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Re: [Amps] SPE 2K RTTY Duty Cycle

To: "Kevin Stover" <kevin.stover@mediacombb.net>, <amps@contesting.com>
Subject: Re: [Amps] SPE 2K RTTY Duty Cycle
From: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 22 May 2015 09:06:40 -0400
List-post: <amps@contesting.com">mailto:amps@contesting.com>
There are NO 12V final amateur transceivers that make -40dB IM3, none. Never have been, never will be. The best are at -33 to -35.

As I recall, the ANAN series transceivers use a +12V PA stage. With adaptive predistortion engaged, they achieve IMD improvement a good 20 dB better than these numbers.

So, it's not entirely accurate to state that there isn’t a single "+12V final" transceiver that achieves these high IMD numbers.

Paul, W9AC
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