Quote:
Originally Posted by old_tv_nut
I think I've reached the limit of my knowledge, especially without seeing the whole circuit.
Meanwhile,
1) How touchy is the brightness control? Does it have alot of excess range? This will give you an idea of how much the video signal swings compared to the brightness control voltage.
2) Can you cut off the blacks with the brightness control? If so, no adjustment to its voltage range is required, and you may just have to back off contrast (video drive p-p) to make sure bright pictures don't overload things.
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0.5) Thanks for paying attention to this thread, I appreciate the advice and interest. If you are interested, I did upload the circuit to dropbox, here
https://www.dropbox.com/sh/bm7e4on8q...tAU050hPa?dl=0
1) Not really all that touchy, but only the top of the range shows a good picture. The picture tube is not super strong though, so this is not a big surprise.
2) With the brightness control full counterclockwise, there is no image visible on the screen at all.