I primarily work eme so band noise is a prime enemy of weak signals.
I was reading the comments about combating mic noise and wondered if
adding some ferrite beads to my 6m coax at the shack would have any
effect on received broad-band noise. I definitely see the noise peak in
one direction of the antenna S5/S7 vs S2 at 180-degrees azimuth
rotation, and it also drops with about 13 degrees of antenna elevation.
My 6m LFA antenna use ferrite bead baluns. Transmission coax runs
40-foot vertical and 50-foot horizontal on the ground. Rx comes from a
remote preamp connected thru a TR relay with output thru LMR-240 coax to
the Rx antenna port of the K3.
73, Ed - KL7UW
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