Try these guys. http://www.portablewinch.com/ http://lists.contesting.com/mailman/listinfo/towertalk _______________________________________________ _______________________________________________ To
Should one weatherproof (i.e., tape) cadweld connections (Cu to Cu) that will be buried? I personally think it's a waste of time and material, but if someone can explain why it's necessary (that is,
Thanks to all who replied to my question regarding protection of Cadweld joints. All respondents confirmed my guess that it's not required. Thanks again for the help. 73, Jeff _______________________
Will an Andrews L45Z for 7/8" heliax work with Eupen 7/8" heliax? My gut feeling is no since the Eupen heliax outer conductor OD is slightly smaller than that of the Andrews equivalent. However, of a
While shutting down my station tonight after working the WPX contest, I accidentally flicked the power switch to the OR2800DC control box off and then back on quickly. When I did this, the display sh
Aloha Bill. I have several older 1022D model rings. I was able to install these on my 145 foot Rohn 45 tower by myself over the period of two weekends. I am sure if you had help it would go a lot
Sorry for taking up the bandwidth...just testing. Jeffrey K. Okamitsu, PhD, MBA +1-609-638-5402 _______________________________________________ _______________________________________________ TowerTa
Are Slipp-Nott mast clamps (rotator to mast and boom to mast) really effective? If so, where can I purchase them? 73, Jeff Jeffrey K. Okamitsu, PhD, MBA +1-609-638-5402 __________________________
Does anyone happen to know the OD of the legs of 45G tower? I need the info quickly and my Rohn book is at home. Tks es 73, Jeff W3KL Jeffrey K. Okamitsu, PhD, MBA +1-609-638-5402 _______________
Sorry for the excess bandwidth. 73, Jeff Jeffrey K. Okamitsu, PhD, MBA +1-609-638-5402 _______________________________________________ _______________________________________________ TowerTalk mail
Tom. I've modeled a 1/4 wave gp with one resonant radial (1/4 wavelength) using the dimension you provided using NEC4 and it yields an impedance (real part, at resonance) of 40 ohms. BTW, you didn't
I disagree with a couple of conclusions here. First, if the tower is indeed close to being resonant on 160, then adding radials (i.e., lowering the ground resistance) isn't going to change the reso
Sorry, I didn't make myself clear. Yes, absolutely the inv L needs to see an efficient ground. However, my point was it doesn't matter if the radials start at the tower or at the base of the Inv L
Another point of clarification... The assertion made regarding no difference between radials starting at the tower and radials starting at the base of the Inv L can be made due to the relatviely sh
Interaction with the tower has nothing to do with tieing into the tower ground but coupling between the actual inv L and the tower itself. See my previous post on how to deal with this. 73, Jeff W
For multiple radials laid on the ground or buried just below the ground, there is no "resonance" effect - that is, there is no such thing as a tuned radial for wires laid on the ground or buried just
I'm not disagreeing with the fact that for a small number of wires close to or on the ground that they will not have a resonant less than a physical 1/4 wavelength. What I am saying is that for a la
How are you setting up the W8JI parallel resonant circuit? I detune my 140 foot tower using the W8JI method because it was coupling into my 160 m inv L. Works great. I hang a wire from aboout 80 fee
In my career in pure research, R&D, and product design as well as leadership of R&D, engineering, and product development, I have worked with scientists and engineers that run the gamut from "it's ne
I'm looking for an OR2800DC to use as a spare for my existing system. I prefer to buy just the rotator itself and not the controller. If you have a unit that you're willing to part with, please ema