Quote:
Originally Posted by 63bird
Where is the blanking tube located? I can't find it on either schematic that I have. I'm not sure what one is or does.
TV repair makes amplifier repair look easy.
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I dont have a manual so not sure. It will be a small tube &
dual function. Probably a 6GH8 or 6KT8 If you have a Sams look along under the video amp tubes thats where they usually put it. It may
use diodes instead. What it does is turn off the video during retrace.
If its not turned off you get lines & often strange symptoms.
Whatever you are using may also be adding to the problem.
DVD's VCR's, Digital CATV were not designed for the old sets.
By the mid 70's almost all roundies were gone in our area.
https://en.wikipedia.org/wiki/Horizo...nking_interval
There is more to know than in audio but its a good start, more
than most have !
73 Zeno