Topband: bidirectional beverage VS not terminating beverage

N1BUG paul at n1bug.com
Wed Jan 27 04:15:33 PST 2010


> will the performance of a beverage go down if I quit the resistor and ground
> at the end? I know that it will became bidirectional, but this is not a
> problem for me, much better if I can heard in both directions.

Hi Jorge,

I can comment on this from personal experience. My first Beverage farm 
consisted of several unterminated, bidirectional Beverages. I could hear 
better with them than I could with the vertical or dipole, but too often 
I would get unwanted QRN from storms off the "back" end. For example 
when I was trying to receive DX from the northeast, I would often have 
strong QEN coming from the southwest.

Later I replaced all the Beverages with unidirectional (reversible) ones 
of the same length. The performance is much better !!! They are much 
quieter.

Being able to listen in just one direction is what you want if you have 
any possibility to do it.

73,
Paul N1BUG


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