[TenTec] OT: Question to the group -tuner and dipoles

[Paul Christensen]

> My particular interest right now is a good antenna for the new 475 khz 
> band that is coming.  I have a 1000 foot dipole at 50 feet and it 
> shows an excellent load at 475 khz.  My belief is this antenna will be 
> more efficient even at a 20 degree takeoff angle than a 50 foot 
> vertical that has a very large and inefficient loading coil and 
> radials.

It may model that way but at 475 kHz, surface wave propagation will likely
dominate and the vertical may be the better performer, especially  with a
large top hat.  IOW, feed that 1000 ft, 50 ft high horizontal wire at the
center (500 ft. per side) and make it into a Marconi "T" over a radial
field. 

Paul, W9AC