31 AM
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One of my tube substitution books (the one I could find) lists the 6BE6 and 6CS6 as subs for the 6BY6 so I've stuck a 6BE6 in for temporary. The 2nd video IF tube was wrong too, but atleast it was a type I had in the sorted portion of my tube stock.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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