HFTA was written for horizontal polarization only. Hardy N7RT chops to do it. We'll see. The calculations for vertical polarization are much tougher to implement. For H-pol, you can make the "soil is
I have been wondering myself about 6 mtr height. CT1HZE says about 50 feet. I have mine at 70 feet. We will see. I am in Florida now. 73 N7T/4 --Original Message-- From: TowerTalk [mailto:towertalk-b
Steve, et el, That brings up an interesting question. At what height does ground reflection gain start to disappear? I have to put my antenna at 70 ft because of guy wire interference. That's about 3
I had quads for years but the heat and UV of the AZ sun really did them in. I even had the Lightning Bolt fiberglass arms and they too broke. (I think he went out of business.) It was 5 el on 20, 5 e
I have used LDF4-50A & LMR400 for years. No more RG213 except for short jumpers. I bought a lot of this many years ago and it still tests good. Just my results. Pay for the good stuff once! 73 Hardy
All, I abandoned PL259's, SO239's, etc years ago. I found many coax switches, couplers, were made with N connectors at prices that I could not pass up on surplus markets. They are truly 50 ohm, water
If this is what the manufacturer recommends then fine. I have cleaned, reassembled many small propitch rotators using white lithium grease. The duty cycle is almost zero and the gearbox oil is the sa
Ivan, My concern is low winter temperatures and the increase in viscosity which cause an increase in drag on the system. I don't see why 30 weight oil can't be used. Another lawyer getting CYA I thin
These towers are temporary cell site towers to handle situations like Katrina and areas of population growth make it a requirement to maintain phone communications. IMHO they would be ideal for ARRL
Surplus Sales of Nebraska sells a panel mount F-female (that have an O-Ring that makes them very close to being waterproof) for a very reasonable price or at least I thought so. I think I bought a 10
Hi Rick, Gerald, and everyone, I have used the ladder line in the 4 Beverages I had in AZ. They were short about 330 ft and did not really have much F/B ratio which I thought was about right the way
Rob, I would switch in an inductor for a reflector and a capacitor for a director at the CENTER of the element. Use a shorted stub for the reflector and an open wire stub for the director. The voltag
Dave, Just a FYI, the bolts you are using are not for Rohn tower. The correct bolts are made for Rohn by someone and supplied when you buy the tower sections and the bolt package so that the threads
Surplus Center in Lincoln, NE has nice 4 bolt and 2 bolt flange bearings. I bought a 2" 4 bolt for about $24. Their 3" is $56. Google and see their website. N7RT/4 Try wheel bearing grease or the whi
Yes they are made in China which is a plus because I had to have a friend bore out about .005" so my DOM mast would slide in. The bolt pattern fit my Rohn top plate. Life is good HiHi N7RT/4 Wow the
Delrin has very limited life in the heat and UV. I lived in AZ for 35 years. N7RT/4 For amateur use, you could probably buy a slab of the appropriate plastic from Cadillac or McMaster-Carr, use a hol
UHMW PE has a horrible coefficient of expansion. I don't know about Nylatron. N7RT/4 --Original Message-- From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of charlie@thegallos.com
Yes. Ron K6EVR, Bud W6VPH, et al were in Pasadena in about 1968 making RF Speech Processors for the Drake C Line and other radios. I stopped by on my way home from ASU during semester break. Just a h
I had a low horizontal 160 dipole stretched across my property and it was no good. Robin WA6??? suggested it because they had one in Burma and it was a good RX antenna. But YMMV... 73 N7RT Has anybod
I think the lawyers also had a hand in the wording to protect the company. 73 N7RT That's where the urban myth came from. It's on tower manu- facturers plans but it gets misinterpreted as gospel. If