Mike.

I just checked my Astron RS35 supply, and there is no grounding bolt as you 
suggest.  On the very left-hand back portion of the supply, there are the DC 
power connections at the top, followed by a fuse, and finally, there's the 
AC power cord connection.

When things shut down as I key up, it still sounds to me like the power 
supply is on--in other words, the hum doesn't go away, as I think it would, 
if it had shut down completely.  This is why I'm thinking the floating 
ground might have something to do with the rig runner.

But again, I can't be sure.

So, keep on speculating, and before too long, I'll have dozens of things to 
try.

73 from Tom Behler:  KB8TYJ


----- Original Message ----- 
From: "Mike Duke, K5XU" <[log in to unmask]>
Tco: "Tom Behler" <[log in to unmask]>
Sent: Tuesday, February 08, 2011 8:56 PM
Subject: Gary's Post Made Me Think Again


Some, but not all, of the PS35 Power supplies, have a grounding bolt
on the back panel near where the AC line cord comes out of the
cabinet.

If yours has that grounding bolt, run a wire from it over to your
station ground, or attach a counterpoise to it.

One more thing about a counterpoise, especially one which is indoors.

You don't have to use copper strap or brade for the counterpoise
wires.

Zip cord type speaker wire from Wall-Mart will work just fine in that
application. You can use both conductors, or just one, or even pull it
apart and have two completely separate counterpoises.

It's that mad scientist thing again.





Mike Duke, K5XU
American Council of Blind Radio Amateurs