RCA CTC4 Seville Restoration

[Phil Nelson]

Originally Posted by Hagstar

One cannot inject ordinary video into a CTC4

Well, yes and no. The required voltage is more in the neighborhood of 2+ volts, not 16 volts, but in any case, a "standard" video signal of approximately 1 volt may not work well in a CTC-4.

Fellow VKer ChrisW6ATV remembered that the Video Drive output from a Sencore VA62A can be set as high as 3 volts, and he got good results from injecting video from that device. (This essentially accomplished what I was trying to do by building a video preamp from the old RCA plans.) I tried that method, and confirmed that it works. More details in this other CTC-4 thread:

http://www.videokarma.org/showthread...259995&page=25

The Sencore VA62A has a rear jack to accept an external video source, so you can connect, say, your DVD player's video output there and use the VA62A to inject video to the CTC-4. Which is useful for diagnosis, but I doubt you'd want to use such a clumsy setup for everyday watching.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html