[time-nuts] HP Z3805A internal PSU questions

[paul swed]

Tim
Yes indeed the supply can be a problem.
They do seem to fail over the years.
I lost one of the brick converters. It was easily replaced with a
reasonable alternate.
Also there is essentially a preregulator that can have issues. None of this
terribly hard to fix or get around. Especially if you do not intend to run
it on a single battery supply.
Regards
Paul
WB8TSL

On Tue, Sep 29, 2020 at 8:22 AM Tim Tuck <timt at skybase.net> wrote:

> And as soon as I posted this I found what I was looking for  on KO4BB's
> website - I forgot that the z3805 is basically the same as a Z3801.
>
> So the fault finding continues.
>
> cheers
>
> Tim
>
> On 29/9/20 8:38 pm, Tim Tuck wrote:
> >
> > Hi all,
> >
> > I have a Z3805A that has failed. The internal power supply board is at
> > fault in that there is nothing on P3.
> >
> > I was wondering if anyone had schematic or more detail on it or ideas
> > about a common fault for the board.
> >
> >
>
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