Try Penninger Radio. Another possibility is ZeroFive Antennas. Those guys stock tubing. Call them and ask; don't go by what's on their website. Merry Christmas Rob K5UJ ______________________________
It's a hassle to share a photo by having to create a link to it. It's way easier to upload it as an attachment. I'm in favor of groups.io, BUT, it is only free if you limit members to 100 or less. Yo
Why can't it be guyed to help stabilize it? Even three ways at the top with dacron or kevlar to some deep earth screws is better than nothing, especially if you use cheap leg insulators. Most leg in
Elevated radials are finding their way into broadcast sites. Copper clad steel can be used, they are less prone to damage from copper thieves, and in some locations, make it easier to continue operat
Ignore that and focus on the original NR1DX post. Most of it squares with the physics of monopoles and their relation to earth and is easy to understand. Unless the only room you have for a ground s
If I had enough tower height for this I'd try a phasing stub at the center insulator and base feeding the bottom quarter wave over a ground system to have two 90 degree radiators stacked and in phase
According to the Workbench column in Radio World, 3M Cold Shrink tubing has come down in price. Available from Digikey and Granger. https://www.digikey.com/catalog/en/search?filters=32272 https://www
The "link" (that's the larger outer coil) originally had two taps. One just one or two turns from the grounded end. That was the 50 ohm unbalanced input. A second tap was a few turns over from that.
On C2 the top sections are in series with the balanced RF coming from the coil. If those sections are fully meshed you have run out of capacitance. Because 80 m. is 500 kc wide, the balanced line fro
Seems like some of you guys won't do anything if you can't model it. Just put in a good ground system, load up the tower and see what happens. A 20' tall building is a tiny fraction of a wavelength.
field when at or below grade is "ground system"; when the radials are elevated, as in for example a land mobile vertical up on a tower on VHF, is "counterpoise." I suppose they can be interchangeabl
Propagation is king, but hams can do things to improve contact probability and lessen the effects of fading. When I was in the Army we employed diversity reception and transmission to combat this. Th
Trailer (once they get to the tower) is enjoyable if you are scared of heights. https://www.youtube.com/watch?v=aa5MXOMN1lM Rob K5UJ _______________________________________________ __________________
After reading the mail on this topic, if I were the fellow asking the question, I'd decide to accept a lower height and put up a free standing tower. 73 Rob K5UJ _____________________________________
It's a good thing to do. It won't fully protect but it will add some X(L) in series with the strike RF. You frequently see a one turn loop in the feed to an AM tower from the tuning house for the sam
I'd scrap that whole BX setup and get a whole new installation that folds over at the base using a post, winch and cable. BX sucks for climbing anyway & with a tube inside, forget it. You could maint
You can also use curl. Macs come with curl and its man pages as part of the OS bundle along with Python. Google man wget or man curl to read about them. Sinking a tall skinny guyed tower base in con
Not saying this is true, but there are ways of cutting costs with off brand hardline. If the off brand is 1/2 the cost of the tried and true Andrew (Commscope) it may be okay, or it may for example,
https://www.kintronic.com/shop/aluminum-cabinet/ Rob K5UJ _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.c
You can't go wrong with good insulators at the ends of a dipole or the top of a hanging monopole. Long ceramics or glass, dogbones, rope a couple or more in series, help minimize loss when the suppor