Clint: Polyphaser's LNZ line of arrestors will pass DC. They're advertised as intended for use with GPS systems that require DC for outdoor electronics. You can read about them at http://www.polyphas
Frank et al: The feedpoint arrangement reminds me of my crossed-dipole turnstile array I used for a bit during the 80's to listen to OSCARs on 2M. The two dipoles were fed from a common coax and conn
TT: Along these same lines is <200 Meters & Down> by Clinton B. DeSoto of ARRL. Written in the early 30s, I believe (can't find my copy in the shack), this is an account of the early days of wireless
<snip> Cheers, Steve K7LXC co-author of the aforementioned reports available at _www.championradio.com_ (http://www.championradio.com) And well worth it. Steve's report convinced I could buy the Benc
Kirk: Click on http://www.erico.com/products/E1145WB06.asp and scroll to the illustrations at the bottom. That should explain the differences to you. The prefixes identify Cadweld One-Shots for singl
Barry: Unless you measure excessive losses on each run (using your MFJ259, etc.) after you disconnect each antenna, I would keep the coax in place. It's only another coupla years until you relocate.
Art: Tell your wife it's not a good idea to allow galvanized steel of the tower to be buried below ground level - rust and falling over of the tower come to mind - if you were to sink your concrete b
Roger: How much space for this coax loop do you have between the bottom of the boom-to-mast plate and the top bearing plate on the tower? 73 de Gene Smar AD3F As far back as I can remember (IIRC) I'v
TT: You can also find such ground bars at Harger: http://www.harger.com/products/grdcmp/grdbac/BICSI-gbk/bicsiptgbk/bicsiptgbk.cfm . But I believe they now sell only through distributors and might no
The problem with some engineers is that they strive for 100% perfection and accept nothing else. Ive seen many of that type come and go over my almost 50 years in the RF industry. They never get a pr
TT: To drive my 12 ground rods for my tower I used a 4 inch long piece of 3/4 inch threaded water pipe (black iron.) I screwed an iron cap (available from the same sources) onto one end and slipped t
Barry: I've been using my shunt-fed 64-foot Trylon on 160M since 2002 and it works amazingly well for me. About 5-10 dB better on TX and RX than my previous inverted-L. I posted several times here on
Dana: For a small hole like that you probably can get away with poking at the concrete with a 2x4 piece of wood as it's being poured. The goal is to ensure there are no voids or air pockets in the co
Rod: You can try painting it with cold galvanizing spray, available from Home Despot or Loathes, etc. You might find this in with the paints or with the electrical supplies. 73 de Gene Smar AD3F Hi a
John: What some on TT have suggested is installing two angle irons from the mast out to and beyond the tower legs. Use a muffler clamp to hold each angle onto the mast and arrange them so each rests
Bill: I wound an air core balun for my tribander a few years back. Mine ended up as five inches ID with five turns of RG-213. http://lists.contesting.com/archives//html/Towertalk/2004-07/msg00435.htm
Paul: I used lengths of #14 insulated solid house wiring to secure the coax to my Trylon T-500-64. It is (or was) cheap enough and re-enterable if needed. Simply make one or two wraps around the cabl
TT: I meant to post this earlier. I always say/write: On towers there is no such thing as an accident. Caveat Amateur. 73 de Gene Smar AD3F -- Original Message -- From: "Bill Turner" <dezrat@copper.n
Dennis et al: Here is a close-up photo of the Bencher Skyhawk's torque compensator http://www.vinecom.co.uk/skyhawk.html . The empty element clamps are for the foreward-most 10M and 20 M directors (r