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1. [Towertalk] ping-pong stacks (score: 1): Author: jljarvis@adelphia.net (jljarvis); Date: Wed, 29 May 2002 16:44:22 -0400; Folks, Anybody got any feedback they'd care to offer on the topic of feeding a 2 yagi stack OUT of phase? Anybody experimented or modelled with less than 180 degree phase reversals? i.e. 90, 60, 30..; /archives//html/Towertalk/2002-05/msg00780.html (6,923 bytes)
2. [Towertalk] ping-pong stacks (score: 1): Author: jimlux@earthlink.net (Jim Lux); Date: Wed, 29 May 2002 16:03:58 -0700; As a first order approach... use the phased array concept of pattern multiplication ... Figure the pattern for two isotropic antennas fed in the way you want, then multiply that pattern by the patter; /archives//html/Towertalk/2002-05/msg00786.html (9,467 bytes)
3. [Towertalk] ping-pong stacks (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 29 May 2002 21:02:21 -0400; I'm wondering whether this really works, for stacks at HF, where the ground is a small number of wavelengths away? It seems to me that identical antennas are far from it in that environment. In any c; /archives//html/Towertalk/2002-05/msg00790.html (7,674 bytes)
4. [Towertalk] ping-pong stacks (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Thu, 30 May 2002 03:05:17 +0100; phase reversals? i.e. 90, 60, 30...and what happens with vertical angle lobe steering? Here are two KLM 610's at 1 and 2 wavelengths. These are are old EZNEC models which are not as accurate as what; /archives//html/Towertalk/2002-05/msg00795.html (7,896 bytes)

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