[Elecraft] Vertical for 40 & 80 - follow-up

[Darwin, Keith]

Hey Elecrafters, Elecraftonites & Elecraftonians!
 
Several months ago I posted a question about using a Hustler 80 meter
resonator on the top of my simple stick vertical antenna to turn it into
a 2 band antenna.  I have this 1/4-wave-on-30-meters vert that I feed
with a tuner.  It is fine on 40, 30, 20 but is lousy on 80.
 
Anyway, I picked up a Hustler 80 meter resonator.  Hustler says it is
just a big coil, not a resonator.  Hmmm.
 
I mounted it to the top of my vertical and it works perfectly.  The
impedance of the vertical with and without the resonator on it is very
nearly the same (measures slightly taller with it on) except there is a
narrow dip in the SWR curve on 80 meters with the resonator in place.
 
So, my vertical continues to resonate on 30 meters but now also
resonates on 80.  The impedance on 40 & 20 is essentially unchanged so
my tuner settings very similar to what they were.
 
- Keith KD1E -
- K2 5411 -