A 33 foot vertical is not a particularly good choice of length for
use on multiple bands. End fed it will have a very high impedance on 20
meters.If you can make it longer it will be an easier match on 20 meters
for whatever tuner you use. I used to use a 40 foot vertical with a
Kenwood TS-50 and AT-50. It worked well for all bands 80 through 15
meters. I used 40 foot length because the MS-44 mast sections are five
feet long. Fourty Three feet might be a nicer length, since that is
5/8ths wavelength on 20 meters. I fed the vertical directly with coax,
and had the AT-50 on the operating table. A remote tuner at the feed
point would have been better. There is no particular reason to make the
antenna self resonant on any band, especially when you are using a
remote tuner at the feed point. The notion that resonant antennas
radiate better is a ham myth. You may be able to keep the SWR on the
feed line low on a band or two by picking a resonant length, which can
reduce losses in the transmission line. The losses should be pretty low
anyway, and if you are using a remote tuner at the feed point you can
forget about that. There is a good reason to to avoid making an end fed
antenna a multiple of 1/2 wavelength long on a band you would like your
tuner to be able to match it on.
What I said about resonance not being important does not apply to
parasitic elements in an array.
DE N6KB
David Humelsine wrote:
> I have decided to up grade my ham shack with a Jupiter. My present set up is
> an Argonaut V with a 33 foot vertical and 36 radials. I have a SGC 237 tuner
> at the base of the vertical for multi band use. If I order the Jupiter with
> the internal tuner and install a balen at the base of the antenna how well
> can I expect it to work. My personal feeling is an external tuner like the
> LDG 1000 pro would be better. Comments please off line from anyone using the
> Jupiter and 33 ft vertical antenna would be appreciated.
>
> David N5 WMQ
> n5wmqmail@comcast.net
> _______________________________________________
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> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
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