14 Jan
2007
14 Jan
'07
1:38 p.m.
Grant Stockly wrote:
At 10:43 PM 1/13/2007, you wrote:
The original power supply for the 680 was WAY undersized...
You can get a pretty good idea of the transformar rating from
the size. (or weight) Look through the catalogs for something
of similar size and use it's power rating to calculate how much
the original transformer could have provided.
In the 680 almost all of the load was on the 5 volt supply.
(and +9 unreg for option cards)
Are you doing an exact recreation or using more modern parts?
joe
On 13 Jan 2007 at 23:51, woodelf wrote:
I'm talking about the 680. It has to be around 25-30w. Its
2.4"x2.2"x2"
I wanted to do switchers, but there is hardly any room for one.
Grant The S-100 power supply if I remeber right had
lots of amps.
20+ amps on the +8 line I think. Only a few amps on the +-12? volts.
On the Altair 8800 the power supply is pretty anemic, as I recall.
OTOH, the one on my Integrand box is one big hunk of iron.