[Zenith6S321]

My CT100's 15GP22, like most, is unusable. Until we are able to rebuild it I want to be able to restore and run my CT100. As Don proposed at the 2013 ETF presentations, being able to drive a VGA monitor would let us use our CT100s with bad 15GP22s. Here is my attempt to get a 21CT55 CTC2B chassis to drive a VGA monitor. My current design clips onto existing points in the CTC2 chassis with no changes required to the chassis. The CRT R, G, and B grid signals are converted to 1V peak video driving 75 ohms. A horizontal yoke lead and a spring around the vertical output tube provide the sync signals that are used to form the negative going composite sync signal. Most VGA monitors, like my CRT based NEC FE950 do not accept the CTC2 interlaced video. I use a Jamma Boards GBS-8220 to scan convert/up-sample the interlaced RGBS video to progressive scan VGA RGBHV. Here are some pictures.