Here is an excerpt from PolyPhaser's technical document titled Document Number TD1028: An interconnected concrete tower base can help the tower ground system: Concrete is a fair conductor and can be
Did you mean two sets of three guys? Yes, lightning can easily flash over insulators. And yes, not grounding the guy anchors put a huge potential across the concrete. But, take heart as there are pr
Tom: Even when flowing in one direction a waveform can contain multiple high frequency components and act just like AC. Lightning can never be treated like DC. This is difficult for me to comprehend.
My catalog is the Rohn Ham Tower Catalog and there is no page 25G-1 (or 2). The specs for 25G in this catalog do not even list any loading info without either guys or a house bracket. Keith NM5G Page
I have used stainless steel hose clamps to bond the galvanized tower leg to copper ground lead and have seen no adverse affects over the past six years. Keith NM5G I have read here before on the reac
Yes, I can confirm this configuration. Keith NM5G That's exactly what I mean. I didn't have any documentation when I was working on the unit, about a year ago, but that's the way I remember the conf
I agree that combining wood and metal helps with rigidity. You must make certain that the wood is sealed against the elements to prevent weathering. Fiberglass and/or epoxy coating makes it even more
Stainless steel threads have a tendency to gall, especially if the bolt is over-torqued. Once this happens, the bolt will not reverse and the head usually breaks off while trying to remove it. My exp
Good point. Use OEM hardware and you should be good to go. --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com] On Behalf Of KJ6Y@aol.com Sent: Tuesda
A friend here has a T-12 and Cushcraft 40M 2-el on his 100 foot Rohn 45, both turned by a Yaesu 2800. It has not failed since put up in 1998. But this rotator is almost twice the price of a T2X. I wo
I would hook up a balun to that balanced feedline and use the SO239 analyzer. Keith NM5G --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com] On Behal
I made the coax feedline too long and have about 4 feet extra at the current balun located at the Yagi feedpoint. What would you do with the extra coax? I am thinking of coiling it and taping to the
Two words: play dough 1. Take some rolled out like a thick tortilla and wrap it around the mated connector, then mould it together. 2. Make it yourself in the kitchen the night before. Put in plastic
Although my post was intended as a pun, you may have something here. A better choice may be "Silly Putty" which is a popular children's toy that comes in a plastic egg. It can be rolled out like a to
Perhaps you have never seen a Rohn bolt. They are indeed galvanized grade 5 for 45G. Keith NM5G Hi All, On galvanized bolts the strongest that you can buy is a grade two, and if remember correctly Ro
Rain is hardly a concern in Aruba. It is a desert island with Arizona-type cactus all over the interior. The biggest problem with corrosion is likely on the coastline where there is significant sea s
No question in my mind. Sell the farm! However, if you have a spouse, discuss every detail before you make any major decision like this. BTW, I am located 4.5 miles from a GA airport that just happen
Yes, it is well shielded and will handle a kilowatt. However, loss is about double the larger RG8/213, LMR400 and other .4 inch cable. Keith NM5G --Original Message-- From: towertalk-bounces@contesti
Is there a minimum spacing recommended in a multi-tower antenna farm? I currently have a 150 footer up with a stack of four Yagis. The next one will likely be 190 feet for an 80 meter Yagi at top and