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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 |
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