Thanks for all the immediate emails received....very quick response and valuable information. I sent for a couple of the potentiometer (though not exactly the same as inside the rotator) but compatible ones.
https://www.ebay.com/itm/RA25Y20S-B502-Original-New-Cosmos-Potentiometer/123...
I am to receive them next week.
73
________________________________________ De: Mike Wilhelm af5at.radio@gmail.com Enviado: viernes, 1 de mayo de 2020 03:48 p. m. Para: Joseph B. Fitzgerald CC: amsat-bb@amsat.org; Rafael Pena Asunto: Re: [amsat-bb] G-5500 AZ Potentiometer
I found a US data sheet from the American Division of the company. Contact information is at the bottom of the US office of Tocos, but here it is too:
1177 East Tower Road, Schaumburg, IL 60173 Tel: 847-884-6664 Fax: 847-884-6665 E-mail: sales@tocos.commailto:sales@tocos.com www.tocos.comhttp://www.tocos.com
-Good Luck! Mike AF5AT
On Fri, May 1, 2020 at 2:36 PM Joseph B. Fitzgerald via AMSAT-BB <amsat-bb@amsat.orgmailto:amsat-bb@amsat.org> wrote: 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....
de KM1P
________________________________________ From: AMSAT-BB <amsat-bb-bounces@amsat.orgmailto:amsat-bb-bounces@amsat.org> on behalf of Rafael Pena via AMSAT-BB <amsat-bb@amsat.orgmailto:amsat-bb@amsat.org> Sent: Friday, May 1, 2020 2:43 PM To: amsat-bb@amsat.orgmailto:amsat-bb@amsat.org Subject: [amsat-bb] G-5500 AZ Potentiometer
Hello everyone.
I am looking for a compatible, if not the same, potentiometer for Yaesu G-5500. The AZ is starting to do its dance queen. Flickers between 180-270 and stabilizes after matching SatPC32 target. But swings left at that area then settles. I have already place some de-oxit on top of it (or better say, bottom). It helped somewhat but I see the need for replacing it at some point soon.
I placed a call to Yaesu Tech support and I am waiting on them to call me back. The person answering the live line though first told me that the part is not available. So I requested tech support. This system is still being sold new all over the place and the pot must be available. This same pot seems to be used in other similar Yaesu rotators, i.e., 5400.
The pot has a number written RA25Y20S B501 083 321 which matches the number I saw someone who posted a Yaesu receipt of service performed. Yaesu part number is S8101823
I have seen some on the #Bay that were listed by purchasers as compatible. I missed the chance to buy the last two:
https://www.ebay.com/itm/1pcs-COSMOS-RA25Y20S-B501-500-OHM-1-2W-Wirewound-Po...
Any help is appreciated. _______________________________________________ Sent via AMSAT-BB@amsat.orgmailto:AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.orgmailto:AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb