Check with your local electric utility -- a carrier-current control and
monitoring system is a possibility, especially since it's outside the ham bands
(they are supposed to avoid us and other known users). Do any UK Topbanders
have experience with these systems? ...they have been gotten some attention in
the RadCom EMC column.
Lots of gadgets use unusual frequencies for remote control and communications
using house wiring, phone wiring, or near-field (induction field) -- so don't
rule out an electronic appliance in your house or nearest neighbors.
73, Gary
K9AY
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