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1. Topband: How Helically Wound Verticals Really Work (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Wed, 15 Jul 2009 21:46:18 -0700; The concept of the helically wound vertical (HWV) is appealing: no lossy loading coil, just a low loss wire. The "proof" of this is that you can run a kW and the antenna does not get hot. It is easy; /archives//html/Topband/2009-07/msg00058.html (11,271 bytes)
2. Re: Topband: How Helically Wound Verticals Really Work (score: 1): Author: Dan Zimmerman N3OX <n3ox@n3ox.net>; Date: Thu, 16 Jul 2009 12:37:21 -0400; 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; /archives//html/Topband/2009-07/msg00063.html (9,824 bytes)
3. Re: Topband: How Helically Wound Verticals Really Work (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Thu, 16 Jul 2009 16:14:21 -0700 (PDT); 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 tap; /archives//html/Topband/2009-07/msg00070.html (9,127 bytes)

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