In article ,
Jeff Liebermann wrote:

Fun, though... I've used mine on several occasions to locate
sources of QRM or jamming.

Ummm.... How did you get it to produce a usable bearing if there were
two transmitters on the air at the same time? I can see if it you
waited until the jammer was the only carrier, but few jammers allow
that to happen. Mostly we use doppler for the traditional stuck
transmitter.

A lot of the jamming in question is jamming of repeaters, so you are
DF'ing on the repeater's input frequency.

If you have a rough idea where the jammer is operating, you can often
get a Doppler detector (e.g. on a car) into that area and get a decent
signal from it when he's jamming... but be far enough away from the
person being jammed that you don't hear any of his signal (although
the repeater does).

A Dopper rig on the roof of a car has a far smaller line-of-sight
radius than a repeater receiver mounted up on a high building or
hilltop.

--
Dave Platt AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
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