[Coco] *COOL* Look what I found! (VideoMod for CoCo2)

[N8WQ]

Hi George,
The last time I looked the Color Computer (1, 2, or 3) didn't have any 
surface mount components. LOL
The circuit has 22 parts, which includes one variable capacitor and one 
potentiometer.
If you look on page one you can read "SMD technick."
He clearly shows the circuit raised on top of the rf video modulator.

Alan Jones

-- 
N8WQ - Canal Winchester, Ohio
http://exwn8jef.googlepages.com/home
http://n8wq.blogspot.com



George Ramsower wrote:
>
> ----- Original Message ----- From: "N8WQ"
>
>> Hi Fedor,
>> That looks like a SMT (surface mount) component layout. A SMT pc 
>> board would have to be made or you could use what us home brewer's 
>> call "manhattan style" construction. Or we could translate the 
>> project to "through hole" components. It would be nice to see the 
>> schematic though. LOL
>> The BSR14 is a NPN general purpose amplifier.
>>
>> Alan Jones
>
> He's showing where on the RF modulator to make connections. The ckt he 
> built only has about three or four parts on it.
> Usually this mod only require a transistor to invert and amplify the 
> video that goes into the modulator.
> Although I can't read what he's said, it looks to me to be an 
> installation guide for the little ckt. This is probably why there's no 
> schematic of the actual ckt.
>
> George
>>
>>
>>
>> Fedor Steeman wrote:
>>> Hi all,
>>>
>>> While going through the huge lot of copied CoCo Manuals I inherited 
>>> from
>>> Michel Collette, a former Dutch CoCo-society regional coordinator, I
>>> discovered the following schematics for making a video buffer mod for
>>> the CoCo2, enabling a CoCo2 to be coupled up any television or video
>>> equipment with a composite video input:
>>>
>>> http://www.steeman.dk/CoCoManuals/VideoMod_(KoenVaartjes).pdf
>>>
>>> How cool is that!?
>>>
>>> It is all in Dutch, written by someone called Koen Vaartjes, but if 
>>> people
>>> are interested I could translate, clean it up, perhaps redo the 
>>> schematics
>>> in a graphics editor and put it up on a webpage!
>>>
>>> Some of the equipment i inherited from Michel Collette actually 
>>> included a
>>> CoCo2 with this video mod. I tried it out when I first discovered it 
>>> and it
>>> worked flawlessly then. After having transported the CoCo one time, 
>>> however,
>>> something went wrong, because after that all I got was a black 
>>> screen and no
>>> sound. I believe there must be a loose contact somewhere, because 
>>> every now
>>> and then when I try it, it works again.
>>>
>>> The final page looks like a schematic of a scart cable (
>>> http://en.wikipedia.org/wiki/Scart) that is widely used in Europe at 
>>> least.
>>> I do also have a modified SCART cable that can be used to hook up the
>>> RGB-output of a CoCo 3 to a normal television with a scart input. 
>>> That too
>>> once worked, but not anymore. Maybe if someone could help me 
>>> understand the
>>> schematic, and figure out what wires of a RGB-cable should be 
>>> connected to
>>> what pin of the scart, I could try to fix the cable or make a few 
>>> more for
>>> anyone interested... This would mean that a CoCo3 could be connected 
>>> from
>>> the RGB output directly to a television with scart input.
>>>
>>> Cheers,
>>>
>>> Fedor
>>>
>>> -- 
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> http://five.pairlist.net/mailman/listinfo/coco
>>>
>>>
>>
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