[RFI] Please comment this picture

john at kk9a.com john at kk9a.com
Tue Jan 3 22:49:32 EST 2023


What is your feedline?

John KK9A

David Eckhardt W0LEV wrote:

Jim, I have measured (Icom 7300) reduction of nearly 11 dB of noise pickup
from local sources by installing a bifilar wound common mode choke in the
shack to transition from common mode from the transceivers/amps to
differential mode of my antenna feedline.  It is NOT a waste of energy,
time, and money (built and measured my own).

Dave - WØLEV



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