What are the minimum ratings required for a vacuum variable used to shunt feed a tower (used at full legal limit plus some head room)? I would like to shunt feed my 70 foot tower with a 4 el SteppIR
I wouldn't recommend using the SteppIR elements as a capacity hat. The elements are insulated from the boom and most of them won't add a lot a capacity. The driven element has a 2 to 1 balun. It also
I don't agree with "a 2 to 1 balun ... also does a choke function". First of all, the impedance ratio is 9 to 4, and the turns ratio is 3 to 2. Second, all "current baluns" or "common mode chokes" ar
N6RK wrote: "I spent a lot of time analyzing the balun in my MonstIR and characterizing it on a network analyzer." I have always wondered how well that thing worked. They use half of the core for a v
Can you hear the scanner in the background of this video ? http://www.youtube.com/watch?v=k9M-XEqjfbs N9FAA N6RK wrote: "I spent a lot of time analyzing the balun in my MonstIR and characterizi
I didn't measure it as a common mode choke because I thought it was a voltage balun. The fact that the coax is one of the windings does not necessarily indicate that it is a common mode choke. Rick N
The balun is an unusual design. It's a combo 22 to 50 ohm unun plus a common mode choke. Most people say that won't work. However if you look at what they did it almost makes sense. The unun part is
It's that old gag: it depends on what you mean by "works". It will work in terms of operating the SteppIR whether it is a voltage balun or a current balun. So that fact that it works for that purpose