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Key West Voltage Regulator

 
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Tom Jones



Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
PostPosted: Thu Aug 05, 2010 3:12 pm    Post subject: Key West Voltage Regulator Reply with quote
This is on a 503 rotax.
My Tympanium voltage regulator went bad so I replaced it with a Key West regulator. I had the 12VDC output wire from the old tympanium regulator connected to the starter side of the master contactor so This is where I connected the Key West 12V DC output wire. My Hobbs meter is also connected to the same terminal on the starter side of the master contactor.

I noticed my Hobbs kept running when the master is off. I disconnected all the wires on the Key west and checked for voltage. There is 4.3 volts DC between the key west ground terminal and 12V DC output terminal. Is it normal to have some residual voltage in the Key west?

I guess I need to move the output wire from the key west regulator to the battery + terminal so that 4.3 volts doesn't touch the hobbs wire?? Am I on the right track?

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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
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PostPosted: Thu Aug 05, 2010 8:20 pm    Post subject: Key West Voltage Regulator Reply with quote
mine did samething simular but the hobs just ran down to stop maybe 8 seconds it seems yours sounds like it is dooing something different

Malcolm Brubaker
Michigan Sport
Pilot Repair
LSRM-A, PPC, WS
(989)513-3022


From: Tom Jones <nahsikhs(at)elltel.net>
To: kitfox-list(at)matronics.com
Sent: Thu, August 5, 2010 7:12:20 PM
Subject: Key West Voltage Regulator

--> Kitfox-List message posted by: "Tom Jones" <nahsikhs(at)elltel.net (nahsikhs(at)elltel.net)>

This is on a 503 rotax.
My Tympanium voltage regulator went bad so I replaced it with a Key West regulator. I had the 12VDC output wire from the old tympanium regulator connected to the starter side of the master contactor so This is where I connected the Key West 12V DC output wire. My Hobbs meter is also connected to the same terminal on the starter side of the master contactor.

I noticed my Hobbs kept running when the master is off. I disconnected all the wires on the Key west and checked for voltage. There is 4.3 volts DC between the key west ground terminal and 12V DC output terminal. Is it normal to have some residual voltage in the Key west?

I guess I need to move the output wire from the key west regulator to the battery + terminal so that 4.3 volts doesn't touch the hobbs wire?? Am I on the right track?

--------
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA


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Tom Jones



Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
PostPosted: Fri Aug 06, 2010 6:18 am    Post subject: Re: Key West Voltage Regulator Reply with quote
Thanks Malcolm, After reading your post this AM I went out and hooked everything back up and turned the master switch on for a minute and then off. My multimeter showed 4.3 volts on the Key west out put terminal and the Hobbs continued to run for 60 seconds then stopped. I then checked the out put terminal and it was down to 2.5 volts and dropping.

I think I will leave it wired as is. I like the voltage regulator to be off line with the master off. I don't know why, it just seems like a good thing to me.

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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
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