As others have noted, EVERY conductor is an antenna, and most computers
and rigs are built with manufacturing/design defects that couple RF from
attached cables inside the the box to cause problems.
Here is a tutorial on the topic, and an applications note for finding
and killing RF noise. The same ferrite techniques for killing noise
apply to killing RFI on cables in our stations.
k9yc.com/RFI-Ham.pdf
http://k9yc.com/KillingReceiveNoise.pdf
And proper station bonding reduces RFI and solves other problems.
http://k9yc.com/GroundingAndAudio.pdf
73, Jim K9YC
On 3/15/2019 5:25 AM, Lester Sousley wrote:
I suspected RFI, but was confused as to why only on 30 meters. I do use
chokes, but only on those cables connecting to antennas. Thanks for the
reply.
_______________________________________________
wsjt-devel mailing list
wsjt-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wsjt-devel
