[miniman82]

I tried doing this with a Philco 17MT80, but there are some issues.

First, there is a luma delay in sets to make up for the time shift associated with processing the color signal. It must be matched to each set because each decoder is unique, or the color information will not correctly overlay the luma in the picture- it will be offset to one side or the other.

Because of this if you inject Y after the detector and R-Y/B-Y after the decoder, you must also make a custom Y delay so the signals coincide at the CRT.

To add to the problem, there seemed to be a big difference in the level of signal coming out of my DVD player. Red was a much stronger signal than blue was, which meant there will be some amplification required in order to get the colors correct. But if you do that, there must also be another delay line (on the red signal) because the amplification of the blue information will cause it to arrive slightly later than red if you don't.

So as you can see, it's not just a simple matter of hooking up some cables. Not that it couldn't be done, just that it would be a lot more involved than you first think.