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Re: [Amps] Alpha 91b

To: "gm5bkc@gmail.com" <gm5bkc@gmail.com>
Subject: Re: [Amps] Alpha 91b
From: CHRIS QUARTON <chris@g5kc.com>
Date: Tue, 10 Mar 2026 09:56:35 +0000
List-post: <mailto:amps@contesting.com>
Hi Glenn,

Thank for your e-mails and information, it’s most appreciated.

Really appreciate the prompt replies

73
Chris - G5KC / VP8KCA


Kind Regards
Chris Quarton
Security Specialist
M: +44 7584 566 996
E:  chris@g5kc.com



On 10 Mar 2026, at 01:13, Glenn AE0Q <gm5bkc@gmail.com> wrote:

Yes, follow mounting instructions on the 91B web page.  You will need a new
plastic fan that presses on the straight shaft of the new motor, I would
recommend getting one from Dick Byrd N4UQ, he has some.

https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.n4uq.com%2F&data=05%7C02%7C%7C3a82d6b8b5404b51ffca08de7e424562%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C639087020244420332%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=qTbTl3p%2FsS49uQKbZt%2F9merShnhloLREBB8R0VJJLXo%3D&reserved=0

Glenn AE0Q

On Mon, Mar 9, 2026 at 7:00 PM Fern Rivard <crc@cyberlink.ca> wrote:

*Hi Glen. Is this also a good replacement to use in the alpha 86?*

*73 from Fern VE7GZ*
On 09/03/2026 6:46 p.m., Glenn AE0Q wrote:

Hello Chris,

Use this Dayton motor:
https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.grainger.com%2Fproduct%2FDAYTON-C-Frame-Motor-1-150-4M078%3FsearchQuery%3D4m078%26searchBar%3Dtrue%26tier%3DNot%2BApplicable&data=05%7C02%7C%7C3a82d6b8b5404b51ffca08de7e424562%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C639087020244443861%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=wZVqcUbveaKTiTp0sqNZAT07hWTyKGZn3jTcscHHYJg%3D&reserved=0

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://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.alpharfsystems.com%2F%3Fp%3D1417&data=05%7C02%7C%7C3a82d6b8b5404b51ffca08de7e424562%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C639087020244465536%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=b0kT3yt07lOGvlzVGtx%2FXdPVoHwxDMOYQN6j98I6ah4%3D&reserved=0

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