Re: [Elecraft] 80 Metre Verticals

2017-02-28 Thread Jim Brown
Hi Chuck, In general, with lousy ground, horizontally polarized antennas RULE! The earth interacts with verticals in two ways. First, the soil under the vertical is a big resistor, burning TX power. Second, where the first reflection hits the earth (in the far field) reinforces the direct

Re: [Elecraft] 80 Metre Verticals

2017-02-28 Thread Chuck Chandler
So... if I am planning to move to the high desert of New Mexico in a few years, what is the best low-band antenna option? I've used verticals over lots of radials in Massachusetts and Mississippi with good success, but if I'm up 6500 feet and the water table is WAY down there... what, a dipole?

Re: [Elecraft] 80 Metre Verticals

2017-02-28 Thread Guy Olinger K2AV
Concurring with Tom, assuming you have the polarity of the X correct, and there's more. A short 1/4 wave-ish vertical that shows R=57 in the R+jX expression is a vertical/counterpoise or radial(s) combo that has far too much resistance and is a dead giveaway for a considerably inefficient antenna

[Elecraft] 80 Metre Verticals

2017-02-28 Thread Tom Boucher
Fred, If your inverted 'L' was a bit less than a quarter wave long, it would have been capacitive and showing 57-j130 (not plus). In which case you needed a small inductor to match it to your 50 ohm coax, not a capacitor. 73, Tom G3OLB