[Elecraft] Force 12 Sigma Verticals

[Stuart Rohre]

Those are really good verticals and are center fed, which makes them a 
loaded vertical dipole.  Certainly more efficient than the quarter wave 
simulated verticals without full size radials, or with out anything but your 
own radial hook up.

We have used them on science projects with outstanding ground wave coverage 
of 100 miles while at sea.

Stuart
K5KVH