What are the transmit antennas on 80m Tom? Did you sweep the antenna and watch impedance vs frequency? What did you measure for impedance value, and what did you measure it with? my Yes, use more ra
You may not realize this, but the grounds are connected to each other anyway through all your gear, which has line bypasses between the chassis and the power lines as well a electrical safety ground
I'm curious about something. I have a friend who keeps calling power line "ground noise". I asked him where he got the idea noise was "ground noise". He said he didn't know, he just hears it called "
It is pretty well known among RF engineers working with high power, as well as cable manufacturers, that stranded wire is worse than solid smooth wire of the same size and the finer the stands the w
Try this connection: Pwr gnd--House gnd--equipment--shack gnd--ant twr gnd That is a bad situation because any hits any place will pass through the house and equipment in the house. No ground is eve
I'd disconnect it outside, and let it lay away from the house if possible. I would not ground it to anything, as long as I could get the wires loose and away from the building and away from valuable
That works perfectly well for short tests, and will last a long time if you put a reverse polarity protection diode across each capacitor. The power rectifier type diode would go cathode (banded end
Most manufacturers "tried" to use ~5dB as an S-unit, not six. Six dB was NEVER an industry standard, as a matter of fact there never was any industry standard by any sense of the true meaning of "st
The exact opposite is true. Stranded wire is always worse for higher frequencies, and lightning has considerable high frequency energy. Stranding (or worse yet weaving) is undesirable even with pure
I've never seen a connection unsolder, even with pure lead-tin solder but I suppose if nearly all of a big hit passed through a lead-tine solder joint it could fail. I doubt it would happen in only
Where can I get connectors for RG-17?? I'd like to get into a 7/8th inch EIA flange from the RG-17. I have 800 feet of brand new cable, but need to get into a EIA flange or some other standard conne
You forgot the fact that: 1.) Braiding has more resistance and impedance at high frequencies than a smooth conductor, even when the smaller solid conductor is much smaller in diameter. 2.) Stranding
Hi Tom, A nearby ham bought one and installed it as described in the instruction in a clear area. He had a sub-mobile-whip-signal on 160 meters, and wasn't much better on 80 meters. My low dipoles, a
Hi Ted, A few years ago someone from this reflector sent me an IAC Double Bazooka to test. Despite fantastic performance claims the Bazooka has about the same bandwidth as a regular wire dipole, is
That is a common problem. Ground each of the elements to the boom near the element to insulation junction. Use a choke coil of about 15-20 turns of #16 or heavier insulated wire about 1" or 2" in di
While it makes good marketing hype, the number of countries worked has little to do with transmitting antenna performance, unless something is seriously wrong. One reason so many people have dismal r
I've rarely is even worked over the poles on any band below 40 meters. For example, the normal path from here to Mongolia is SE in the evening and SW in the morning. Same for deep Russia and India o
Don't know. I'd sure try one or something else vertical with a chance of working (NOT a Gap or similar no-radial or small radial system dummy load) if I was serious about doing the best I could with
Radiation is a directly tied to ampere-feet of the antenna, where the sections carry currents whose radiation fields add in phase. As we make an antenna shorter for a given amount of applied power (
The length of feedline from the antenna to the measurement device will affect the measured resonant frequency, so you also must be sure the feedline is an exact multiple of 1/4 wl to determine EXACT