I've got 2 - 160M "Beverage's" (they're only abt 1/4 wavelength long). In the Dec 160 contest the noise was abt s9 with my inv L and s1 or 2 with the terminated Beverages (NE and West from Southwest
Fritz, for the last year I've been remotely switching my single wire Beverage in uni and bi-directional modes. There are more knowledgable folks on this reflector who can address the technical partic
Hi Fritz, Gain absolutely is meaningless in this application. We can parallel two Beverages a small distance apart, sum the outputs, gain 3 dB, and signal to noise will remain exactly the same! The r
"Recently I was having a discussion with a friend abt adding switches at the terminating resistor in order to switch from uni- to bi-directional. He asked why I just didn't make them bi-directional &
Good point Bill. I didn't catch the 1/4 wave length until after I posted my previous message. Misek predicts very little f/b ratio until a length 1/2 wave (p21, Bev Antenna HB). My discussion assume
This might be a good opportunity for me to give my limited experience with bi vs uni directional short (400 feet) beverage in Stew Perry. I put up a 400' SE beverage just before the test. I had vario
Chuck and all, Very short "Beverages" can work quite well down to 250 or 300 feet, but they almost always require a low termination resistance. A reactive (inductive) termination can improve the f/b
In addition to what Gary said, you can add loading inductors periodically along the antenna. The Zo of the antenna increases (requiring a termination higher than 1000 ohms generally) and the pattern
Very "short beverages" apparently work if one neglects to consider what happens in the vertical plane. A 250-300 (about half wave) feet wire parallel to ground and without termination approach a very
I am faced with less than optimum space for beverages of the right length and the comments of inductive loads to change the pattern of the wire is very interesting for me - and a lot others I guess.
Hi Henrik, Measuring Vp is very difficult. The easiest way to determine the optimum inductance is with a modelling program like Eznec that allows you to insert loads. Otherwise, the process is long.