The DOD and military have done extensive research on EMP protection for command and control facilities so nothing can get in....absolutely nothing that they do not want to get in from DC to light. Th
Paul, I'm sorry my reference was to the Icom 746-Pro radio not the 756-Pro 3, a radio that I am not familiar with at all. Most radios with an external RX antenna input have some sort of internal prot
Use a long concrete bit to get started. Put some boiling water down the hole and if the freeze line is beyond the length of the drill then use a torch to apply heat to the rod while driving it in.. I
I write to you to ask for a big favor. I own an old YAESU FT-747 which final RF power transistors 2SC2290 or 2SC3240 were damaged. I have not been able to find them, allthough I have searched ansious
Peter, I mentioned this before....but before detuning anything there should be a comprehensive and accurate determination if there is actually any noise contribution from the TX antenna. Some of the
Dennis, I replaced my aging Icom 765 with a 746 pro.....It was a great decision as this rig has a wonderful receiver and other super features, I did after a year loose the backlight but I was able to
Mike, I remember Earl Cunningham, K6SE (SK) did a comparison between the K-2 and the Icom 746PRO and came to the conclusion that the Icom 746 Pro was a much better weak signal performer. At that time
Forget about the cloud warming Inverted "L" hanging of you tall tower as you have plenty of top loading to make the tower with the beams on top to provide an excellent 1/4 plus radiator. A three wire
Gary, The advantage of a three or four wire cage is greater bandwidth, a less reactive feed, and as Goose mentioned the ability to open up the feed point to the bottom of the cage and have it act as
Using the other solid aluminum shield on discarded 3/4 inch CATV cable end runs (called by some 750 or .750) spaced 24 to 36 inches from a towers is a significant improvement over a single #8 wire. Y
Normally the "sweet point" where the connection between the gamma rod and the tower will exhibit 50 ohms plus some inductive reactance makes the gamma rod easier to match, i.e. less components in the
I have always under stood that the "real rf" length depends a lot of the resulting velocity factor, height above ground, and type of soil beneath the run. Is the 500 foot length with 5 feet ABG not c