[amsat-bb] G-5500 AZ Potentiometer

[Russ Kinner]

Your issues remind me of a similar problem I had early in my career with feedback wire resistors in control valves.  Same extreme conditions and quite valuable production loss of it fails.  Eventually the feedback sensor was changed to a LVDT electronic sensor with magnetic position.  It does cost more but you never have to touch it.

Rusty. WA8ZID


From: "Joseph B. Fitzgerald" <jfitzgerald at alum.wpi.edu>
To: "amsat-bb at amsat.org" <amsat-bb at amsat.org>, Rafael Pena
<pinoleronica at hotmail.com>
Subject: Re: [amsat-bb] G-5500 AZ Potentiometer
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<BLAPR22MB21154EF2DF94D500F9FD719187AB0 at BLAPR22MB2115.namprd22.prod.outlook.com>

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I didn't find a supplier, but I did find a datasheet. You can probably find a replacement from a different manufacturer.


Curiously it is only rated to -10C.

https://www.tocos-j.co.jp/tocos-j-wp/wp-content/uploads/2019/06/RA25_Series.pdf