[Elecraft] RFI With KPA500 Full Output on 40m

[Jim Sheldon]

For some reason, probably resonant length of coax or something, plus the 40 meter dipole runs directly over the house and parallel to the incoming power service, Every time I key a rig with more than about 50 watts, I trip every GFI outlet in the house.  I haven't found enough big snap-on ferrites to hit all the romex coming out of the panel, but when I do, I'll certainly put 'em on.  A really big one that would snap around the incoming line at the panel would be nice, but so far I haven't found a source of snap on's that I can afford.  Not sure either on what material would be best for that.

Jim - W0EB

>> When I crank my KPA500 up to full output on 40 meters, I get RFI
>> on my
>> home security system. Lights up all the remote panel lights and
>> beeps.
>> Luckily it does NOT set off the alarm. If I back off output to
>> 350 watts
>> or so, no RFI problem. Both ends of my RG-8 coax have ferrite
>> chokes. This