[Top] [All Lists]

Re: [TowerTalk] Measuring beam forward gain.

To: Jim Thomson <>
Subject: Re: [TowerTalk] Measuring beam forward gain.
From: "Richard (Rick) Karlquist" <>
Date: Thu, 31 Dec 2009 07:42:57 -0800
List-post: <">>
> Rick N6RK
>   ##  and what kind of  ant is supposed to be used on the sig gen ??    
>  What if the gain of the signal gen ant is NOT flat across the band ?? 
> I wouldn't   use a vertical or similar.  
> ##  perhaps  one of my local ham friends.. aprx  2 kms  away could
> feed me a constant cxr.   And yes,  I'm  familiar with using hp test
> sets to measure down to .1 db , when  driven by RX audio from the
> xcvr [ in my case, from some rx audio rack gear]   You are correct,
> agc is shut off.. and rf gain reduced, and padding inserted.
> Being able to plot db  vs  0-360 deg on a pc is a new one for me.
> Tnx........... Jim   VE7RF 

I use a 66 foot low dipole, which I believe is adequately broadband for 
the 40 meter band.  Obviously, you don't want to use a vertical because
the polarization would be wrong for a Yagi.  I happen to be on 20
acres, so all this is easy.  Your friend could help, but he needs
to have a dipole on 40 meters, not a Yagi, because of the bandwidth
issue you mentioned.

Rick N6RK

TowerTalk mailing list

<Prev in Thread] Current Thread [Next in Thread>