[Antennas] extended zepp

[Danny Richardson]

At 02:36 PM 1/12/2006,Robert Lay wrote:
>just wish the poster would be more specific about exactly what aspect of 
>it he is concerned with. Apparently, he wants it to present a more 
>tractable impedance to his tuner, but we have very little to go on.


You're right Robert. With a little more information the antenna can be 
modeled in NEC to determine the feed point impedance and using several of 
the transmission line programs out there a good estimation of the impedance 
presented to the tuned can be found.

I use a Matchbox most for my tuned fed antennas. I've found that the 
Matchbox likes impedances in the range of 400-800 ohms - although, on some 
bands, it can be pushed a little bit. On those occasions when the Matchbox 
will not bring the SWR down to a value that my rig likes I just switch a 
T-type tuner in series and tweak things up a bit. Some feel that is too 
much work, but I subscribe to the belief that real hams twist knobs. :-)

73,
Danny, K6MHE

http://k6mhe.com





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