I've been using an anemometer made by a company called InSpeed (www.inspeed.com). They offer several different systems, but the basic cup-type sensor (which they sell separately for about $50) puts o
I don't disagree with most of what you've said about actually getting out there and building antennas. It's a huge part of the enjoyment I derive from this hobby. That being said, it's not easy to co
As best I can tell, that claim has never been substantiated and I strongly suspect that it is urban legend material. Are you aware of any specific instance where that has happened? If so, could you s
That's an incredibly silly statement. How does the ham avoid erroneous claims that his tower was the cause of a decrease (or lack of historical increase) in surrounding home values that might otherwi
I'm not sure I'd want to soak the roots of a 100 year old oak tree with a heavy salt solution ... Dave AB7E _______________________________________________ ___________________________________________
Someone on the Towertalk reflector recently asked whether an additional one db of antenna gain was worth pursuing. The answer, of course, was that it all depends upon how close you are to the noise l
Let's clarify some things here before this starts wandering all over the place. 1. I wasn't trying to splits tenths of a db in terms of impact. It was intended to be a simple relative comparison with
None of that has anything to do with my posting. I only referred to the original question posted here a couple of weeks ago (by someone whose call I've since forgotten), which was "what is an additio
Stupid typos on my part. The proper links to the audio files are: http://www.mediamax.com/ab7e/Hosted/Signal_Comparison_A.mp3 http://www.mediamax.com/ab7e/Hosted/Signal_Comparison_B.mp3 There is an u
Great pictures! I notice that none of the single elements were damaged, though. It was the multiband elements (secondary band elements supported by a primary element) that became bent. Obviously the
Check the May and June issues of QST from 1998, as well as the July/Aug issue of QEX from 1999. The W3NQN designs are highly regarded and are the basis for the excellent filters sold by Array Solutio
"Is the element length for 50 ohm Z always the length for best performance?" Certainly not, but I'm pretty sure that isn't how the SteppIR works anyway. I don't own a SteppIR, but as I understand it
First of all, thanks for the excellent information provided in your tutorials and reflector postings. Per your comment below, I'm curious why I don't hear people using small diameter high-flexibility
Wouldn't it be simpler to design a proper line driver that would interface the SteppIR controller to a long cable? Dave AB7E _______________________________________________ __________________________
That isn't necessarily true, as the discussion on this reflector just a couple of weeks ago illustrated. There are other real life factors beside ground resistance that can affect the real part of th
My first reaction is that 27 ohms in a real life situation with nearby trees and buildings is pretty close to a theoretical 36 ohms for a monopole in the clear over a perfect ground, and possibly wit
I totally agree. Due to neighborhood considerations, I've used a lot of different verticals in my ham radio career and I've done a lot of experimenting with them. It's not difficult to achieve a pret
They appear to have some nice marine hardware. Correct link for winches: http://seasense.com/cgi-bin/htmlos.exe/004.2.3281630298700017432 Online dealers: http://seasense.com/cgi-bin/htmlos.exe/004.5.
You may want to try to research previous permit requests that have been previously challenged in your area. I don't mean just for towers ... I mean for anything that may have had objections from neig
I can't think of a single structural reason ... the stress vectors should be the same either way, I believe. It seems to me that one practical downside would that you'd get more dirt in the joint tha