[Boatanchors] RF in the shack

KA2PTE ka2pte at 3950.net
Wed Oct 26 12:40:42 EDT 2022


Recently got a "modern" Boat anchor SS linear
working again, only to have it fail due to what I think
was RF coupling to the 220v power line the amp was
running on with about a 600w cw carrier.

The wire length for the 220 is about 1/4 wave on 40m
where I was tuning up, so I think this was a factor in some
RF coupling to that wire which is run through a drop ceiling,
and is not shielded.

I plan on building a decoupling box in my spare time to have
an input that goes to the 220v outlet, perhaps a pi type filter
like I have seen in the tube linears from the old days.

Curious if anyone out there has built such an animal, or is there
something commercially you use?

I know hams that are into lots of power on 160m, often have problems
with RF in the house wiring, as the longer lengths are more resonant to that 
band.

--
Steve Hearns [ KA2PTE ]





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