[Coco] Step down transformer for use in UK / Use on TV in UK

[Gene Heskett]

On Thursday 15 February 2007, Phill Harvey-Smith wrote:
>Quoting Marcus Vinicius Garrett Chiado <marcus.chiado at gmail.com>:
>> Hey, Steve! Congratulations for your CoCo 3. Mine may show up next
>> week or the next.
>>
>> Here in Brazil I do the same (backwards!) with british computers since
>> our voltage is 110 volts.
>
>The other option, if you are compitent with a soldering iron, is to
>remove the transformer, and modify the machine to run off a 12V DC
>supply, this is what I did with my CoCo3, as it came as just a bare
>board and keyboard.
>
>There are instructions on one of the CoCo sites for doing this which
>are pretty easy to follow.
>
>Cheers.
>
>Phill.

Its probably easier, and definitely prefered in terms of heat generation, 
to just remove all the psu parts, hang a 4 pin trailer connector out the 
back and hook it up to a std pc type switching power supply.  That 
removes 99.5% of the heat from a coco, any of them.  With a 2 meg disto 
kit, and a 63C09 in it, I can throw heavy furniture moving blankets over 
mine and get a 2 degree rise in temps after several hours.  FWIW, this 
would let you add a jumper or 2 on the coco3 and restore the missing + 
& - 12 volts on the cart connector.  I use the ground, plus 5 volts and 
the two 12 volt lines in the 4 pin hookup I'm using.

-- 
Cheers, Gene
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