Powering up a 20-year old MicroVAX II
pete at dunnington.plus.com
Mon Mar 2 18:06:45 CST 2009
On 02/03/2009 18:37, Tony Duell wrote:
> While I beleive there are SMPSUs that fail if turned on with no/insufficient
> load, I've yet to meet one.
The small switcher in DEC's TK50 tabletop box does exactly that. I got
to sort through a pallet-load of the things once, and got to keep
several that looked repairable. Well, they were, but at least two had
to be repaired twice because I forgot to hook up the minimum load board
that the TK50-AA box usually has.
However, I have to admit that's the only time I've been bitten in that
way, and the PSU in a BA23 certainly shouldn't get too upset by a
no-load situation. I'd guess it's just lost a mains filter cap.
Pete Peter Turnbull
University of York
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