[RFI] Computer (maybe just USB subsystem) shutting down

[Jim Brown]

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