Composite video adapter for RCA CT-100 TV

[Phil Nelson]

A direct video adapter for CT-100 televisions is old news for regulars at the Early Television Foundation conventions, but this article may be interesting nonetheless:

http://www.antiqueradio.org/VideoAda...Television.htm

The article includes a presentation that Pete Deksnis gave at the 2009 ETF convention, describing his improved design for the adapter shown in a 1956 RCA Broadcast News magazine.

A couple of years ago, I had built an adapter to the 1956 design, and I recently updated my adapter with Pete's improvements.

Pete's material is well worth a read if you're curious about this topic. The article also includes some ramblings about the version that I built.

Regards,

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

[rcaman]

i would love to be able to use something like this on my ctc-9 and ctc-10 anybody here know how to build one. thanks steve

[wa2ise]

You could do one better if you make an S-video input. If you have a source of S-video, like a Channel Master CM7000 converter box. Then you would not have any cross luma-cross chroma degradation. You need to find the place in the TV set where the composite signal is separated into luma and chroma, where it feeds the luma delay line, and chroma decoder, and inject a buffered and amplified luma and chroma at those points. S-video on a CT100 should look really good, with the real red, green and blue in the CRT.

I modified a CTC100 diagram showing how I'd build it. Needs a 2nd 6CL6 tube. You need one for luma, and a separate one for chroma. I haven't built it, don't have a CT100, so YMMV. Use a pair of the interface circuits http://www.antiqueradio.org/art/RCA_...pter_Plans.jpg to feed the 6CK6 tubes in my diagram. Though, for the chroma interface circuit, omit the DC restore diode, and change the bias so the chroma 6CL6 doesn't clip.