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[Amps] Alpha 91b

To: Amps@contesting.com
Subject: [Amps] Alpha 91b
From: Glenn AE0Q <gm5bkc@gmail.com>
Reply-to: gm5bkc@gmail.com
Date: Mon, 9 Mar 2026 18:46:11 -0600
List-post: <mailto:amps@contesting.com>
Hello Chris,

Use this Dayton motor:

https://www.grainger.com/product/DAYTON-C-Frame-Motor-1-150-4M078?searchQuery=4m078&searchBar=true&tier=Not+Applicable

Depending on the shaft and wheel of the blower now in the amp, you may need
a new fan wheel.  See lots of info on the Alpha Amplifier 91B web page:

https://www.alpharfsystems.com/?p=1417

Glenn AE0Q
(answering remotely from home in Colorado)
Alpha RF Systems, LLC
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