long wire AM antenna
blitz wrote:
If you can't get Chicago at night on the GE SR, it's going to be a
challenge on any radio.
I think TJ is right- if you're going to bother with a long wire, it
needs to be about 150' to get resonant (as in, tune the frequencies
you want) down to 670 AM. My antenna, like yours (wire, then coax into
the house) at 150', overloads most radios. So it needs some
throttling. Otherwise, it's a monster for signals.
Making the antenna resonant won't help your signal/noise ratio at all.
And it makes no sense to make the antenna larger to increase the signal
(and noise), then adding an attenuator to decrease it so it doesn't
overload your receiver.
OTOH, a loop might really help you sort out the competing signal.
. . .
Yep.
A lot of amateurs get confused about the requirements for sending a
strong signal and those for receiving signals clearly. At HF, they're
quite different. And a lot of amateurs have the mistaken idea that
there's something magic about an antenna being resonant. That confusion
is why you keep getting advice to make your antenna longer, higher, and
resonant, while those aren't the solution to your problem at all, and in
fact are likely to create additional problems due to receiver overload.
Roy Lewallen, W7EL
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