[Antennas] zl special

[Peter Voelpel]

Alan Hughes wrote:
> I have been able to borrow an MFJ259 HF/VHF SWR Analyzer
> and was hoping to check the resonant frequency of a 17 meter
> zl special I have put up. With the two folded dipoles set at
> approx .5WL and .46WL I would have thought that I may see
> two resonances roughly about 18.1Mhz and about 19.6Mhz, however
> I do not see that at all. Can anyone suggest the best method of
> verifying the resonant frequencies of the two dipoles??
> I am guessing at the moment it could mean attaching  the coax
> to each individual dipole one at a time, but hoping there is an
> easier way of doing it.

Alan,

for my knowledge the zl special is made of folded dipoles.
So the feedpoint might me higher in impedance then the MFJ259
can measure, perhaps it will help if you put a 1:4 balun behind the MFJ.
You should be able to check the resonance with a dipmeter anyway

73
Peter, DF3KV