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

[George Ramsower]

 I should have looked more closely. Yup, your right.

----- Original Message ----- 
From: "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
>>>>
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>>>> http://five.pairlist.net/mailman/listinfo/coco
>>>>
>>>>
>>>
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