Michael:

I'm going to test the switcher for RFI later today, if I get the chance, so 
stand by for updates.

Tom Behler:  KB8TYJ

----- Original Message ----- 
From: "Michael Thurman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 09, 2011 9:25 AM
Subject: Re: Astron RS35 Power Supply Update


I'm curious if you still have the rfi issues with the switcher. it would =
be interesting. the astron supply actually has chassis ground ac ground =
and the negative terminal all common ground and I suspect the switcher =
might not. you could have a ground loop even without a ground connection =
on the astron.
73 kb7nla
On Mar 7, 2011, at 3:13 PM, tom behler wrote:

> Hi, folks.
>=20
> Well, I know everyone is waiting with bated breath and eager =
anticipation=20
> regarding the situation with my Astron RS35 power supply, and the need =
to=20
> re-establish the ground connection to the unit that was loosened  by =
me last=20
> week.
>=20
> First the good news:
>=20
> I opened up the supply, and survived an extensive and very interesting=20=

> exploration of the unit's inner components.  No shocks;  no tingles;  =
and no=20
> unpleasantries.
>=20
> Now, the not-so-good news:
>=20
> In trying to re-tighten the ground connection on the bottom left-hand =
part=20
> of the supply last week-end, I did manage to pop the wire out of the=20=

> terminal that is fastened onto the internal philips screw part of the =
ground=20
> lug.  The wire is just hanging there, waiting to be re-connected.
>=20
> I asked the XYL to do a visual inspection of the situation, and she=20
> indicated that, although the wire is black in color, it clearly looks =
like=20
> it should go right back on the empty ground lug terminal.  It is the =
only=20
> loose wire we see anywhere.
>=20
> I am a bit confused as to why a ground wire would be black in color, =
but=20
> that seems to be what the manufacturer decided to do.  I also still =
can't=20
> believe that the manufacturer made the ground connection the way they =
did.
>=20
> Does anyone have any suggestions as to how best to put the ground =
connection=20
> back together?  My current thinking is to have a sighted ham friend =
come=20
> over here and re-solder the connection for me.  It's quite hard to get =
to,=20
> since it is buried underneath a whole bunch of other wires and =
components,=20
> and I simply don't want to create more problems than I already have.
>=20
> In the meantime, I will still be able to remain on the air.  I have a =
Samlex=20
> switching supply that I use for HF work when camping in the RV during =
the=20
> summer time, and I have put it into service until the Astron repairs =
are=20
> made.
>=20
> Thanks again for everyone's patience through all of this, and for =
putting up=20
> with my inordinate amount of caution about sticking my hands in there =
to=20
> diagnose the problem.
>=20
> 73 from Tom Behler:  KB8TYJ