[Pete Deksnis]

Originally Posted by Phil Nelson

Perhaps the CTC-4 is similar to the CT-100/CTC-2B, where injecting video requires that you add a little video preamp. This article describes the preamp that I built following Pete Deksnis's design:

http://antiqueradio.org/VideoAdapter...Television.htm

Phil Nelson

Phil,

The CTC4 is actually very different from from a CTC2: the '2' has seven stages of i.f. with five on the main chassis and two on the tuner (it's a cascode stage).

The '4' has three i.f.stages. Where the '2' i.f. is flat across the luma-chroma domain, the '4' rolls-off BIG time after 3 MHz.

The '4' first video amp compensates for the tilted bandpass characteristic by boosting the chroma domain BIG time.

So, unless video that has been altered to match what comes from a '4' i.f. strip (and its detector) is injected into the '4' video stage, I suspect what you see is probably understandable.

Pete