Side note on cordage and rope. I have found Pelican Rope Works has many types of material. I got a quote of $100 for a 1000 foot role of 1/4 " polyester 12 strand braided. Average tensile strength of
When building a multi element array, I have had to put in odd phase shifts to properly achieve the pattern I wanted. Using different lengths of feed line works, but is obviously difficult to adjust.
Tin or metal roofs have a bad habit of also generating TVI/RFI due to the poor connections between panels. I have no cure other than bonding the panels together, had work and sometimes impossible. On
A simpler antenna that produces a similar pattern is the "eggbeater" Two circles at right angles fed with a phase shift network. M2 sells one now, KLM developed it in the 70-80s. It produces a satell
Just a point of clarity, a gin pole is also the structure that is used to erect an assembled tower/antenna/pole from a horizontal to a vertical position. See other post on how advantage achieved. A g
Any bridge device that uses the reflected signal for amplitude and phase information will be disabled by a moderate to high RF field. The filter that MFJ sells for their 259 does not eliminate the pr
On the Grainger issue, their website has an online catalog. www.grainger.com Have you tried "Grainger" Industrial Supply? http//www.grainger.com This company is phenomenal with what they have in cata
I have lowered the big vertical. I have a few shots of it coming down. It can be viewed at <http://www.geocities.com/lm2000us/chinagulch.html> Look at the bottom of the links for the 3850 group. Here
You didn't say if they were coax, open frame etc. I went through the same search last year and only found one old manufacturer of open frame ceramic spacer, Leach. They are still around at Fair Radio
Rohn recommends placing the bottom section of the tower, that has hollow legs, into a 4 - 6 inch bed of loose gravel UNDER the concrete base to allow drainage of any accumulated water. Wouldn't it be
According to the Rohn Drawing number B870725 for 25, 45, 55, 65 towers, They depend on the galvanizing of the legs to protect the bottoms and inside of the leg that is in the gravel, and at the depth
Please be careful on this one. My Rohn tower required 3000 psi and that made it mandatory that the inspector take samples DURING the pour and it takes a 7 day strength reading and a certification at
Well, it's coming down in June. Any interest needs to be made before 6/15/01. Thanks for all of the past interest. See you on 160 this winter. Mel Farrer Director of Engineering Tality Corporation 55
Only problem I have had is side mounted thrust on a single pin mount. It tends to twist the tower in gusts. I had to put in star mount guys to eliminate, undesirable torque. Agreed. It's cheaper, and
I am looking for a contractor in the Sacramento, CA area to erect a guyed 180 foot Rohn tower. Any recommendations? List Sponsor: ChampionRadio.com - Trylon self-supporting towers, safety equipment,
I have a self-supporting vertical used on 80 and 160 Meters, no traps. Currently in Bill Orr's latest HF antenna book. I am retiring soon and will not be using it in the new QTH. Full size 137 ft, al