The definition of electrical resonance is when the circuit reactance is zero. An antenna has zero reactance and is only resistive at it's resonant frequency. A perfect dummy load has no reactance on
It sounds like we could debate the definition of resonance for days without reaching a consensus. So let's get back to the original topic: is resonance an important attribute of a good antenna? For e
The Rohn recommended foundation is 4'x4'x4' (3.5' below ground) for 25G freestanding towers. However, according to the 2004 Rohn catalog, 40' of freestanding 25G is only rated for 1.5 sq. ft. of ante
Check out the following: http://www.steppir.com/Catalog.html Click on DB36. It covers all bands from 80 to 6M. It is a dipole on 80M, 3el on 30 & 40M, 4 el on 20-10M, and 6el on 6M with an optional k
I have Rohn 65G sections that I plan to put up and have a question about the bolt flange plates. Someone told me (K0XG I think) that there are two versions of Rohn 65G and the flange plates (and corr
I'm trying to figure out why you want a separate 2 el 40M beam when the SteppIR DB-18 already has 2 el on 40M. 73, Clay W7CE _______________________________________________ __________________________
Check out the latest foundation plans on the US Tower web site. They have recently changed the drawings for their foundations and now require 16 pieces of vertical rebar, two in each corner and two i
Trying to find a decent QTH that doesn't have an HOA or restrictive covenants is becoming next to impossible. For most people, HOAs are not a choice if they want to live near civilization. I know tha
When comparing antennas, you can't just look at the maximum gain, you also have to consider take-off angle. When you add the highest yagi to the lower stack of two yagi, you will have a lower take-of
I have an Orion RX2800PX azimuth rotor controller connected to COM3 (on a PCIe card, not USB) and use Hyperterminal to control it for remote station operation. The info provided below by Codrut is ex
You can buy concrete form oil at any concrete supply house. The stuff I've used before smells like diesel. I've known contractors who just buy diesel at the gas station for their form oil. You can al
Hi Bill, I don't know if you ever received an answer to this, but you are correct. I just measured mine and the holes are 3" center-to-center on each side (not diagonally) and are 3/4" in diameter. I
I agree with Roger. the 3el SteppIR is a lot of wind load for a Ham IV without a thrust bearing. Look at the W9IIX RM-16 Antenna/Rotor mount for an idea of how to do this: http://www.w9iix.com/ii0001
Pete, thanks for pointing out the Custom Metalworks side mount. I wasn't familiar with that one, but I agree that looks like a much better solution, especially for a heavy yagi like the 3el SteppIR.
The M2 web site works fine here. I'm able to browse through multiple pages so I'm sure I'm not looking at cached pages. www.m2inc.com 73, Clay W7CE _______________________________________________ ___