>I would like to know how you can get 15893pf from a 1000pf capacitor. That >has to be a mis-read value there...gary maybe rounded off to 159pf??
That's a great question. Where is the analyzer actually getting that reading? 73, Larry K4AB On 12/10/14, Tom W8JI <w...@w8ji.com> wrote: >> I'm concerned about a few things: >> >> 1) I'm thinking the antenna is electrically too short. After all, the >> Yagi at the top really isn't adding too much top loading. And I'm >> thinking >> adding a couple of top loading wires connected to the tower >> might be beneficial. > > If you run any power, you will likely start to have problems with arcing at > > the Yagi antenna elements where they cross the boom. > > This is because of the poor insulation, and because of the high voltage at > the boom when on 160. > > The cure for that is to ground the elements to the boom though air coil > inductors. Just five or ten uH would work OK, and not upset the antenna > operation. This would also add 160 top loading. > > >> 2) What exactly is the analyzer telling me when it says C:15893pF? >> I'm far from an engineer, but something tells me that's way high. Or is >> it? > > It is meaningless. It just means you are measuring almost where the antenna > > is resonant. > > 73 Tom > > _________________ Topband Reflector Archives - http://www.contesting.com/_topband