> The 2 el Cushcraft does not have a resonance on 15m. This is probably
> due to the fact that it has loading coils. I have the 40-2cd just 6
> feet above a KT-34xa tribander.
That's correct!!!!
Once an antenna is loaded the first resonance above fundamental can be a
long way off from the third harmonic. It can even disappear.
The closer the system approaches a tuned circuit (by the addition of
loading), the less problematic odd harmonics are.
It would always be a good idea to check and be careful, because a loaded 40
meter antenna might hit some other band instead of 15 (like maybe 17M or ten
meters even).
73 Tom
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