[Coco] Video adapters

[Chester A Patterson]

Hi,

I cannot speak for anyone else, however I certainly would be MOST interested
in an arrangement that has BOTH adapters functioning at the same time.

I believe I'm on Roy's waiting list, but I'm in no hurry. I will also order
Chris' S-vid adapter if the fix can be implemented. Many thanks!

/Chester

-----Original Message-----
From: RJRTTY at aol.com [mailto:RJRTTY at aol.com]
Sent: Wednesday, April 26, 2006 10:17 PM
To: coco at maltedmedia.com
Subject: Re: [Coco] Video adapters


In a message dated 4/26/06 10:56:47 P.M. Eastern  Daylight Time,
chawks at dls.net writes:
>    Since they both  connect to the Coco3's RGB output, probably not.
>But, If someone wants to  build an RGB 'Y' cable, we can try it.
>Right, Roy?

>---End  reply

>Christopher R. Hawks
>HAWKSoft

You can do that BUT  the input resistance of my converter is 50 ohms.
If Christopher's device also  has a low DC resistance (50-75 ohms) then
one or the other must increase it's  resistance to avoid overloading the
outputs in order to use them  simultaneously..
By the way Chris, if your converter  doesn't have a 50-75 ohm
input resistance on the RGB signal lines (not on the  sync lines)
then try applying this amount of parallel input resistance and  see
if the image improves.   The output circuits where designed to  drive
this type of load.

Roy