Topband: How Helically Wound Verticals Really Work

[Rick Karlquist]

Dan Zimmerman N3OX wrote:
> Even faster is a motor driven tap switch.  Of course, relays can be used
> but
> with a motor driven rotary switch you can easily have 8 different 160m
> taps,
> 3 80m/75m taps, and a 40m tap to handle your narrow bandwidths on the
> lower
> bands.

Yes of course.  About 30 years ago, I had a big rotary wafer
switch driven by a rotary solenoid.  Each pulse of the rotary
solenoid turned the shaft 30 degrees.  It had 12 positions,
which allowed 6 taps for 80/75 meters, and some other ones for
40 and 160.  It worked perfectly.

Rick N6RK