Are we certain that it is an rfi issue and not a power saving "feature"
of Windows?
W0MU
On 2/22/2024 12:23 AM, Jim Brown wrote:
On 2/21/2024 8:03 AM, Pete Smith N4ZR wrote:
I'm wondering if it could be helpful, from an RFI perspective, to put
another common mode choke on that cable where it enters my house.
Pete and I have corresponded about this directly, so this is for
others reading the mail.
My advice, in general, is that if everything is done right with
respect to grounding and bonding, is that chokes on feedlines at the
shack should not be needed. But I've received correspondence from hams
who do not have ADEQUATE chokes at the feedpoints, or that have not
done good grounding and bonding, that chokes on feedlines at the shack
help.
Interconnecting cables can pick up transmitted RF from our antennas,
coupling that RF into equipment by the Pin One Problems that are
present in virtually all consumer equipment -- computers, home
entertainment, etc. -- and nearly all ham gear. When visiting ham
conventions, I have yet to see a ham transceiver that didn't have Pin
One Problems. Chokes CAN be necessary on these cables to prevent the
kind of problems Pete is having.
73, Jim K9YC
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