[Coco] CoCo Map, and CoCo 3 Voltage Regulator heat sink

[Gene Heskett]

On Thursday 09 April 2009, Andrew wrote:

>All,

>

>I am replying to these two items, but I don't have the originals inline

>due to that lovely "--" bug that Thunderbird has (this is actually

>documented - but has yet to be fixed for the past several years for some

>reason).

>

>Anyhow...

>

>Regarding the CoCo Map: I just added myself, and it all seemed to work

>fine in FireFox 3 under Ubuntu (so I don't think there is an "IE Only"

>problem?)...

>

>Regarding the regulator (specifically, a small switch-mode PSU):

>

>You might try looking around at All Electronics:

>

>http://www.allelectronics.com/make-a-store/category/480/Power-Supplies/1.htm

>l

>

>and/or Electronic Goldmine:

>

>http://www.goldmine-elec-products.com/products.asp?dept=1109

>

>If you haven't already - EG seems a little sparse on there PSU

>offerings, so AE might be a better choice. I don't know off-hand what

>the CoCo's needs are for a PSU (can someone chime in?). I would imagine

>that +/- 12VDC and +/- 5VDC at some amperage for both (what, I don't know).

>

>Both of these electronics places are good, but there are others. If I

>run across something elsewhere I will post it...

>

>-- Andrew L. Ayers, Glendale, Arizona


One slim possibility, I haven't checked to see if it would fit, is to use the 
psu that was originally made for the TI99-4A, I think it has all 3 needed 
outputs, and with a little plastic surgery, it might fit to the left of the 
motherboard in the coco case.  The surplus market was flooded with those quite 
a few years back. I'm sure it has plenty of juice to do the job too.  However, 
in my case as I have an MPI, it was easier to hook up the AT supply to both.  
Heck, the TI99/4A board has probably enough power to run everything.  I have a 
spare psu someplace, but I also have a TI99/4A too, so I hesitated to turn 
cannibal.  As I'm also running about 5 (3 floppies, 1 hard, one cdrom) drives 
from that AT supply, the TI unit might let the smoke out with that heavy a 
load.  As it is, the coco and the mpi serve to stabilize the AT supply well.


>--

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-- 
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)
The solution of this problem is trivial and is left as an exercise for
the reader.