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1. [TowerTalk] How to create discrete phase shift in stack? (score: 1): Author: "Bill VanAlstyne W5WVO" <w5wvo@cybermesa.net>; Date: Tue, 27 Dec 2005 13:53:44 -0700; I have a StackMatch II (to be used on the 6M band) that I've modified to add a BOP capability by switching in a 1/2-wavelength segment of coax in the lower antenna's feedline when in the BOP position; /archives//html/Towertalk/2005-12/msg00542.html (8,271 bytes)
2. Re: [TowerTalk] How to create discrete phase shift in stack? (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Tue, 27 Dec 2005 14:32:12 -0800; You can create a lumped element delay line consisting of a pi network with electrical phase shift of +X degrees if you use shunt capacitors having a reactance of Zo*Cotangent(X/2) and a series induc; /archives//html/Towertalk/2005-12/msg00547.html (8,747 bytes)
3. Re: [TowerTalk] How to create discrete phase shift in stack? (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 27 Dec 2005 16:13:18 -0800; A single DPDT relay does it nicely. But, as you noticed, you can't switch just one end. For a narrow band application, an LC network might work. You'd have to try some combinations on paper to see if; /archives//html/Towertalk/2005-12/msg00549.html (11,527 bytes)

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