Topband: Re: Topband digest, Vol 1 #462 - 4 msgs

[Telegrapher9@aol.com]

I like to think of the Beverage antenna as nothing more than a directional 
coupler. I'll run some simulations with nearby Beverages open and then 
terminated to see what is best. I bet it's best to terminate the unused 
Beverages. Otherwise, there will be some backward crosstalk from the 
unterminated Beverage to the nearby Beverage as the signal reflects off of 
the unterminated end and travels to the terminated end. 

It seems a direction-reversing Beverage can be built using a length of coax 
for the Beverage wire. For the "normal" direction use the shield as the 
Beverage and feed as usual.  For the "reverse" direction, use the shield as 
the antenna and feed the signal, from the far end, back through the coax, 
taking care to match, terminate, and ground as required. Double shielded coax 
would be the thing to use to reduce leakage from the reverse direction signal 
getting into the coax.

   Dave WX7G


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