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Don't forget to try the 6GH8's first - they'll check fine on a tube tester, but fail as a color burst amp/oscillator. We used to use those RCA's to actually test used 6GH8's - if it worked in an RCA color circuit, it was considered good.
Their use in color circuits was probably a stretch - they were originially designed as horizontal oscillator tubes. There's a big difference in 15,750 Hz and 3.575945 MHZ!
Cheers,
__________________
Brian
USN RET 22YRS (Avionics/Cal)
CET-Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
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