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[TowerTalk] Preamps for MF and HF

To: towertalk@contesting.com
Subject: [TowerTalk] Preamps for MF and HF
From: "Jim Lux" <jim@luxfamily.com>
Date: Thu, 13 Mar 2025 12:47:23 -0400
List-post: <mailto:towertalk@contesting.com>
        


I've got a DX Engineering AVA-3 preamp here.  It's designed to work with a 
short monopole and supersedes the other preamps that they used to sell (e.g. 
Clifton labs, etc.) for low frequencies.
The input Z is about 1000 ohms with 200 pF in parallel, and I was wondering if 
that's changeable  (higher R, lower C) (perhaps with a change in performance).
The other thing is that it would be nice to have more gain (it has jumpers for 
-6, 0, and +6).

 


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