[TowerTalk] Beverage Intermod

Tom McAlee tom at klient.com
Tue Aug 8 17:10:51 EDT 2006

It seems you know the best solution... move the Beverage!  But, have you 
tried locating the preamp after the rx bandpass instead of before it?  I 
found that it didn't remove all of the junk, but it sure did help.

Tom, NI1N

----- Original Message ----- 
From: "Robert Pack (NX5M)" <nx5m at txcyber.com>
To: "towertalk" <towertalk at contesting.com>
Sent: Tuesday, August 08, 2006 4:56 PM
Subject: [TowerTalk] Beverage Intermod

>A recently installed 40m stack is 100 feet away from my main (best) EU 
>beverage.  Since this install, the qrm on the beverage is bad enough that I 
>cannot listen on 160.
> I have also had issues with being able to hear when someone is 
> transmitting on 80 as one of the 80m antennas is about the same distance 
> away as the 40m stack.
> I built bandpass filters for the 80 and 160 rx systems but this just does 
> not seem to be enough.
> All other beverages are relatively unaffected.
> Other than tearing down the beverage and relocating it 600 feet away, 
> which means clearing quite a bit of thick underbrush, any of you have any 
> ideas how to clean this mess up?
> Bob NX5M

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