Fw: [Elecraft] Flagpole antenna

[Vic Rosenthal]

Kevin Cozens wrote:
> 
> >See also the all band "Sommer T-25/S Vertical Antenna" at
> >
> >http://www.sommerantennas.com/t25s.html
> 
> This looks similar to the Butternut HF-6VX antenna I have used for several
> years except it doesn't have any extra coils/capacitors on it. 

It's nothing at all like the butternut.  The Butternut uses traps and linear
decoupling to obtain resonance on the bands it covers.  The Sommer T25 is a
folded monopole with a remote loading resistor coupled to it through a special
transformer.  The principle is the same as the TFTD and other antennas that use
resistance to smooth out SWR variations with frequency.  B&W makes several
antennas like this.  At best, such antennas are a trade off of efficiency vs.
SWR.  This one is a very poor trade off except (perhaps) under optimum
conditions.  I don't recommend inefficient antennas for QRP use!

By the way, I also had a Butternut HF-6V and was quite happy with it.

Vic K2VCO