The classical approach:
Look at the spectrum and notch or filter out what is not wanted.
The FS-700 does have a set of filters and a front panel LORAN output
(w/gain)
to monitor with a spectrum analyzer for filter settings.
I like the AUSTRON model 2048 LF Multifilter, just like a 1X4 RF
multicoupler
with a series of 8 notch filters for ~70 thru 130 KHz, with a peak
indicator and a spherics indicator light.
Notch filters can be switch selected on the front or some are on the
real panel.
For intermittent signals like noises, the peak indicator lamp gets my
attention.
Stan, W1LE
On 5/5/2012 7:23 AM, Poul-Henning Kamp wrote:
In message<E95F2CE5F1BA47B0A959AE061D4B9677@athlon>, "Ulrich Bangert" writes:
The effect stopped to appear from the very moment when the antenna was put
out of the house in a distance of abt 20 m. While the effect is still not
completely understood there are at least 2 possible reasons:
It is far more likely that you have a switch-mode power-supply in your
house which wanders over the 80-120 kHz frequency band in a very
noisy way.
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