On 20 Dec 2004 12:22:28 -0800, "Zack" wrote:

For instance, how do
you explain that a 40M bugcatcher won't exhibit a 15m resonance?

Hi Zack,

If so, it merely offers that across frequency, the same Parts do not
add to the same Whole.

73's
Richard Clark, KB7QHC

Zack wrote:
For instance, how do
you explain that a 40M bugcatcher won't exhibit a 15m resonance?

Because one runs into self-resonance long before 3x the frequency?
--
73, Cecil http://www.qsl.net/w5dxp


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An antenna or transmission line has resonances at (or near) odd
harmonics. But a lumped LC circuit doesn't. A bugcatcher is a
combination of the two. I'd think it likely that it has multiple
resonances, but not at harmonically related frequencies.

If you want a rule of thumb, don't look for harmonically related
resonances in any antenna containing a significant amount of lumped L or
C, or L and C distributed over a relatively small distance.

Roy Lewallen, W7EL

Zack wrote:

"It" refers to the balun, not the antenna. The balun works on odd, but
not even harmonics. Anyone have a simple explanation for explaining
whether something will work on harmonics or not? For instance, how do
you explain that a 40M bugcatcher won't exhibit a 15m resonance?

Zack Lau W1VT