Your average run of the mill Tashjian tower, say the LM470, 70'tall, four sections. It's rated for 20 sqft wind load at the top of the tower, not at the end of the 5-10 foot underrated mast most hams
All Welding rebar is not for your average Ham Radio doofi. You need the right steel, the right sticks, the right wire/gas if MIG welding, the correct technique (the hard part). A welded connection wh
The Peet Bros. 2100 is continuous. On 6/15/2017 1:10 PM, Chris wrote: When considering WX stations, some of you guys may find this irritating like I did... but be aware that some WX stations only rep
Leave the galvination in place. I don't think you have to mess with paste or paint of any sort. I would protect the connection from weather. Do not remove the galvanization. Just put some layer of Va
Cubex Quads recommends 1/4 wavelength 75 Ohm matching sections for each band. Might need 3/4 for the 10m driven depending how far from the relay box. So does this NCJ article. ncjweb.com/features/jan
Totally agree with the prevailing sentiment that this harness is NOT for tower work. However it does a fine job of keeping deer hunters attached to their trees/tree stands. Wayne PS this would work y
Bill, Ditch the 450 Ohm window line. The antenna is not going to be balanced and the window line won't "balance" it for you. What happens to balanced line, doesn't matter the impedance, when it becom
Not nearly enough information. You won't know till you try it. I am considering purchasing a Icom 7610 to use with my C31XR with separate feedline and 500 watt linear. How much filtering do I need to
OK Tower Talkers. I need wisdom and guidance. I am finally in a position to start building my retirement station meaning a BIG upgrade in the tower and antenna department. Here is my plan. 70? AN Wir
I'm planning one now and am using the Projected Area number on the JK site. JK Mid-Tri = 16sqft JK 12/17 Jr = 7.8sqft (I use 8) JK 402T = 9.3sqft ( I use 9.5) 20 foot out the top 3" mast 5 sqft All t
I posted similarly a couple weeks ago and got some good advice from the reflector. It's come down to the JK Mid-Tri/40 and the Optibeam OB12-4W. The JK is 40/20/15/10m, the Optibeam is 40/20/17/15. T
Exactly. Milled aluminum that are bolted to the element plates. The elements are installed using polyamide clamps on the bottom of the element plates. Look up polyamide. Kevlar is a polyamide. The bo
Is there an online calculator for acceptable tower heights within say 2 miles of an airport runway. I am 1.71 miles south and east of the end of the 5/23 runway at Des Moines International. I am of t
Found it. http://wireless2.fcc.gov/UlsApp/AsrSearch/towairSearch.jsp It seems that my hacienda is inside of a 10,000 foot radius which sticks me in the 100:1 zone. 9, 028 feet/100 means I'm good up t
Whoopsie, I estimated my hacienda elevation at 928. It's actually 901.5. Makes a difference in the Towair calculator. The 5/23 runway at KDSM is at 915.6 with a 0.4% UP gradient. R. Kevin Stover AC0H
I read in the reg that if you have obstructions, trees, that are higher than your planned tower you are exempt as long as you keep the tower lower than the trees. R. Kevin Stover AC0H ARRL, FISTS, SK
These are epoxy powder coated steel not fiberglass. http://www.kf7p.com/KF7P/JunctionsBoxes.html R. Kevin Stover AC0H ARRL, FISTS, SKCC, NAQCC. "If it doesn't work the first time you push the button
So...1/4 wavelength vertical on 80 meters, 65', and add top loading for 160 or 1/4 wavelength on 160 and try to figure out how to load a 1/2 wave vertical for 80m? The property I am buying has a humo
Hello all. I seriously considering a 4el SteppIR 20-6m and a JK Antenna's JK402T with the 402T above the SteppIR around 20 feet. Obviously the elements of the SteppIR aren't going to be a problem for
I'm about to make a decision between the 4 el SteppIR 20-6m and the 16 el version of the Optibeam Log-Yagi. Whichever way I go that antenna with the JK402T I'm going to stack above it will be turned