TT: Smaller guying radii in Europe possibly because of the price/scarcity of open land for such purposes? 73 de Gene Smar AD3F _______________________________________________ See: http://www.mscomput
TT: FWIW - Here's a possible source for the eighteen-inch-above-ground NVIS antenna fables: http://www.tactical-link.com/field_deployed_nvis.htm . 73 de Gene Smar AD3F _______________________________
Merlin-7 (?): Forget the balum - just get on the air and enjoy. 73 de Gene Smar AD3F _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wire
TT: The distortion that is mentioned below and in (the poorly edited) QST article is actually alleged multi-path interference. The explanation I've read in a couple of sources is thus: When an NVIS a
... in the Philly FCC office in the 1960's it was Joe Welsh, horn-rimmed glasses, white short-sleeved shirt, pocket protector and all. NO ONE was allowed to speak or even get up to hand in his test r
Alan: That positioning chain assembly is too restrictive for use on a tower of any kind, IMHO. You have limited ability to move around the tower members while you are connected to the tower via this
TT: While respecting Alan NV8A's decisions regarding his own safety on his tower, I agree with Pat AA6EG, below, that the Buckingham safety belt is very ruggedly built and a standard item of safety e
Mark: You're assuming that the underlying rope wil NEVER get cut. Covering up a rope lanyard, so that any abrasions or cuts are shielded from view, would give me the heebie-jeebies (forgive me - I'm
TT: Good solution, but guying may be needed depending on antenna load (2M Yagi vs HF dipole wires vs UHF vertical.) Concrete blocks could be used as anchors at guy points in parking lots. Be sure you
Gary et al: An opportune time to remind all about Mark N1LO's great tome on antenna and tower references: http://www.qsl.net/n1lo/towers.txt . Probably as close to anything as you'll come to a real t
Steve: Polyphaser's The Grounds for Lightning and EMP Protection, Second Edition, has this to say about radial grounds on rocky soil (p.22): In this situation [rocky soil], numerous slightly shorter
Doug: Your decision to supply the entire complex from TWO separate MG (motor/generator) sets just escalated your design an order of magnitude. You'll have to include a paralleling system of some kind
Jamie: A couple of ideas: 1. Can the inner pole section slip out of the next-heavier ones? If so, might you be able to remove the 3/4 inch and 1-1/4 inch sections and install guys rings BEFORE you re
Pete: I used 1000 uH chokes in the DC-over-coax feed system for my EWE relay boxes on 160M. The value was cited in several feed designs I researched at that time. I bought conformal coated chokes fro
All: Me, too. (Wire hangers bent like staples.) 73 de Gene Smar AD3F _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Sta
Barrie: That gauge wire is a waste for shunt-feeding. If flexible is what you want, you can use #14 insulated stranded wire from Home Despot. Probably around $20 for a 500 foot spool by now, but plen
TT: This evening my front doorbell rang and a neighbor lad and his mom asked to speak with me about the structure in my back yard. My wife told me a couple of days ago these folks had dropped by, ask
Jim: I use marine grease to lube my bearing at the top of my tower. I bought a kit of three tubes of the reddish-colored stuff at a boat/marine store when I put up my tower in 2001 and still have two
Doc et al: My comments embedded below. 73 de Gene Smar AD3F I decided to use the larger ones (30+ amps) without exception at my station. Eliminates the more delicate contacts of the smaller connector
Barrie: Check out http://www.harger.com/productinformation.htm , Section 2.6.1, Bonding Lugs and see if the Harger model 222T lugs would work for you. They are tinned bronze connectors like the ones