Fellow TTersOur local radio club sold a Hazer H3 (the one for Rohn 25 tower) that we had inherited from the estate of an SK to a military guy overseas. Since nobody was familiar with the animal we di
Those bolts do seem to be a bit hard to find. According to Fastenal's website, they have them in stainless socket head cap screws for around $2.50 apiece. And they say there is no inflation. I wonder
I will echo what Jim says about Hector, XE2K. W7EE and I spent 2 days helping him dismantle a station in Montana last year. I have never encountered a man who gets even half the amount of work done o
Hello TT'ersI am contemplating the removal of 700 feet or so of LMR600 that is buried inside conduit (not sure what size but probably 1-1/2 or 2"). It's been in service for maybe 5 or 6 years. The fi
You can do both of those plus a lot more with AC6LAs Auto-EZ. And at modest cost. No connection, just a satisfied user. Tom Hellem K0SN _______________________________________________ _______________
DonI modeled it in EZNEC. It shows that the azimuthal pattern is shaped very similar to a regular dipole, but the lobes are centered on a line that bisects the 90 degree angle formed by the two legs.
I have a Johnson KW Matchbox that doesn't seem to be working quite right. It's very hard to accomplish a perfect match at times even though the load is well within the claimed capability of the tuner
RobI think you are on to something. My tuner still has the link (primary) coil, but the relay has been removed, and the lone tap is one turn or so from the grounded end, which as you suggest is for a
EdI did find one website touting the Annecke tuner and suggesting a mod for the Matchbox that I might try. It involves adding a 4 position switch and using it to tap the link coil in several places,
HI Tom, K0SN, I have tapped the input coil on a Matchbox. I have taps on 5 turns as I remember. This greatly expanded the matching range. As I remember I used 270 pF air variable in the low side of t
TT'ers: Does anybody know of sources for the base and guy rings to be used on Rohn 45/55 rotating tower. I found RTS Systems and K0XG on line. Are there others? Tom K0SN _____________________________
Thanks to all who responded on the source for guy rings. It seems this universe is pretty small, but luckily there are a few. Tom K0SN _______________________________________________ ________________
JoeThe best tool I have found is AutoEZ by AC6LA. Playing around with taper schedule in it is so easy it's ridiculous. It's well worth the small price he asks for it. For a 6 meter beam I don't think
I wind my own on a toroid doughnut per K9YC cookbook and place it in a plastic NEMA box. Then fab an alunimum plate and fasten it to the existing element mounting brackets, and attach the box to it s
JimMy vote would be to optimize it using Auto-Ez with EZnec . Might be able to squeeze a db or two more out of it vs. the old design. Tom Hellem K0SN _______________________________________________ _
AlexTry a wire brush, then touch up any damage to the galvanizing with cold galvanizing compound. Rustoleum and many others sell it in a spray can. Tom K0SN __________________________________________
An alternate solutionEvery time I have seen or worked with swedged tubing on a beam, the swedged portion has reduced the diameter by 2 sizes, for example 1 down to 3/4 o.d. You can accomplish the sam
We have acquired an older US Tower MA40 and getting ready to put it up. Somewhere along the line in the past somebody made off with the raising fixture. I believe it consists of a piece of rectangula
MarkThe Rohn book specifies guying at 3 levels for 100' of R45. Top guy called out at 1/4" EHS, and other two at 3/16" EHS. I think you could safely assume that if you used Mastrant product equal in
SteveAll suggestions so far sound plausible. In the category of "what have you got to lose", I would try first sealing the conduit and cable combination at the point where it enters your box at the t