[ICOM] Kinda ICOM Question!
Max Harelik
mharelik at comanchetx.com
Mon Aug 21 11:02:15 EDT 2006
"The antenna is mounted on a Hustler Mag Mount on top of the roof away
from all obstructions." <snip>
Are you using the standard 54" Hustler mast (#MO-1, -2, or -3) or the
short 22" mast (MO-4) between the resonator and the mag mount? The
choice will impact how much of your transmitter power is actually
radiated as RF and how much is dissapated as heat. From your
description, much of your signal is winding up as heat in the coil. When
you adjust for minimum SWR, make sure that your impedance is as close to
the required 58 Ohms as possible for true resonance. Otherwise, you'll
have to deal with the mismatch between the antenna and your feedline coax.
I'm presuming that you're using the mag mount for stationary operation.
I can't imagine using it while moving. (Except perhaps one of the big
triples that various manufacturors have.) My full-size Hustler is
wind-resistant enough to lean back in the wind at road speed, and I
wound up having to clamp a piece of radiator hose over the base spring
to stiffen it up a bit. BTW, I've also used my Hustler bolted to the
package rack of my bicycle with my IC-703, dragging the wire
counterpoise behind it. Worked fine. GL
73,
Max, K5OVW
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