Thanks for the reply. The problem was solved when I

1) Ran #12 wire through the 2nd-story window sill and down to a 10 feet long
copper clad ground rod. The length of the wire run is about 15 feet. While
this may seem to be an obvious step, at my previous QTH the use of an earth
ground made RF feedback problems worse on some bands.

2) Installed an Amidon FT-240-77 ferrite toroid as a common-mode choke (11
turns) in the Orion's DC power supply cable and located about 18" from the
Orion. I am using an Astron RS-35A linear power supply (the fan on the
Ten-Tec switching PS was too noisy). The cable run between the power supply
and the Orion is somewhat lengthy because the Orion is connected to an
MFJ-1129 multi-outlet strip.


"Charlie" wrote in message
...
I had similar issues with USB disconnects etc while operating HF QRO. I
then added a ground wire from the case of the PC to my station ground and
that resolved it for me...

--

73,Charlie-AD5TH
www.ad5th.com


"RadioGuy" wrote in message
...
In article .net,
says...
"John, N9JG" wrote in
t:

When I operate on 75 meter SSB with my transceiver, my computer beeps
and disconnects/reconnects my USB connected keyboard. Note that I do
not
have this problem on 40 meter SSB. My computer is located on the
second
floor of a brick house, and one end of my dipole is about 15 feet from
my shack.

From comments made by others, I may have to put RF filters on the
cables
and wires connected to my computer. I am contemplating the use of
Amidon FT-240-77 ferrite toroids, which have an I.D. of 1.4 inches and
cost $9 each. If I buy in quantities of 10, is there a cheaper source
for this toroid?

Any comments or suggestions on this problem would be appreciated.



Do CW, you won't know if it's your computer or radio beeping. Problem
solved.


SC

You know nothing. You have the lowest brain capacity of any living
human in the world!!