Hi Mike et al - it turned out to be not one of the usual USB power-down
things (mine have been off for years), but an Advanced setting on the CW
COM port used by Winkey - I think the culprit was "Enable Selective
Suspend." Since I turned that off I have not had a single additional
problem with N1MM crashing. My station is pretty compliant with K9YC's
suggestions, but I still see occasional RFI symptoms - just nothing
critical.
73, Pete N4ZR
On 3/1/2024 6:52 PM, Mike Fatchett W0MU wrote:
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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