[Coco] SVideo ?

[gene heskett]

On Monday, November 14, 2011 07:52:57 AM Frank Swygert did opine:

> S-video won't work directly from a CoCo. The best you can do is
> composite output, which requires an adapter (unless you have one of
> those rare school model CC1s, I don't recall if RS made a CC2 for the
> network controller). Some of the non-Us models had composite built in,
> maybe the UK models? I think the Aussie models did.
> 
> What kind of cable are you using? The best I ever got from a CC2 was by
> using a cable TV cable instead of the composite cable that came with
> it. You can get a cable (forget the connector name off hand!) to RCA
> jack adapter for the CoCo side, then just screw into the cable TV input
> on the TV. That's about as good as composite -- the heavy shielded
> cable works wonders! You could try that with your composite output, use
> the RCA adapter on both ends of the cable. Should improve quality a
> little.
> 
However, the OP asked for s-video, and I see no real roadblock to doing it 
on a coco 1 or 2.  S-video can be obtained from the luminance and color by 
never mixing them, or picking off the signals before they are mixed in the 
rf modulator.  In that manner, the filtering needed to separate the chroma 
from the luminance is bypassed, giving a luminance image that is several 
times sharper than the composite rf can ever offer.

To me its a bit sad that no one made up a kit to do this, the only reason 
being that S-video is at least 10 years newer than the coco's.

> ------------
> Date: Sun, 13 Nov 2011 21:50:39 +0000
> From: Phill Harvey-Smith<afra at aurigae.demon.co.uk>
> 
> Has anyone managed to generate svideo from a CoCo 1/2 as I wat to try
> and improve  on the composite video output I'm using currently.


Cheers, Gene
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