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dave · September 4th 10, 03:04 PM posted to rec.radio.shortwave

dave wrote:
wrote:

- Show quoted text -

My own cell-phone generates more noise than some of the cold war era
jammers,sometimes! That is another reason for using coax. And
grounding may bring more problems,sometimes it is better not to
ground. Static usually is not a major issue over here at my lattitude
(40* N).

GMS phones seem to get into everything. I'd look for an audio path, not
via HF radio circuitry.

Snow blowing across a wire antenna generates static electricity.
Grounding the transmission line where it enters a structure is
consistent with good operating practice. My radio floats on a 13 VDC
switch mode power supply. The only ground is the coaxial cable from the
feedthru.

GSM?

Brian Gregory [UK] · September 4th 10, 05:14 PM posted to rec.radio.shortwave

"dave" wrote in message
. ..
wrote:

- Show quoted text -

My own cell-phone generates more noise than some of the cold war era
jammers,sometimes! That is another reason for using coax. And
grounding may bring more problems,sometimes it is better not to
ground. Static usually is not a major issue over here at my lattitude
(40* N).

GMS phones seem to get into everything. I'd look for an audio path, not
via HF radio circuitry.

Snow blowing across a wire antenna generates static electricity. Grounding
the transmission line where it enters a structure is consistent with good
operating practice. My radio floats on a 13 VDC switch mode power supply.
The only ground is the coaxial cable from the feedthru.

Have you tried using batteries, or even a linear power supply.
You may be amazed how much noise on the lower bands just vanishes when you
do.

--

Brian Gregory. (In the UK)

To email me remove the letter vee.

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