[Antennas] Need Ideas

[Ray Brown]

----- Original Message ----- 
From: "Ron Youvan" <ka4inm at tampabay.rr.com>

> Ken wrote:
>
>> I have a friend that is a voluntary emergency worker. He wants to have some way to extend the range of his HT while working in 
>> the back country/ mountains. The frequency is close to 2m, I will get that information when I start the calculations.
>
>> The antenna must fit in a back pack when not in use and not be the only thing in there.
>>   Something easy and quick to set up/through up and take down.
>
>> I would like to have a reliable home-brew for him.
>
>> YAGI?
>> Dipole?
>
>> Ideas ??
>
>   First, he needs an end fed 1/2 wl dipole, home or commercially built.
> (frequently a telescopic over-length ducky)
> Secondly he needs a mag mount 1/4 wl vertical.
> Thirdly something like a "J" pole or hangable vertical dipole.  Remember "J" poles can be made with
> twin lead and windowed line, in the open or within a section of PVC pipe.
> -- 
>    Ron KA4INM - I'm proud to be Chuck's pop!


  If he's going to be walking along, then this will end up looking like a military rig,
but you could get an army surplus metal tape antenna as the emitter, with the
mount on the top of the backpack, and a counterpoise drooping down from
the mount. The debate would be if a 1/4 wave or 1/2 wave would be most
effective. If you use a half-wave tape, and you accurately measure the
frequency, you could clip the end of the tape back on the rack, since it
should be a zero voltage point, half-wave and all that. Might be interesting
to experiment with, altho I don't backpack any more (not with the BSA
any longer, long story). But that way, you could set it for whichever mystery
frequency you want to. :-)


                Ray, KB0STN