Gary When you say "spring maintenance," are these existing antennas that exhibited 1:1 SWR at a previous time? If so, what changed? Or are these new antennas you have just installed? In that case, si
Jim For my Yagi feed point I bought a 50' flexible 3/4" garden hose, cut off the ends and ran the coax through it before terminating it. The hose protects the coax and provides a good grip for tie wr
I put my 3" conduits 18" below grade, to avoid critters running into them above ground. Probably not a problem if your conduits will be as high as your roof. 73, Steve N6SJ My tower is located 17 fee
I used this same technique pulling my coax runs through 3" electrical conduit. Also, I used a swivel rated at 200 pounds working strength where the pull rope attached to the cable bundle, to allow th
John Interesting technique. My tower's foundation is in weathered sandstone, and the excavator came with a jackhammer attachment to break up the rock before scooping it out. Different soil conditions
Mac I had a 40' tall Rohn 25 supporting my 2-element cubical quad for many years. No guy wires. Survived 75 mph gusts. It had a house bracket under the eaves. If your soil is a problem you might be a
My full-sized 80M dipole is strung between two Douglas firs. At the end of the rope over the pulley at one end I use a gallon paint thinner can with the top cut off and filled with concrete. It rides
Spot on, Kelly That's why in the microwave radio world, for frequencies above 18GHz, we built radios with the transmitter output bolted right onto the back of the antenna feedhorn for zero transmissi
Alex Looks like Rohn 25 to me. I had a 2-element cubical quad at 40' on one for many years, but would never have thought of putting anything bigger on it. 73, Steve N6SJ Hi all, A friend of mine got
Guys, you're all correct! The current Rohn 25G has Z-bracing. But my old tower looks exactly like the photo Alex sent. It is still standing behind my parents old house in Sacramento, where it went up
Kurt K7NV makes the one I'm using on my Orion. Very HD! 73, Steve N6SJ --Original Message-- From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Craig Miller Sent: Wednesday, Octobe
I second Rick's suggestion. I have an 80M dipole up about 80 feet fed with open wire line. On 160M I short the feedline together in the shack, and with an antenna tuner use it as a top-loaded vertica
Mike You're exactly right. I put up a lot of microwave towers working for Harris Corp. The structural analysis had to match the path design. If I recall right, at 6 GHz, the 3 dB points on a 6-foot d
We have a cousin who is legally growing in a legal state. He says he has his lights on roughly 12 hours a day in his blacked-out warehouse, to simulate dawn-to-dusk sunshine year-round. So if the tim
Dick Sure, because the open wire has very low loss. The 10dB you lose operating the 40M dipole on 20M is mostly heat warming up the dielectric of the coax as the signal reflects back and forth on the
Jim Actually, undisturbed soil is not an urban myth, it's just the simplest way for the engineer to calculate the foundation design. The vertical walls of the undisturbed soil create friction against
I brought them a case of beer last week and thanked them for all the good times I have had at that store over the years. It will be sorely missed. 73, Steve N6SJ The same thing happened to our last h
I had a 25G, and coated the mast with white lithium grease where it went through the top tube. Then clamped an inverted "no-hub" plumbing fitting onto the mast just above the top of the 25G's tube to
For my US Tower HDX-589 I had a local company, San Jose Rebar, fabricate the cage using US Tower's foundation design documents. The price was $525 and they loaded the ~ 500 pound cage onto my pickup
Rich What standard is Tashian using, perhaps TIA-222C? My HDX-589 was designed in 2011 under TIA-222F. TIA-222G is the latest. The later revisions significantly tighten the allowable wind loads. 73,