29 Aug
2001
29 Aug
'01
2:02 p.m.
On Wed, 29 Aug 2001, Rich Beaudry wrote:
Date: Tue, 28 Aug 2001 21:53:29 +0100 (BST)
From: ard(a)p850ug1.demon.co.uk (Tony Duell)
Subject: Re: S-100 Power Supplies: thanks!
If you get one of those, Rich, get it on a returnable basis. Some S-100
cards are really picky about the voltage that the regulator chip sees
and if not high enough will not function.
- don
Have you considered winding your own transformer.
Uhhh ... hadn't thought of that! :-)
In the UK we can buy 'transformer kits'.
Did a quick search of a couple of distributors, but no luck yet ... I'll
keep looking, though!
According to my calculator, 6.3V * sqrt(2) = 8.9V
or thereabouts. Since
the 8V line is unregulated anyway, I would think you could start with a
6.3V transformer. Can you really no longer buy valve heater transformers???
!@$#!@$!!~!!!!
I found a couple of 6.3V transformers, one at 8.8A, one at 12A ... I must be
going blind... I don't think they'd power my 21-slot backplane, but I do
have a couple of smaller ones that would probably be just fine...
Rich B.