[Antennas] RFI and GFI

2003年2月08日 16:21:53 -0500

50 years in HR and I think I've stumbled onto a new one!!
New QTH. Just got my AL-80B running. Antenna, Hustler 4BTV for now
approximately 10 feet above ground. [Log Periodic in spring after ground
thaw]. VSWR <1.7 to 1. Resonance at 7005.0 kHz [just where I want it].
Antenna approximately 50 feet from service box. Three sets of radials at
120 degrees. COAX Chokes at 1/4 wavelength from antenna. Ferrites at
entry to the shack.
Electrical Service: 100 ampere, GE 125 ampere service box, GE GFI 15
ampere breaker. #4 wire to 8 foot service ground rod.
At or above 500 watts on 40 CW the main bathroom GFI trips! [on dashes
not dots ...!!]. Obviously, RF on the ground [neutral] wire. The
individual GFIs in the 2nd bathroom and outdoor shed do not trip.
Question[s]: Should I add clamp on ferrites to neutral at the service
box? Is it NEC legal in USA/NH? Is there another fix for the next four
months [don't say run <500 watts <grin>].
Suggestions?
Deacon Dave, W1MCE
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