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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