Topband: 2 wire beverage question

Tom W8JI w8ji at w8ji.com
Wed Nov 28 12:40:57 EST 2012


> ** Ive noticed no difference in any weather using field phone wire which 
> happens to be in wide use by many very competitive contesters and lowband 
> DXers. With 5 2 wire reversibles here and 750' of 1/2" feedline there is 
> no need for a preamp.

I'm talking about:

1.) impedance change

2.) reactance caused by loss

Since the impedance presented at the far end of the antenna (in termination 
mode) varies with weather and is reactive (with high and variable dielectric 
losses), termination can be unreliable.

Maybe that's why you think I have a remote receiver :-) ?

> The galvanized thin fence wire you often champion is also lossy.

That's an apples and oranges comparison.

First, I don't "champion" galvanized wire. That aside, there is nothing 
wrong with using it in normal Beverages of reasonable length. It is not 
terminating the system for F/B, and the termination impedance and loss does 
not vary with weather.






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