Mapquest (www.mapquest.com) has aerial photos (from globeexplorer's database). After entering a location, the street map is displayed, but if you click on the "Aerial Photo" tab, it switches to that.
I recall that the Los Angeles Times published a photo of W6AM standing at the top of his tower (at his house, not the rhombic farm) when he was well into his 80s, but then Don was one of a kind. Bob,
A better choice than RG-142 would be RG-400, which has the same dimensions and teflon dielectric, but instead of copperweld has a stranded center conductor (as does RG-303), making it easier to wind
Dunno. Since "RG" no longer implies mil-spec, perhaps some manufacturers have switched to solid copper for non-MIL-C-17 products. The Belden catalog shows silver-plated copper covered steel (Belden A
I'd be very surprised if it didn't beat the LP. In a log-periodic dipole array, the elements closest to one-half wavelength radiate most of the energy, which limits the gain to around 6-6.5 dBd maxim
I checked the U.S. Towers website and found a detailed drawing for the foundation which also showed 5 feet square by 6 feet deep. This was signed by a professional engineer making it more "official"
When I moved to Arizona in 1984, I was quite surprised at how restrictive the CC&Rs were in an unincorporated area outside of Tucson. I couldn't find any newer developments that didn't have outright
On a jet there are other factors to consider, as well. At speeds of several hundred knots, the impact of rain on the radome can tear up the paint and possibly the fiberglass, as well. Radome manufact
I've remember some "no ground" 1/2-wave VHF verticals (Larsen, I think) which had a small tapped coil at the bottom. I think they were intended for mobile use with cars having fiberglass bodies. The
For a typical HF installation, the difference will be insignificant. VSWR will increase the loss in the transmission line, but this won't be an issue unless the VSWR is much higher than 1.5:1. Chapte
You could probably use the demo version of EZENEC and get a good feel of the performance. It's limited in the number of segments, but that shouldn't be a problem with a 2 element yagi. Bob, N7XY
My antenna measurement experience is not in the amateur sector, but all of the antenna ranges I have used had mostly Scientific-Atlanta equipment (now spun-off as M-I Technologies). See http://www.mi
Another method I have seen used is to dip the end of the wire into a ball of molten solder and then wipe off the residue. It takes a bit of practice, like many procedures. I also recall (from a long
K7IM, who lives on the waterfront at Bainbridge Island, WA. has had a 3-element SteppIR up for over a year with no problems due to saltwater. He will be adding a SteppIR vertical soon. Bob, N7XY -- B
There are also hammer drills with conventional chucks. These tend to be somewhat lighter duty than those with SDS chucks (and less expensive, although $64.95 is far cheaper than any SDS drill I have
I assume you mean type N connectors. Quite a bit. I suggest that you use RG-214. I worked with a piece of 10 GHz test equipment once and someone had made (~5 ft) cables with RG-213 (equivalent to RG-
All was revealed in QST, November 1984 (http://www.arrl.org/members-only/prodrev/pdf/pr8411.pdf). Summary: It contains several resistors and a matching transformer. I wouldn't spend any of my money o