** I used to see 5w in my Beverage antenna during Tx until I added a coax-shorting on Tx relay. Another possibility is backto back hot-carrier rectifiers. These should limit the RF potential on the c
I found the RFI source with a 2m yagi and an AM receiver. If a spark generates interference on 2m, it generates interference at 160m. The offending spark was occurring at the corroded, twisted joints
** in my experiences, a cw rise-time and/or fall-time of under 2mS will produce key-klicks. There are R-C wave shaping components in a radio's keying circuitry that can be changed to adjust rise and
** J. W. Harris Co. makes a 6%-silver/94%-tin solder that that works well on aluminum with Harris' aluminum soldering flux. This solder is corrosion resistant and it can be used with a soldering iro
/ Howard -- Water has a dielectric constant of c. 79 whether it is salted or pure, so for RF purposes, a freshwater marsh conducts as well as a saltwater marsh. cheers - R. L. Measures, a.k.a. Rich.
? MF/HF current penetrates only a few inches into garden-variety soil, so conductors buried deeper than that are about as beneficial as teats on a boar hog. Soft copper tubing buried horizontally ju
// As I understand it, according to U.S. Army research in the early 1950s, HF current disappears rapicly below the surface of garden-variety soil. According to resistance measurements on this acre,
I solved the BCI problem by using a high-pass L-network (series-C, shunt-L) to match the high-Z Hertz antenna to 50-ohms. The second harmonic was still down 59db. cheers, Rudy - R. L. Measures, 805.
// The problem is untraceable money. Manufacturers of RFI-prone electronic equipment donate "soft money" to the approiate political party for the tacit use of politicians who will restrain the FCC f
// As well there should have been. The intrinsic problem with a 1/4 wave sloper antenna is that two currents of opposite polarity are traveling pretty much in the same direction -- i.e., toward the
// I had the same problem, Arne. The fix was to use a highpass (shunt L, series C) L-network to match my antenna. Even so, the second harmonic was c. 59db down. - R. L. Measures, 805.386.3734, AG6K,
// In this neighborhood, the source of electric fence RFI was sparking at twisted wire splices. The fix was to solder 'em or to apply conductive silver paint. cheers - R. L. Measures, 805.386.3734,
Chicken wire is twisted together. Welded fence wire makes better electrical connections. For lightning grounds and RF grounds conductors at the surface are best. cheers - R. L. Measures, 805.386.373
// Tree sap contains water and minerals. My guess is that living trees absorb RF. cheers - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end
// I used to run a 3-wavelength 8-ft. high beverage for 80m longpath into N. Europe. I found that there was a change in ground conductivity depending on rainfall. To be able to adjust the terminatin
I initially used a top-loaded 75-ft tower for 160m. The R part of the feedpoint Z was under 10-ohms. I reasoned that an antenna with more Z might be more efficient. I installed a halyard at the 75-ft
// I used surplus Gibson-girl 500-kHz emergency beacon hydrogen-balloon tether wire, This wire is c. #20ga,, made of a Cu-Cd alloy braid over a glass fiber core. It's strong, lightweight, stretches