Quote:
Originally Posted by miniman82
Mine actually has faint banding when showing blank video, I think it's horizontal ringing. Must be something with the design of the chassis, because the CT-100 doesn't do that.
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Yeah sure seemed like that to me. With blank video I put a 1500pF cap across the 1st video amp and that got rid of it. I put the cap across the 2nd IF and the vertical white line came back. So I figured the noise/ringing was getting in there somehow. Or may it is my alignment.
So after being bummed about that for a while, I realized I have been feeding all my video to the 21CT55 through my DVD player and then through a cheap RF modulator. This has worked just fine for my 1940s BW sets for quite a while. Even my VA62 test patterns were going into the DVD video input to get to the set. I decided to try feeding a blank video from my VA62 through its RF output. The vertical white line was gone!
So my vertical white line has been in the RF I was feeding it, not in the set. I know that does not make sense if I could put a cap across the 2nd IF and have it come back, but the line is not there when I drive it with the VA62, so yippee, I hope.
What is the best RF modulator to feed signals to a 21CT55?