Great but of "recycling" Bob :-))
Alan
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Wednesday, July 15, 2009 10:28 PM
Subject: Re: Re: LF: Microwave oven transformers
>
> On Wed, 15 Jul 2009 21:59:44 +0100 "Alan Melia"
> <[email protected]> writes:
> > Hi Ken yes I appreciate the usage. I was a little concerned that if
> > the
> > transformer was not designed for that kind of use it might not
> > necessarily
> > have sufficent insulation from that end of the winding to ground to
> > survive
> > the different stresses of of bridge rectifier. However Bob says he
> > has been
> > using one like that for years so I guess they must have been
> > conservatively
> > designed. I have had problems with transformers parallel primaries
> > and
> > series secondaries ( a common way of getting high voltages for
> > valves ....in
> > my youth :-)) ) breaking down under the voltage stress. I have
> > several
> > transformers I salvaged from MOs and I now feel a lot happier about
> > their
>
> I was able to mount a porcelain stand off at the same hole the ground lug
> was mounted to ,, I think I then added a gob of clear silicon from the
> local
> hardware store,,, was surprised that it held up,, but it did
>
> Bob K3DJC
>
>
> > use in HV PSUs. In the 50s.60s I was brought up with thick
> > insulation and
> > porcelain standoffs :-))
> >
> > An interesting thread.
> > Best Wishes
> > Alan G3NYK
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