RadioBanter - View Single Post

September 14th 03, 07:26 PM

On 14 Sep 2003 09:38:09 -0700, (Tim Shoppa)
wrote:

I've got a few PC's in nice metal cases. I can actually run most of my
receivers near the PC without too much problem, as long as the receiver is
powered by batteries. But the instant I hook my sound card to the receiver,
or I run the receiver off of AC power, all the SW bands are filled with
S9 hash generated by the computer and network equipment.

What's the most economical and reasonable way to deal with this? Will
RFC's on the power, ground, and sound lines be good enough? Those snap-
together ferrite cores from Radio Shack help a little, but not
nearly enough. In a few weeks my computer-controlled TenTec
RX-320D arrives and I want everything to be in ship-shape by then.

I have a long 1/8" M-F extension cord from my line-in on my computer
to my radios... had the same problem. Cutting the female connector
off the end of the extension cord and soldering another one on but
leaving the shield off solved most of the problem. This broke the
ground loop.

If that does not work, and since Radio Shack stuff is normally
readilly available, they sell a Ground LP Isolator (270-0054) that
should do the trick or you can roll your own using their isolation
transformer (273-1374) which is $4.

73's and Cheers,
H Johnson

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H Johnson
KG4WOU
Member of the Madison County ARES,
Huntsville-Madison County EMA RACES,
and SKYWARN/NALWARN
Kenwood TM-733A, FT-50R
Sangean ATS909 w/wires
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