Re: Litz wire for AM ferrite Rod Antenna?

On Sun, 25 Mar 2007 22:27:06 -0400, John Popelish <jpopelish@xxxxxxxx>
wrote:

John Larkin wrote:

In a superhet, high Q will make it that much harder to track the LO,
so you may well lose signal with a q=1000 rod. Why do you want a high
antenna Q? In the AM band, gain is cheap and s/n is dominated by
ambient noise, so it won't matter much.

I think the main point to keep in mind is that it is easy to
throw Q away, but hard to make it if the L and C don't have
it, to start with. You might want to calculate the ideal Q,
and then use an antenna coil construction technique that is
pretty sure to exceed that requirement.

At 800 KHz, q=1000, the resulting audio bandwidth will be 400 Hz!

John

.

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