I don't know how the new ones are built, but I have an old 40' tubular tower that I think was built by Tristao (similar to the MA-40). The channel 'key' is (was) held in place by several flathead scr
I have been considering the US Tower MA-40 or MA-550 crankup tubular tower as they call them, closer to a tubular crankup mast IMHO. has anyone had any dealing with these in real world situations, th
This seems beaten to death now, but honestly, who can't support a 16' aluminum 2" mast by holding its lower four feet length, as anybody more than 5'6" tall could do, belted near the top of a tower?
The problem here is that this is like holding a broom by its last 3 inches, in a vertical position, and DOING something with it... sure, you can do that .. but not for VERY LONG ... and Jim has it ri
if you are using two pieces spliced why bother with the extension... typically a splice is synonymous with failure point, eh? Suspect you want to have about half of it in the tower and half of it out
Hi Joe, In the latest QST ad, which I just saw for the first time, the data appears very believable. Their on-line data sheet (last I looked, a week or so ago) states "20 to 50 dB" F/B on all bands,
For those who want better F/B on 10M with the SteppIR 3L Yagi, a separate 10M reflector could also be added which I expect would not degrade performance on the lower bands. That is a common practice
Steve, I didn't look at the Fludid Motion specs. but I know the antenna is not optimum on 6 meters and I doubt they make that claim. If you check the literature, you will see that they have an option
Roger that, Mike. But modeling indicates less than 15 dB F/B as best achievable on 10m, and about 12 dB on 12m; don't think the extra 6m element will help those, although possibly it does. Anybody h
Three elements, the standard configuration. I realize there's a stationary 4th element available for the 6m configuration, but don't know where they put it...will try to find out. -WB2WIK/6
Steve, There is an optional fixed 6 meter director available for the SteppIR that is suppose to greatly improves the F/B ratio: http://www.steppir.com/ Look under the "products" tab for the "6 meter
Author: rmoodyg@bellsouth.net (Richard M. Gillingham)
Date: Fri, 13 Sep 2002 20:09:12 -0400
Hi Steve. I have the steppir, but I'm clueless about modelling antennas. Only one question. Did you do the 6 M model for 3 or 4 elements. The optimum Steppir configuration is for 4 elements using the
Yeah, Mark, the real trick setup would be a stepper actuated telescoping boom with SteppIR elements attached (it wouldn't surprise me if they were already working on one). 73 de Mike, W4EF...........
Clearly, the next evolutionary level will be a StepIR on a 36' motorized telescoping boom. 73, Jerry W5KP fixed http://www.mscomputer.com additional 5 percent off
[Steve Katz] Mark, I have to agree. Unless this antenna defies all the modeling programs, using a 16' boom and fixed element locations provided in the SteppIR manual, and modeling using NEC, if I ad
Tony, In the past some people put the capacitor close to the rotator to free up 2 extra wires to parallel with others. This helps but I don't think the need for mounting the capacitor at the rotator
Ditto. Works fine doing it this way. Closer tot eh rotor the better for the motor start cap. Plus you get to double up two wires. It's a win-win. Tony N2TK --Original Message-- From: towertalk-admin@
Author: Robert Webb" <g0urr@btopenworld.com (Robert Webb)
Date: Tue, 18 Jun 2002 19:26:06 +0100
Hello everyone, I have a Cushcraft A3S only 6 months old with a slightly bent boom ( my fault ). So I am going to replace the boom. This led me to thinking, If the boom was longer and the elements we