[Coco] CoCo 2 Factory Composite Video RE'd

[Zippster]

Hi Gabriel (and all),

I’m going to put up some pictures of the 2 types of CoCo 2 RF modulators that
I know of tonight.  I will be making 2 different versions of the board (circuit will be the same).

The motherboard pinout is different for the vertical modulator and the dimensions/shape of the 
composite board will be as well.  I don’t want to block access to any of the other chips on the
board, especially the 6847 as I’m doing a remake of the Lowerkit next that will plug into that socket.

Bare pcb’s, kits, assembled, whatever people want is fine.  I’ll try to come up with prices later today.

Remember, the RF modulator does need to be removed for this to be installed.

- Ed


> On Dec 15, 2014, at 2:14 PM, Gabriel Holland via Coco <coco at maltedmedia.com> wrote:
> 
> Didn't know there would be kits and fully assembled.  I guess I should clarify - I would like a fully assembled one, please. I have the vertical RF can, if that makes any difference.
> 
> 
>     On Monday, December 15, 2014 3:01 PM, Al Hartman <alhartman6 at optonline.net> wrote:
> 
> 
> Marty Goodman wrote two articles with the circuits for tapping a Monochrome 
> and Color Monitor output on a Coco 1.
> 
> I linked to them in the CocoPedia: 
> http://www.cocopedia.com/wiki/index.php/Marty_Goodman
> 
> There is also Dennis' TVBuff, the manual for which is in the MM archive.
> 
> -[ Al ]-
> 
> -----Original Message----- 
> From: Zippster
> 
> I know you can tap, invert, and amplify the Luma signal for a monochrome 
> display.
> Two transistors and a few resistors, and three leads, Luma, +5v, and ground.
> 
> The Y output from the 6847 is an inverted Luma with composite sync.
> 
> - Ed 
> 
> 
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