Yes. But: There is considerable misunderstanding (and junk science) regarding so-called "single point grounds." There is a tutorial on power and grounding on my website. While it is specifically writ
This is pretty far off the topic of this list, so I'll make my response brief. First, you are confusing the word "ground" with "signal common." In his excellent workshops on EMC, Henry Ott talks abou
I tried it in Chicago when I lived there, it worked VERY badly. I did this for a weekend contest, with a balun at the antenna. With 100W, I burned up the so-called KW-rated balun at the antenna (it t
Again, the word "ground" is poorly chosen and confusing. Earth, indeed, is not a necessary element of the antenna. A far better word is "counterpoise" -- that is, some conductive wire/plane/body that
For a balun of this type, what matters most is LOSS, not permeability. I would use a Fair-Rite #61 material, which has the lowest loss of any good material I know of. This is the material commonly so
Hi Doc, What exactly would you be doing with it on 6M? Tom was winding a transformer balun (that is, a voltage balun), for HF. Do you need a transformer, or a straight through (1:1) choke balun? How
Yes. These testers are attempting to measure the resistance of the path to "earth" at frequencies near DC. This may be repeatable, but it is of limited value for quantifying the effectiveness of a gr
It is alive and well. I'm subscribe to it, and one post will typically generate a flurry of replies. Jim K9YC _______________________________________________ _________________________________________
The likely problem is that various parts of the body have poor electrical bonding to each other, so your antenna is working against only a small part of the car's body. You may make a solid connectio
Expect the worst. The main computer in my Sequoia locked up when I called CQ on 20 SSB, thanks to the really awful chassis bonding noted in my previous post. Symptom: the SUV slowed to 15 mph and wou
N9GL, a real EMC consultant and EE based near Chicago, is a consultant to both ARRL and the FCC on the health aspects of EMI exposure. See the following for some of his work. http://www.arrl.org/rfsa
40/80 dipole? I found some 40M traps from a company called Hypower (www.freewebs.com/hypower) I bought one of Barry's 80/40 dipoles that uses a loading coil for 80 as a trap for 40. I used it in Chic
I agree with all of Kelly's comments, and would emphasize his advice for good bonding together of the various elements of the roof, both to make it more stable (and a more effective ground plane), an
On Wed, 16 Aug 2006 22:25:04 -0400 (EDT), donovanf@starpower.net wrote: While cable loss is certainly an issue, there are many other elements in the equation. Will the more distant location provide s
Yes. And not all hams have spare cash laying around. For many, it is a stretch to own one decent radio. The cost of a beam on a properly engineered tower could put a child through a year at some coll
BS! YOU implied that, not me. I stated that many hams don't have big money to spend on ham radio and must settle for far less than a beam on a tower -- like wires strung between trees, or between sec
You've only listed tower hardware at retail, which totals $4,800. Add taxes, typically 8%, plus shipping, 8% is probably a low number for stuff like this. Now we're up to $5,500. The antenna isn't fr
I strongly agree. Several months ago, I helped a local ham pick up a used tower from another ham and drive it 50 miles or so to his QTH. Two weeks ago, I was part of a crew of local hams who helped h
I'm not sure that there is such a thing. It's a combination of the laws of physics and the laws of economics -- that is, the circuitry will produce the trash, it costs money to suppress it, and the v
What is "superflex?" Do you mean "flexweave?" I tried some #12 on several antennas, and it broke in less than a year on all of them. I'm a firm believer in POC -- plain ordinary copper -- that I buy