On Nov 7, 9:49 am, Sam Goldwasser wrote:
I did some more experiments using the composite and S-video outputs of
a Cyberhome CH-DVD 300S DVD player feeding an RCA ColorTrak 2000 (circa
1984) TV as well as a small LCD monitor.

Best (lowest color noise): Composite output.

Next best: Direct Y to C connection using $3 eBay S-video adapter. (Virtually
the same with home-built adapter that wasn't well shielded.)

Worst (highest color noise): 470 pF between Y and C.

The B/W resolution seemed similar for all three. There was almost no color
noise with the composite output. The color noise shows up at edges and
especially with lettering like titles and credits, or where there is fine
detail.

Comments?

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I thought about that more after I said capacitors. The ideal situation
would be to use a summing amplifier. Nearly as good would be
converting the chroma to current output rather than voltage using a
transconductance amplifier and then resistively sum the chroma and
luma. What exactly was in the home built combiner? Just a 'Y' cord?

None of that touches digital. HD across the LAN cables works great
with the 'TV' computer connected DVI to a 50" DLP.

GG