[Elecraft] Antenna Question

[Ron D' Eau Claire]

Chas, W1CG
> An end fed 1/2 Zepp antenna on 40 will be full wave end fed
> antenna on 20,
> a 3/2 end fed antenna on 15 and a 2 wave length end fed antenna
> on 10. All
> can be fed in a similar manner.

Right, Charles!

Critics will point out that the feeder imbalance well be progressively worse
on the higher harmonics because the maximum impedance of a "long wire" is
lower as the harmonic is increased and a wire with insulators at the end
does not resonate at exact multiples of the fundamental frequency.

Both of these effects are probably not significant to most hams, but it's
good to realize that a "Zepp", unlike a center fed balanced antenna, will
tend to show greater feeder radiation quickly as compromises are made in the
dimensions.

My experience with baluns feeding an open wire line when it presents a high
impedance at the ATU fit with yours. I "smoked" my large balun and an
insulator in the ATU running low power by trying to use a 40 meter Zepp on
20 where the feeder was 1/2 wavelength long.

Ron AC7AC
K2 #1289