Later on when you monitor the video outputs with a color bar signal input, here's the challenge: check for twice the red drive as the green. As shown in the link of a CTC2 driving a good tube, the red drive (bottom) is about 60 volts vs about 30 on the green video.
http://home.att.net/~pldexnis/CTC2_h...22-60R-30G.jpg