Attn N3RR: Does your site give specific info on using the Force12 5BA? It is the antenna I am concerned with fitting properly onto the Ring, not the ring fitting the antenna! If anyone has experience
I have learned from Steve Best, VE9SRB, that Cushcraft will be shipping the new XM240 near mid-September. Anyone wishing to receive one of these from the first run should call us asap to reserve one.
It is appropriate at this point in the loss discussion to move from the theoretical to real world. In the real world, the matched line would be 200 ft of RG213/U coax, the balanced line would be 200f
Ref the experiment to measure matched/unmatched transmission line loss: The added loss caused by vswr has already been tested and documented in past issues of the ARRL Handbook and Antenna Book. Ther
Hi Steve, I have followed the tower talk gain/coax loss comments with interest. You may or may not be aware that virtually all amateur transmitters and amplifiers contain tuning networks that are eit
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Pete, N4ZR mentioned fiberglas guy insulators in a recent post. The $50 price (three years ago) is actually very close to current Phillystran pricing for a similar setup. 21ft of 6700 lb phillystran,
Jim Miller, K4SQR is very correct about ham dealer e-mail resonse! We answer e-mail as soon as we can but we are not camped out on the internet just waiting for the e-mail to roll in. Our first choic
Like Tom, K5RC, I have also used the :"Stran-vise" fittings by removing the guts but I have also had a failure of one fitting. The part that forms a loop has a ball shape press-formed on each end of
Hi Dave, Glenn Martin is selling Phillystran but I have no idea why they don't mention the Phillystran name. Originally Phillystran recommended using cable clamps but later switched to Preformed Prod
Doc, K7SO writes about stacking beams on a Rohn 68 ft tiltover tower. Assuming he is referring to the Rohn Foldover tower, there is a weight limit of about 100 pounds for these models. The TH6DX ante
M2 also offers a kit of parts to add the OR2800 mast clamps to a prop pitch motor. You basically have a local welding shop weld an insert into the top of the prop pitch motor and bolt the rest of the
Almost every amateur antenna manufacturer is using 6063-T832 alloy tubing these days. This alloy was actually designed for furniture manufacturing and has a nice smooth and bright finish. The yield s
If you review the Rohn Tower Catalog, Foldover Section, you will find some examples of closer guying for 25G and 45G towers. If you go as close as the utility companies go with their guying, you will
Using 25G for a rotating mast gets you a lot of strength for a low cost. As Steve mentioned, you need to allow a wind load for the 25G itself which is on the order of 7 pounds per lineal foot at 70mp
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More on the three way vs four way guying question. WORST CASE load on the anchor is when the wind blows from the same direction as the anchor (one anchor takes ALL of the wind load). This is the same
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I just got back from "surfing" the K1TTT site and what a great resource it is! I stopped the address at www.berkshire.net/~robbins to get the full treatment. Well done K1TTT! 73 de K5GW -- FAQ on WWW