[Coco] CoCo 2 Factory Composite Video RE'd

[Zippster]

Hi Everybody,

I’ve successfully reverse-engineered the factory composite board found in
a CoCo 2 I purchased on ebay.  This board is a direct replacement for the RF modulator.
It requires no modifications to the case, and uses the channel switch to select B&W or COLOR.

It seems to have very good output - I’d say better than the reference circuit from the 6847 data sheet.
It’s a more involved circuit with voltage regulators on-board and is AC coupled.

Pics of the factory and re’d prototype can be seen here for those who are interested.

<https://sites.google.com/site/thezippsterzone/coco2-composite-board-2 <https://sites.google.com/site/thezippsterzone/coco2-composite-board-2>>


- Ed