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[Amps] 400 watt Polyfet HF amplifier

To: "amps@contesting.com" <amps@contesting.com>
Subject: [Amps] 400 watt Polyfet HF amplifier
From: John Lyles <jtml@losalamos.com>
Reply-to: jtml@vla.com
Date: Thu, 18 Jan 2018 00:38:00 -0700
List-post: <mailto:amps@contesting.com>
Polyfet has a 2014 technical bulletin on their website, TB239. It uses their LY942 LDMOS transistor to make a flat 2-30 MHz 400 watt linear amplifier with 20 dB gain, using 50 volt parts. Its a compact layout and there is a full parts list along with plots. Has anyone built one of these? Its not 1200 or 1800 watts, but has decent 3rd order IMD results listed.
73
John
K5PRO
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