This is not usual at all, due to resonances in the power
wires. It is surprising how sharp they are.
Rick N6RK
Pete Smith wrote:
> Today, listening on 10m, I noticed that whenever I tuned into the 28400-475
> range, there would be a marked increase in what sounded very much like
> ordinary powerline noise. Trouble is, I'm not aware of any mechanism that
> could account for this "peaking" in a certain frequency range. I have
> checked the rx, and it has the same apparent sensitivity in that range as
> elsewhere in 10m.
>
> 73, Pete N4ZR
> The World HF Contest Station Database
> Full details on 3435 contest stations - hundreds of new and updated listings
> Just updated 11/27/07 http://www.pvrc.org/WCSD/WCSDsearch.htm
>
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