[Elecraft] easy simple portable antennas?

[Vic Rosenthal]

Trevor Day wrote:
> 
> Funnily enough, I have just been playing with a pole antenna (courtesy
> W0KPH web site) just to prove to myself that its surely not possible to
> radiate a decent signal on 20m using an antenna that is:
> 
> contained within a tube of 2 inches diameter by 14 inches long,
> fed with 4 feet of coax,
> and leaning against the inside of my shack window!!!

The link is http://www.qsl.net/w0kph/ if anyone's interested.  What he's done,
it seems to me, is make a dipole with a large amount of capacity between the
(small) halves and resonate it with a coil.  This dipole would be expected to
have a very low radiation resistance, which he matches via a link.  Probably the
circulating current in the coil is quite high, which means that for reasonable
efficiency it should be made of copper strap or tubing.

I think I'll try it -- I'll use tubing for the coil and put a capacitor in
series with the link to simplify tubing.  If it works at all, its small size
makes it interesting!

73,
Vic, K2VCO
Fresno CA