Insulated or not makes no practical difference. The ground rods might be useful for lightning protection but will make little difference for RF. Refer to the 2004 NCJ article by K3LC for guidance on
Mike: One of the biggest misconceptions going around today is that ground level radials should be a 1/4 wave long. See the K3LC article in the April/May 2004 NCJ. There are many sources of informatio
For a given quantity of wire being available for radials, say 1,000 ft as in the example, making the radials one quarter wavelength long may not result in the most efficient radial system. 73 Jim ___
Not so Tom. Although much progress has been made with "no-clean" solders, dendrite growth is still an issue when pc board assemblies are exposed to humidity. To remove flux residues after waveline or
I'm no chemist, that's for sure. I was working as a manufacturing manager in a high volume electronics assembly plant at the time. But I will say all our efforts were directed at removing flux residu
In a message dated 4/3/2005 1:21:16 PM Central Standard Time, wy3d@usa.com writes: I had a guy tell me last night that he runs a vertical and a dipole on 80 meters in parallel so he'll get simultaneo
Nope, no jumping to conclusions here. And tnx for the info that so many of the guys are running stacked yagi's on 80 now. Wow....... Things keep changing faster than a fella can keep up with them. --
Guess I was lucky..........Had a HDBX48SAB (screw anchor base - no concrete) holding up a Hygain 204BA for a number of years with no issues. It was a neat tower. Because the sections nested, I was ab
I agree that the 75 ohm kw balanced line is impossible to find. I've looked and looked with no results. However, you can go ahead and use 300 ohm, 450 ohm or 600 ohm balanced line and have negligible
I've used a couple of the smaller Mosley tribanders over the years and they worked fine with the insulated, split dipole driven element fed directly with coax. Jim W9TM ______________________________
Hi Paul: Your measured impedence drops with the radials detached because there is less loss in the system. With an extensive radial system, your impedence should drop to the vicinity of 32 ohms with
Jim W9TM _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
In a message dated 5/23/2005 8:34:35 AM Central Standard Time, btippett@alum.mit.edu writes: Gotham Vertical copywriters are alive and well and now living at Tennadyne. ;-) I'm not sure why Gotham an
What CQ magazine article? Where? Jim W9TM _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Cal
Ray: I haven't owned an Aluma tower, but I did look at the print of their free standing base. It looks amazingly like the EZWay tower free standing base I had back in the early 70's. I had EZWay's 50