It's difficult to do that without considering how the antenna works, or is intended to work. When you place (an effective) choke balun on the coax, you are essentially insuring that the coax does not
This has worked for me. I don't have a big signal, but it works well enough that what I can work is limited as much by receive noise as by my transmitted signal. In my case, I don't have a "good grou
"Stops" harmonics? "Very low?" That isn't a spec, it's a sales pitch. In fact, there isn't a single "spec" there! Real specs would include attenuation vs. frequency for specified load conditions, rat
Pete -- take a look at the following link, which is an applications note I wrote for audio system RF suppression. The chokes described would work quite nicely to suppress common mode current on those
As a starting point, consider the Mapper program that is part of the FREE Ham Radio Deluxe suite. You can display the azimuthal map centered anywhere, then print it on whatever printer you have avail
Here's an EE's explanation for a Liberal Arts guy. :) First, let's look at the PERCENTAGE bandwdith that we're trying to cover, because that's really what drives the design. 160m -- 10.5% 80m -- 13.3
Jerry was at Dayton this May and spoke briefly at a forum that I attended. He was sponsored there by a mfr, don't recall who, and it runs in my mind that they may have re-published this book. I have
tower. The answer to both questions depends on the answer to two other questions -- 1) how much current is drawn in these two circuits when they are in use, and 2) at how low a voltage will they func
I'm contemplating the purchase of a house and land in California that has granted an "Open Space Easement" to the county in exchange for tax relief. The land is mostly a redwood forest with a small h
Santa Cruz Jim _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041
I thought of that, and just went to their website to try to do that, but everything seems to be restricted to members only. Can you (or someone else) help by posting for me? Jim _____________________
It's important to understand what these devices do. These "whole house" units are simply BIG MOV's that attempt to conduct the surge to "short it out." In doing so, it must GO somewhere -- that is, c
A surge suppressor conducts when there is a noise spike on the line stronger than it's threshold, and that spike flows to the "ground" wire. Any wire, including one we CALL a ground wire, can act as
www.pricewheeler.com Yes. This product is based on (and licenses) the same patent as the SurgeX. The Brick Wall product is made for the home market, while the SurgeX product is made for the pro audio
Most of what I have read on the topic suggests that copper close to the base of the antenna provides more bang for the buck than copper more distant. On the other hand, more copper is better, no matt
More comments from my experience over a couple of years. I bought several thousand feet of the very nice black sheathed dacron rope (with a white center) sold by Davis RF (and others). I installed ab
I'm seeing some overheating that can only be in one of two possible components. One is a TenTec 238 antenna tuner, the other is the loading coils in the antenna that I'm feeding with it. I've also ob
The analysis that helped me the most in understanding transmission line behavior is the Smith Chart. The center of the chart is a pure resistance equal to the Zo of the transmission line. At one end
Sub 1% accuracy? Are we talking real world or fignewtons of someone's overactive imagination? Stray effects in real antennas, especially those built and installed with finite budgets, are going to sk
I'm thinking that I want to buy a Toyota Sequoia (an SUV on their Tundra truck frame) or Land Cruiser. Does anyone have HF mobile experience with either of these (or other big Toyotas or equivalent L