Hi Wilson, I just pulled a 50 year-old AR-22 (at least I think that is what it is -- I'm not at that QTH right now and can't check) that was used by me back in my High School days, and then by my dad
Just to make this "TowerTalk" compatible, consider the 901s a close-spaced, collinear acoustic radiator -- the frequencies are lower, but the math is the same. And it depended on near-field environme
Actually, we all know that close coupling eight identical resonant circuits will drive the poles apart and generate a rather lumpy, but flat response and this was all that was going on here. (The fro
Hi Jim, Of course I agree with you. This is true of any speaker system -- whether they are built with many identical drivers and an active equalizer (al la Bose 901s) or any other system using two or
Hi Joe, I have "played" with a 3-el 6M LFA from Innovantennas. Seems to play just fine although I have no way to check the true gain. It is very important to keep the balun away from the boom -- see
I still enjoy being JUST "A Boy and his Radio", 50+ years after I earned my license. And I enjoy the "Wires" overlay in the WPX too. 73 -- Larry -- W1DYJ -- Original Message -- From: <Cqtestk4xs@aol.
If I remember, part of the reason for these huge arrays was due to them being inside of the Auroral Oval. They needed them to compensate for the RF not getting out of the oval. (Yes -- very technical
I thought the rule of thumb was to space the rods at twice their length: 8' rods every 16 feet, 4' rods every 8 feet, etc. 73 -- Larry -- W1DYJ I only use shorter ground rods when I cannot push in a
Hi Brad, I would suggest you read HOW TO PLAN THE INSTALLATION OF MULTIPLE VHF ANTENNAS ON ONE MAST on the Directive Systems webpage: http://www.directivesystems.com/STACKING.htm. 73 -- Larry -- W1DY
Pretty much any auto-parts store will have trailer connectors. 73 -- Larry -- W1DYJ I carry the trailer connectors, http://www.kf7p.com/KF7P/Cables.html scroll to bottom. Also I suggest some dielectr
Hi all, I am building a homebrew 40M vertical with raised radials. (Yes, I have studied the N6LF and K3LC literature.) It will be sitting on a 10 foot metal mast. I am looking for ideas for mounting
Thanks Hector and Matt, I have already checked out all of the various places: DX Engineering, MFJ, etc. They all show aluminum alongside of the driven element in some fashion. My modeling shows that
Thanks Jim, I had already read your articles too. This will not be a multiband vertical. Just a simple, resonant 40M 1/4 lambda vertical that will sort of work on 15 as well, although with higher lau
Thanks Dan -- just the kind if simple idea I am looking for. You even have the "raising fixture" shown that is close to what I envision! 73 -- Larry -- W1DYJ Larry I hope that I understand your quest
Hi Bill, I have both tutorials. I bought them to "enhance" my use of EZNEC, which I have been using for quite a while. (I now use EZNEC5+.) I got through about half of the first tutorial and found th
Hi Bill, Glad that my response was useful and sorry for the delayed additional response. Your first Q: If I remember, and I was going through LB's tutorial a few years ago, I redid his tutorial model
There are at least three that I know of. I don't know if they all mount differently. http://k4kio.com/compare.html 73 -- Larry -- W1DYJ Howdy, TowerTalkians -- Tnx to those of you that passed along t
Hi Hans, I asked QST's "The Doctor" this question a number of years ago. I have attached a series of emails I received from a number of well known hams below. This is the best I have ever seen. It is
Actually, Dan's portion of WRTC should be pretty much accomplished at this time: team and referee selection. Of course, everyone involved in managing WRTC is pretty busy. 73 -- Larry -- W1DYJ --Origi
With my "adjustable black box" right after my transceiver, and no matter what it says on the front panel, nor what it does theoretically to R +/- X, I always think of it as simply an "Antenna System