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21. [Towertalk] SteppIR yagis? (score: 1): Author: jljarvis@abs.adelphia.net (jljarvis); Date: Tue, 19 Mar 2002 18:06:42 -0500; Any owners of a 3 el SteppIR yagi here? Anyone seriously looked at this stepper motor driven approach? Appreciate feedback if so. Jim N2EA; /archives//html/Towertalk/2002-03/msg00459.html (7,132 bytes)
22. [Towertalk] Thanks for the input (score: 1): Author: jljarvis@abs.adelphia.net (jljarvis); Date: Wed, 20 Mar 2002 08:40:27 -0500; Been a lot of help, both on and off reflector, dealing with LPDA's, 40m 4SQ, SteppIR Yagi's, and AB621 tower. Modelling antennas and designing tower rotation are the next challenges. Appreciate the f; /archives//html/Towertalk/2002-03/msg00486.html (6,457 bytes)
23. [Towertalk] Mast-Boom failure (score: 1): Author: jljarvis@abs.adelphia.net (jljarvis); Date: Wed, 20 Mar 2002 12:22:27 -0500; I've had THREE kt34's. Two XA's, one A. ALL THREE exhibited cracks in the mast to boom plate, and were replaced upon discovery in routine maintenance inspection. All were bought used. Two plates had; /archives//html/Towertalk/2002-03/msg00489.html (6,574 bytes)
24. [Towertalk] stacked LPDA's (score: 1): Author: jljarvis@abs.adelphia.net (jljarvis); Date: Wed, 20 Mar 2002 23:28:03 -0500; Tennadyne has modelled stacked lpda's, and offered a few words of wisdom today. 1) you can expect 2.2dB from stacking any pair of antennas. if you're not careful about matching the common point imped; /archives//html/Towertalk/2002-03/msg00509.html (7,379 bytes)
25. [Towertalk] NEC 4 Windows...training wheels (score: 1): Author: jljarvis@abs.adelphia.net (jljarvis); Date: Sat, 23 Mar 2002 15:35:28 -0500; Anybody working with NEC4WIN ever modelled an LPDA? How do I deal with the source phasing? How about stacks? Hints appreciated. N2EA; /archives//html/Towertalk/2002-03/msg00580.html (6,521 bytes)
26. [Towertalk] NEC 4 Windows limitations? (score: 1): Author: jljarvis@abs.adelphia.net (jljarvis); Date: Mon, 25 Mar 2002 13:33:35 -0500; Folks, I'm attempting to model stacked Log Periodics, and have run into what looks like a limitation in NEC 4 Windows. Each LPDA has 8 elements. Each element has a source, with the phase reversing by; /archives//html/Towertalk/2002-03/msg00629.html (7,010 bytes)
27. [Towertalk] mast material (score: 1): Author: jljarvis@abs.adelphia.net (jljarvis); Date: Sun, 31 Mar 2002 16:20:23 -0500; WY0V: The tubular material you purchased, marked sch40, is schedule 40 PIPE. You can get information on it in engineering handbooks. It's not overly strong, although it's plenty heavy. I have a 21' p; /archives//html/Towertalk/2002-03/msg00810.html (6,445 bytes)

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