[Coco] CoCo 3 to RBG...

[Bob Devries]

Steve said:

> Some of the foil & plastic stuff the shack covered the bottoms of the 
> pcb's
> with would be just the ticket but I'm not tearing up another of my coco's
> to get it and I have never seen the stuff for sale.

I wonder if you could make your own plastic coated shielding using one of 
the cheap laminators that are now available?

And no, I've never tried it, I don't have a laminator, so I don't know if it 
works.

Regards, Bob Devries
Dalby, QLD, Australia


----- Original Message ----- 
From: "Steve Batson" <steve at batsonphotography.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Thursday, July 21, 2011 7:04 AM
Subject: Re: [Coco] CoCo 3 to RBG...


> Mounting aside, have you tested the board and got it working with the CoCo
> 3 RGB out fed into any of the ports? If I do find something before you,
> I'll let you know.
>
> ----------------------------------------
>
> From: "gene heskett" <gheskett at wdtv.com>
> Sent: Wednesday, July 20, 2011 1:52 PM
> To: coco at maltedmedia.com
> Subject: Re: [Coco] CoCo 3 to RBG...
>
> On Wednesday, July 20, 2011 04:34:58 PM Steve Batson did opine:
>
>> Gene,
>>
>> I didn't even see that about on board connector only handling
>> 31Khz...Ok, well it looks like I need to go with my original plan and
>> build the ribbon with a 15 Pin D connector. Not too excited about that
>> due to the very small amount of space to work in on the connector. I'm
>> almost tempted to build some type of small project board where I can
>> mount connectors to the board and do all the crosswiring on it, seal it
>> up in a box and then be able to use standard, straight through Ribbon
>> cable on the coco side and standard straight through VGA cable on the
>> output. I couldn't find my soldering iron, so I ordered one last
>> week...should be her this week along with a 15pin D connector. I just
>> picked up a VGA cable the other day for about $5, but it doesn't look
>> like I'll need it, so I'm seriously thinking about just cutting it and
>> splicing it to the ribbon cable from the Coco. At this point, I want to
>> see it working before I invest any time or more money in making it
>> pretty.
>>
> I went back, fired up my magnifying lamp, and re-read it a few more times.
>
> The 8 pin connector behind the DB15 (P10) is P11, the EGA/CGA 5 pin is P3,
>
> and the text says 15khz and up for P3, P10 and P11. That then tells me I
> miss-remembered it, and that the 8 pin connector should work.
>
> Then on checking fit, it's too big to fit it internally to a coco3 with a 
> 2
>
> meg kit in it, then its also too big front to rear to fit in the right 
> rear
>
> corner of the upper case even w/o the 2 meg kits buffer pcb. So I grabbed
> a white ash plank about .125" thick that was planed smooth on one side, 
> and
>
> ripped it up to make a couple slices of bread to make a sandwich with the
> board in the middle. An 1/8" tall standoff under the board, and a 3/4
> above the board should space it about right. I cut a notch in the top of
> to get to the pushbuttons, but I will probably mount it and adjust the 
> pots
>
> if needed & then cover them up.
>
> The remaining question you may be able to answer & has to do with how hot
> that chip with the heat sink glued to it gets. In other words, do I need
> to drill some vent holes in the cover right over the heat sink? I intend
> to cut some thin alu and see that its grounded through the board mount
> screws to reduce the ingress/egress of digital noise before its assembled
> for the final time.
>
> Some of the foil & plastic stuff the shack covered the bottoms of the 
> pcb's
>
> with would be just the ticket but I'm not tearing up another of my coco's
> to get it and I have never seen the stuff for sale.
>
> Cheers, gene
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Just weigh your own hurt against the hurt of all the others, and then
> do what's best.
> -- Lovers and Other Strangers
>
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