May 2020 - AMSAT-BB - mailman.amsat.org

Re: [amsat-bb] po-101 sub tone
by on4cjq＠telenet.be 02 May '20

02 May '20

Jack, 3F is the code for a 67Hz tone, so for 141.3 it should be different. Even without a subtone the sat can be accessed. Probably you are just using a 67Hz subtone because that also works. Jerry,ON4CJQ ----- Oorspronkelijk bericht ----- Van: "amsat-bb" <amsat-bb(a)amsat.org> Aan: "amsat-bb" <amsat-bb(a)amsat.org> Verzonden: Vrijdag 1 mei 2020 21:13:02 Onderwerp: [amsat-bb] po-101 sub tone Tom: The sub tone is as follows PO-101,141.3,$3F,1 Hope that helps 73 JACK KC7MG _______________________________________________ Sent via AMSAT-BB(a)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

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Re: [amsat-bb] G-5500 AZ Potentiometer
by Rafael Pena 02 May '20

02 May '20

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/12… I am to receive them next week. 73 ________________________________________ De: Mike Wilhelm <af5at.radio(a)gmail.com> Enviado: viernes, 1 de mayo de 2020 03:48 p. m. Para: Joseph B. Fitzgerald CC: amsat-bb(a)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(a)tocos.com<mailto:[email protected]> www.tocos.com<http://www.tocos.com> -Good Luck! Mike AF5AT On Fri, May 1, 2020 at 2:36 PM Joseph B. Fitzgerald via AMSAT-BB <amsat-bb(a)amsat.org<mailto:[email protected]>> 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(a)amsat.org<mailto:[email protected]>> on behalf of Rafael Pena via AMSAT-BB <amsat-bb(a)amsat.org<mailto:[email protected]>> Sent: Friday, May 1, 2020 2:43 PM To: amsat-bb(a)amsat.org<mailto:[email protected]> 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-P… Any help is appreciated. _______________________________________________ Sent via AMSAT-BB(a)amsat.org<mailto:[email protected]>. 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(a)amsat.org<mailto:[email protected]>. 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

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Re: [amsat-bb] G-5500 AZ Potentiometer
by Russ Kinner 01 May '20

01 May '20

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(a)alum.wpi.edu> To: "amsat-bb(a)amsat.org" <amsat-bb(a)amsat.org>, Rafael Pena <pinoleronica(a)hotmail.com> Subject: Re: [amsat-bb] G-5500 AZ Potentiometer Message-ID: <BLAPR22MB21154EF2DF94D500F9FD719187AB0(a)BLAPR22MB2115.namprd22.prod.outlook.com> Content-Type: text/plain; charset="us-ascii" 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…

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Subtones.sqf file
by alex weimer 01 May '20

01 May '20

Tom: If you go into satpc32 and click on the subtones.sqf file and scroll down through the notepad. you will see that the $3F is used for the FT847. So therefore PO-101,141.3,$3F,1 is the correct format .. I have the FT847 and this format works !! 73 JACK KC7MG

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YouTube Video :: replay of RS44 linear transponder pass on May 1st
by Scott 01 May '20

01 May '20

Greetings! If anyone would like to see the come & go fade being discussed on RS44, or perhaps has not had a chance yet to see activity on this surprise new satellite, here is a replay of this morning's pass over the Eastern U.S.: https://youtu.be/iK8RbBd5K-k ... I know it's frustrating to watch someone else tune a receiver - sorry! But I thought it might be interesting to share for anyone not setup for linear sats or who just hasn't had a chance to see the activity on this new satellite. -Scott, K4KDR

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repair of G5400 el rotor
by Jim White 01 May '20

01 May '20

I have a G5400 elevation rotor that needs repair. It only moves 90 degrees and the pot, when hooked to a working control box, shows 90 to 180 degrees of travel. I just don't have time to work on it myself. I'd appreciate pointers to anyone who repairs these. Jim, WD0E

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SubTone.SQF for PO-101
by tjschuessler＠verizon.net 01 May '20

01 May '20

I have an FT847 and want to update the SubTone.SQF file for the PO-101's 141.3 tone. What is the appropriate HEX $ value for that line in the file please. Thanks Tom Schuessler, N5HYP EM12ms

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G-5500 AZ Potentiometer
by Rafael Pena 01 May '20

01 May '20

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-P… Any help is appreciated.

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po-101 sub tone
by alex weimer 01 May '20

01 May '20

Tom: The sub tone is as follows PO-101,141.3,$3F,1 Hope that helps 73 JACK KC7MG

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Sub Tone for P-101 Sat
by alex weimer 01 May '20

01 May '20

Tone is 141.3 Hz

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