[amsat-bb] Re: DFing Terrestrial QRM
bruninga at usna.edu
Fri Sep 21 15:10:05 PDT 2007
>>... Now it is time to get out of the car and walk.
>> Holding HT on your chest. You have a NULL out
>> your back. Use it to get walking directions and
>> by now you are within yards of the source.
> ... this has never really worked for me, much to my
> surprise. Dunno why.
It is subtle. In fact, a lot of this signal strength tracking
is really by ear. Just listening to aggregate of the degree of
quieting and the rise and fall of the background FM noise. The
S meter just gives a benchmark now and then.
When walking with the HT, I periodically stop and with the HT
held tightly to chest, do a perroiette (I have no clue how to
spell a french dancing maneuver)... Lets call it a spin in
place. My ear hears the subtle peaks in the back ground noise.
The direction of my back on those subtle and narrow noise level
peaks is generally the direction to go next.
Or something like that. Doing this in a field of 8 foot tall
corn with razor sharp leaves and a sunburn tends to make one not
want to go in the wrong direction for too long. (Finding a
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