Topband: Detuning towers and K9AY loops

Billy Cox aa4nu@ix.netcom.com
Fri, 22 Nov 2002 18:09:32 -0600


>In general you want a modest length of drop wire, something that uses 
>a fairly large capacitor for tuning. The drop wire connects someplace 
>above the point where the system ties to the tower.

<snip>

>You adjust the capacitor's reactance to tune the system. In BC 
>systems we used a small variable L in series with a fixed 
>capacitor...but for amateur use a conventional air variable would 
>work just fine.

ON4UN's book shows using a MFJ-931 "ground tuner" to do the above ...

Anyone used that unit? Results?  (ah ... yet another project ...)

TU!

73 Billy AA4NU