[KLQRP] NVIS Revisited

[Bob Kellogg]

Guys,

I've had a lot to say about the simple NVIS antenna that we used on 
field day.  I built my version, modeled it with EZNEC, rebuilt it, 
checked it with an antenna analyzer and tried it on the air.  It works 
very nicely.

Having said that, here are some caveats:

First, all antenna design is a series of compromises, and one serious 
one is that the antenna needed to be simple to set up so it could be 
field friendly.   So, it's designed with a single mast, and the 
radiating wires double as guys for the mast.  This limits the design to 
the inverted Vee.  Other designs, such as a loop would  have greater 
gain, but would be much more unwieldy in the field.

Second, the EZNEC modeling program loses some of it's accuracy as the 
radiator nears ground level

-- 
Best Wishes,

Bob Kellogg, AE4IC
Greensboro, NC
Prolably, not nececelery - Benny Hill