It does not take a lot of RF if conditions are right. A few years ago
I received a little 40 meters QRP transceiver for Christmas. Did not
have a 40 meter antenna at the time.
listened on my Beverage antenna, and everything was working OK. just
for the heck of it, called a European and he came right back 559.
I told him I was working QRP , the next transmission told him I was
using a Beverage antenna and he signed off rapidly. 'Difficult to
believe'
Loss is I squared R. as the current is lowered then loss drops rapidly.
73
Bruce-k1fz
www.qsl.net/k1fz/bogantennanotes.html
On Mon, 16 Nov 2015 08:27:17 -0500, Tim Shoppa wrote:
I have examined the RFI situation at some local apartment-bound
ops on 40M
and I swear when they work into their loop that it is their apartment
wiring that is radiating, and not the loop antenna. It's gotta be worse on
160M.
A guest op at a local contest superstation reported how hard it was to work
DX the first morning on the high bands, then went to check out the antenna
switching after a local with just a wire (aka me) was working the DX before
him. He found out that all the QSO's he had that morning up to that point
had been worked with a Heathkit Cantenna dummy load :-). Yes, it is very
possible to work stations just using a Cantenna! (Possibly circa 30-40 dB
down leaking into the beam, but I'm guessing feedline radiation can be
similar too.)
Tim N3QE
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