[TowerTalk] How Important is F/B?

Bill Turner wrt@eskimo.com
Fri, 27 Jun 1997 02:43:29 GMT

On Thu, 26 Jun 1997 09:06:48 -0400 (EDT), Bill Fisher - W4AN
<w4an@contesting.com> wrote:

>On Thu, 26 Jun 1997, T. A. Russell wrote:
>> In my opinion,  Front-to-Back ratio is an overrated characteristic.
>I can't disagree more.  I optimized my 5 element 20M yagi for F/B and 
>SWR.  The difference between it and a 204BA stack on TX is nil.  On RX, 
>the difference is night and day.  I can turn an unusuable frequency in to 
>a runnable frequency with this antenna as compared to the stack of 
>204BA's.  What did I lose by optimizing for F/B and bandwidth?  A few 
>10ths of a DB in gain.  So what?  You cant hear a few 10ths of a DB. 
I question whether you have a "runnable" frequency by simply nulling
out someone on the backside.  YOU may no longer hear them, but the
folks you're trying to talk to still hear them (and you) just fine.
To make matters worse, now neither you nor he knows you're QRMing each
other.  All either of you knows is no one is coming back to you.
Better to find a REALLY clear frequency, front AND back.

73, Bill W7TI

FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com
Search:			  http://www.contesting.com/km9p/search.htm