[Elecraft] antennas

Kurt Pawlikowski kurtt at pinrod.com
Sat Dec 29 09:18:04 EST 2007


Shaun,

    It sounds like you're wiring the shielded twisted pair like an 
extension of the feed coax. Remember, anything that's shielded is 
designed to keep the signal traveling on it from radiating. But, I may 
be misunderstanding your description. While there are several antenna 
designs that use coax as a radiator (see: 
http://www.hamuniverse.com/bazooka.html), their "claim to fame" is broad 
band, low SWR, not size.

     There are many limited space antennas (see this Google search: 
http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=antenna+design+%22limited+space%22&btnG=Search), 
but YMMV (You Mileage May Vary). I stumbled across this "small" antenna 
that seems to have some good reviews: http://www.tak-tenna.com/ . At any 
rate, those should give you some ideas about antennas.

    Regards,

    kurtt

    Kurt Pawlikowski, AKA WB9FMC
    The Pinrod Corporation
    kurtt at pinrod.com
    (773) 284-9500
    http://pinrod.com

Shaun Oliver wrote:
> Hi all, I'm sorry to bring up this off topic subject, but I have a 
> question for those of you that like to cobel together your own antennas.
> I have here some wire htat has 2 center cores and an outer brade. this 
> in turn is covered by an outer foil and then insulated. what I'd like 
> to know, if I were to attach some coax to one end of this wire, center 
> core to center core and brade to brade, etc, would it be sufficent to 
> pass as a dipole or am I kidding myself? basically wwhat I'd like to 
> know is if it will work. I'm strapped for space here so intend on 
> aquiring some electrical piping and coiling the wire around it and 
> sealing it from wear and tear by the elements. if you could, please 
> kindly write me off list as I don't want to clutter the list up too 
> much with off topic posts. my apologies for this one as I wasn't sure 
> where elseI could take this one.
> thanks in advance.
> shaun
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