In a message dated 98-03-06 12:07:01 EST, brunet@us.ibm.com writes:
> Is it theoretically possible to have 10-40 + warc on one boom or one mast?
Sure - anything's possible. Is it practical and will it work - maybe.
ANY antenna design contains some compromises in gain, F/B, bandwidth,
SWR, etc. You put more bands together on the same boom and you start making
more compromises.
> Will the resonances of the various antennas cause too many problems? I
have
> heard a few bad storys about the Mosley Pro antennas but it appears that
> this
> may be due to a quality control problem in the manufacturing of the traps.
Piffle. There is a quality control problem in the DESIGN of the Mosley
PRO antennas.
> At
> this point I am more interested in what research has been done from a
> theoretical point of view, i.e. is it theoretically possible before I
> consider
> whether it is practically possible?
So buy yourself some antenna modeling software and some antenna books
and get to work.
>Beside single boom solutions, I am also
> interested in single mast combinations like a F12 C3 or F12 5BA or TH11
> coupled
> with a F12 EF240230 or a C3 plus 30m dipole coupled with one of the 3
> element
> 40m monobanders.
Is there a question in there? The Force 12 antennas have made some very
interesting innovations in antenna electrical and mechanical design. They work
too as does the TH11.
>Recently for a few years I operated a station with Telrex
> 20
> and 40 monobanders on the same mast and both seemed to be negatively
> effected
> by the other (vswr and patterns). They were about 10 feet apart.
>
With that kind of spacing, the interaction problems are pretty
negligible. Is there a question in there or what?
You've got lots of questions and it's never too late to start learning
some of the answers.
73 and GL, Steve K7LXC
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