[sdiy] Re: old switch mode supplies, was AC Adapter -

[dragon.servicing]

Hi,
well I think a lot of the capacitors used in the older switch mode 
supplies are now needing to be changed.
using replacement caps rated at 105deg and that have low esr is a good idea.
I have had Atari supplies where changing the caps has got the supply 
working again.
but I have had supplies where the fault seems to be very hard to locate.
and Please be careful about the high voltages that can be present.
regards Peter


Ken Elhardt wrote:

> 
> While I still have tons of Apple II stuff laying around, I've never
> had an Apple III.  I however have 3 Apple III power supplies because
> about 25 years ago, a computer store had a bunch and were selling them
> relatively cheaply.  I'm using one to power my Atari ST after its own
> supply blew.  I was considering using the Apple III supply for my Moog
> resonator, but after a few minutes of it turned on, it suddenly
> smoked.  Same thing happened to another Apple III supply several
> months ago.  So I'm down to the one on my Atari ST.  Those supplies
> apparently don't age well.
> 
> -Elhardt
>