Hi, Ward and all; Imagine this on CW! 73 de WOØW Ward Silver wrote: Here's an even better idea for a low-profile antenna. Figure out how to drive the retractable tubing from the PTT line so th
Read Martin A. Uman's books Lightning, c 1969 and All About Lightning, c1986. Uman made a career of studying lightning and lightning protection. PolyPhaser's book and ICE's pamphlets are fairly sound
ICE sells a whole house surge protector for power, telephone and cable communication. I recommend that you seek information from each manufacturer before deciding. 73 de WOØW Eric Rosenberg wr
Hello to all; Be cautious about applying one manufacturer's recommendations to another manufacturer's tower in deciding on dimensions for the base of a self supporting tower. Total weight of base, to
I assisted the back hoe operator by digging the first 10" or so by hand, precisely to the dedired dimension or slightly under, in sod. The back hoe did not disturb that. The bottom wasn't perfect. I
Hi, David and all; 3-5 parallel copper wires spaced 2" or more is as good as copper strap. Compare the cost to decide. Greater separation and more wires will further reduce the inductance, which is w
As has been mentioned, the key to preventing condensation is to keep the equipment internal temperature slightly above the dew point. If you keep it above the ambient temperature, you know it is abov
Hi, Bob; I have the CL-33-M manual and will scan and send it later this evening. 73 de WOØW Bob T. wrote: I am in desperate need of a copy of a MOSLEY CL33 manual. I am in the process of refur
Hi, Dave Brian Beezley, K6STI, explains how to match the antenna in the article on page 33 of the September 95 QST (same as the issue from which you built W6KUT's version of Brian's creation). ______
Jerry Sevick, W2FMI, published several articles regarding short vertical antennas for 40, 80, and 160 meters in QST. Go to ARRL and search on his name or callsign. CQ Communications published a small
Several references, including the ARRL Antenna Handbooks, advise using more radials rather than longer radials, at least until reaching about 50 in number. 73 de WOØW Howard Klein wrote: I hav
Hi, Mark; If you deviate from the recommended installation specifications, especially if you with to make it less capable of supporting your tower, get a competent engineer to analyze it. If anyone m
Hi, Bill and TTs; EZNEC modeling indicates a very slight assymetry and reduction of gain resulting from omitting 90 degrees segment of the radials. Both figures are within the inaccuracies associated
Hi, Tod and TTers; Tod presents 'an elegant solution." Furthermore, by optimizing the length and diameter of the arm versus area of the vane, one can minimize the wind loading on the tower and mast.
Hello to John, Tod, and all TTs: I am very interested in obtaining copies of the articles mentioned by John and Tod. I hope I am not too old to learn from them and thus correct the errors of my think
Greetings, TTs; In my former life as an engineer, it was agreed that keeping water out of enclosures was difficult. When possible, we designed enclosures with drainage and ventilation (and screening
Hi, Gang; Any experience or advise on using a propane heated soldering tip for soldering the PL-259? I'm referring to the rather heavy tips, 1/4 or 3/8" diameter. They can be custom made for extra ma
Combining wood with metal will damp resonant responses and will reduce peak stresses. 73 de WO0W MIKE GREENWAY wrote: snip - I asked a structual engineer afterward about doing this and he said they s
Hi, Mike; Regarding using aluminum wire for radials: Aluminum is attacked by alkalinity in the soil, whereas, iron is protected somewhat by alkalinity. Some operators report fair service using steel
The 15th edition, ARRL Antenna Handbook, cites ranges for conductivity: Poor soil 1-5 milliseimens per meter Average soil and fresh water 10-15 milliseimens per meter Very good soil 100 milliseimens