[Coco] Video adapters

[Mark Marlette]

We will try it at the fest. :)

Quoting Chris Hawks <chawks at dls.net>:


> ---Reply to mail from RJRTTY at aol.com about [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.

>

>    The input resistance of the color lines on the RGB to S-Video adapter

> is actually 150 ohm (easier for the voltage divider to drop the signal

> down to the AD724 spec). So a 'Y' cable might work.

>

> ---End reply

>

> Christopher R. Hawks

> HAWKSoft

> -------------------------------------------------------------------------

> The only "intuitive" interface is the nipple.  After that, it's all learned.

>    -- Bruce Ediger, bediger at teal.csn.org, on X interfaces

>

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