Quote:
Originally Posted by maxhifi
Per very old posts, I added the attached circuit to my CMC TV, a rather standard 17" B&W table top set from 1958 or 59.
It evens out the blacks, but when brightness is high, there is now sometimes a bend in the middle of the picture. It appears more with dynamic images than with static ones. I wonder if this would be improved by reducing the value of the 0.1uF capacitor, or if maybe some sets are unsuitable for this mod.
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So getting back to your sync disturbance issue - your sync is being pulled off the bottom of L7 with very little isolation from your DC restoration diode. So it's no surprise that there is some push-back loading effect on the sync when the diode conducts heavily. I'd be curious to read the thread that this method your using originated from.