This is a fallacy which should end. Higher is not always better. You can get into a situation where there are 10 or more lobes, and each of those lobes will take a portion of the total power fed int
Used to be pretty commonplace, but that was before the "big yagi" era. I've seen many which merely had a 2" pipe bolter to the top, with the rotor on the pipe, but don't think much of that idea. The
Does anyone have a copy of this issue willing to sell? Or, I could just settle for a copy of an article. Would the Library of Congress have a copy which I could get the 2 pages I need? 73 Ed ________
Guys, I now know the above subject magazine is not the correct one. The author's call was OD5CG, and it may have appeared in 73 magazine. Basically, the article gave a rather complicated set of formu
-- B I G tip of the hat to Dave. The first link shown discusses it exactly. And shows some of the fomulas. Haven't looked at the second link ( supposed to be down in my basement finishing off a bath
-- I may be misreading and/or misunderstanding Mike's post, but I get the idea he is driving rebar into the ground, and then pouring in concrete. If so, this is a big mistake. Rebar should never touc
-- I've forgotten where I read it, some survey published by a Washington State group of some sort, but they said concrete takes 78 years to reach it's full strength, and it is absorbing water all of
-- OK, from the above, I would suspect this antenna was designed with 3 elements on 20, 3 on 15, and 2 on 10. Or, it could be 3 on 20, 2 on 15 and 3 on 10. And of course, you can determine if that el
Just for what it's worth, K4KG's ( now SK ) windmill type tower is still standing. It is over 100' tall, and was custom made for him, I think by Telex. I would guess the bottom base section is about
-- I bid $50 for a front row seat. Will increase it to $100 if she rotates the beam while hanging him. Ed _______________________________________________ See: http://www.mscomputer.com for "Self Supp
-- Assuming the SWR is correct, you will lose 4% of the power transmitted. Say 40 watts at one KW out. 73 Ed _______________________________________________ See: http://www.mscomputer.com for "Self S
26.4 db at 1.2:1? Not to mention the 10 db. Ed _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more
"Antennas" by Kraus ( Vol 1 ) also has a good section on the above. Plus, I have a 1943 publication of "Fundamentals of Transmission Lines and Antennas" put out by Bell South which has almost all the
Author: "J. Gordon Beattie, Jr., W2TTT" <vze1u2wn@verizon.net> Date: Sun, 24 Apr 2005 21:26:20 -0400 Hi Folks! I'm looking for the Rohn TB-3 or TB-4 thrust bearings or any other flange type up to 4 i
Felows, I appreciate all the support 9 out of 10 of you have posted. I fully admit I was naive, and stupid. I also will not back down and let my friends be taken for a ride. So please, let's let it r
Yep, and like that I have where my crank up is installed. Guy who dug the hole had to leave twice to get larger backhoes. First 2 would hardly scratch the surface. But, more to the point, would ther
When I ordered my big 89' crankup about 6 years ago, it cost over $1400 for shipment. US Tower said they had so much damage on so many shipments that they were "threatened" by the shippers to refuse
-- Cutting rebar with a hand saw is not my idea of fun. I have 2 7.5" power saws and I keep one loaded with a 7 inch carbide metal cutting blade from Home Depot. 73 Ed ______________________________
Assuming the 27' Mark put in is the length of the boom, this antenna claims a gain 2.5 db better than my wide spaced 20 on a 48' boom. Maybe when pigs fly... 73 Ed ___________________________________
-- 2 other good choices for cleaning the inside are: 1. Brake hones ( used for smoothing the inside of brake cycinders ) Any auto store 2. Shotgun bore bristles. If mounted in a drill, it will clean