Al: I bought my Cadweld One-shots from RF Connections last year. I concur with Kelly's recommendation. (The usual non-employee disclaimer applies.) One observation: The pyrotechnic display from a One
TT: Valmont is/was also well-known to us in the electric power industry. They were a major supplier of steel poles for power lines, too. FWIW. 73 de Gene Smar AD3F --Original Message-- From: BobK8IA@
TT: Last year some time I mentioned in a posting that some parts of the = world may not be able to afford or find what we in the US call proper = tower building materials, and local hams must then us
Mel: Try Trenwa (it's spelled correctly as shown and I don't have a URL). My former employer, an electric utility company, used to use Trenwa precast concrete trench products in routing electrical co
Jerry: There's nothing wrong with PVC pipe - I used it in my own tower project last year. Works great! I assume Mel has his reasons for considering a cable trench vs conduit system at his station. I
Dave: I agree with K7LXC - do as much with the crane as you can (tower, mast, antennas, etc.) If for some reason you can't keep the crane after the tower is up ($$), I'd recommend putting the mast in
TT: I have to admit that yes, indeed, the gin pole did bend a bit when we hauled up the 75 pound Yagi and very noticeably when we hauled up the 120 pound mast. If I had/have to do it again I'd probab
Rob: For the past three years I've been working on a wireless telephone project in Haiti, just a short plane ride from Miami. Our network consists of many self-supporting towers that we specified to
Hisashi: You can fabricate something that looks like a commercial set of such clamps. (I found a set in Microwave Tower Service's catalog for the local hams to use at our repeater site.) You'll need
TT: The following three articles by Dick K5IU are (were?) available through the ARRL back issues of Communications Quarterly: o "Determination of Yagi Wind Loads Using the 'Cross-Flow Principle' ", b
TT: I agree with Randy (again) that David ought to rent a concrete vibrator - this will aid in getting the entrained air out of the mix, resulting in a stronger pour. However, this compaction by the
TT: FWIW. When I built my Trylon last year, I followed N3RR's advice (based on his experience with AB-105 (erector set tower construction). After I had the bottom three tower sections erected on the
TT: K4OJ's explanation is another way of saying energy is conserved. With or without the pulleys the work is the same, e.g., 100 pound tower section hauled 70 feet up is 7000 foot-pounds of work (ene
QRP DXCC = 100 pairs of good ears. 73 de Gene Smar AD3F --Original Message-- From: Tom Rauch <w8ji@contesting.com> To: Towertalk <Towertalk@contesting.com>; NN7K@reno.rmci.net <NN7K@reno.rmci.net> To
Bill: Check out a posting from Tom N4KG dated Jan 7 of this year in the TT archives. It contains a lot of good performance and installation info on slopers. GL es 73 de Gene Smar AD3F --Original Mess
BIP/BOP pigeons? 73 de Gene Smar AD3F --Original Message-- From: Hisashi T Fujinaka <htodd@twofifty.com> To: towertalk@contesting.com <towertalk@contesting.com> To: <towertalk@contesting.com> Date: T
David: I had been unable to find coax shield grounding kits for RG-213, the material I used in all my tower runs. (Most of the kits I found were for hardline-type shields of larger diameter than -213
Phil: Thanks for reminding me - I DID see those connector blocks (maybe not from ICE) but decided against them. I think it was because of my concern for dissimilar metal corrosion - AL block and CU s
TT: This construction of shorter, more numerous towers is known as cell splitting. It's how cellular/PCS network operators can increase the number of RF channels available to subscribers in a market
Don: I printed a copy of the referenced web page. Thanks for the info. Could you explain the purpose of the Allen-Bradley SLC-500 and where you got it? It seems like this is an especially important c