Hi. I'd like to replace my bent and buckled 67ft vertical (built out of junk) with a more sturdy version. In the UK I can get 6m (19.6ft) lengths of aluminium tubing but the question is what size/gua
Try this page: http://www.n6rk.com/irrigation.html 73s Tim EI8IC www.qsl.net/ei8ic/ Useful Maps and Newbie-Operator Resources Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with an
Thanks for the plug Tim :-) Some additional info not yet on my web site: I have made numerous scaled down versions of the 90 foot vertical. 60 feet of 3 inch (.050 wall) tubing works well when tilte
Finding tubing isn't easy. I've stopped at a number of businesses in farming areas with little luck. plastic tubing seems to be currently used. However, the following store in Bakersfield CA is a goo
I have been unable to find a supplier of irrigation tubing within a reasonable distance. The other metal tubing that I have been trying to find out more about, and, in some cases have found that they
A plastic vertical ? Hmmmm... What were you going to use for a radiator ? Put a piece of wire inside of it? The "weld" of PVC conduit is stronger than the pipe itself. It makes the 2 pieces of plasti
Chris -- I think you were originally looking to do a 20m high vertical (i.e., quarter-wave on 80m). My observations about your ideas: Electrical conduit is a relatively soft steel not designed for st
Hmmm, The stuff I saw on the rainforrent Web site seems entirely unsuited to large vertical antennas. They call it lightweight aluminum, which would suggest its designed to cross horizontal spans and
Use multiple wires, cemented to circumference, ID or OD, to create a 'cage' to broaden the bandwidth. I have three antennas, up to 58', that I use for field day, made of telescoped 3" and 2" aluminum
Could be, but N6RK, what is the wall thickness of the tubing you used? Next time I'm in that area, I'll stop by, talk to them again and get more info. 73's Jim
Hello to All, The question of a full size 1/4 wave vertical element has been bouncing around for some time now. Many years ago I recall seeing at a Radio Contest Club Meeting photos of a Four Square
Contest the to next horizontal For an unguyed pole, the engineering has been done for you. Go buy a 65 ot 70 foot flagpole. http://www.flagpoles.com/ is the website for Concord Flagpoles and they ha
It seems like one should be able to use one of the programs for mechanical yagi element design to solve this problem. An 80m yagi element should certainly work in the vertical position since its desi
. Can any mechanical engineers out there explain I take a stab at it.. the design IS basically similar.. Differences that may or may not need consideration are: 1) The Yagi design program will probab
If you want to see my 80m 4sq go to: http://home.att.net/~w8aef/wsb/html/view.cgi-home.html-.html It is guyed and it has survived 50mph winds. -- ZF2TA FO8DX FO0PLA 8Q7AA XZ0A -- de Paul, W8AEF -- Or
Standard irrigation tubing is 0.050 inch wall. "Heavy duty" tubing is 0.065 inch wall. There is some "center pivot" stuff up to 0.100 or so. For GUYED installations, I see no reason to use anything
John, that 71 ft. vertical with the dimensions that you gave will NOT WORK for long. With a 75 mph wind the following sections will be overloaded by 600 to 800 % of the maximum yield strength of 6061
Dielectrical antenna for 80mm ?.....but usualy its a horizontal polarization. Or should it be metalized pipes? What about skin effect on 80 Meter, power handling and HV on some part ? Might be a STEP
Severl years ago, Stefan, DL1IAO visited me and took a bunch of pix of my station and my 80/160 vertical. The main vertical portion is made from the boom of a KLM 4 el 40M yagi (3 inch dia., 42 ft lo