[Elecraft] Common Mode chokes to reduce noise

[Ed Cole]

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