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Name that Voltage Regulator

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Dan Olson

Joined: 31 Jan 2015
Posts: 2

Posted: Sun Feb 01, 2015 3:37 pm Post subject: Name that Voltage Regulator

I got a momentary spike of voltage (needle pegged for about two seconds) the other day while taxing to do my run-up.  I checked my alternator (ALY-8520R) wiring and found that F1 was grounded to the starter, and F2 was connected to the field output of the regulator.  No shorts or opens, but the wiring was in poor shape.  I re-wired the alternator with F1 to field output on VR, and F2 grounded on alternator case (does it even matter which way F1/F2 are wired?).  Wiring on the VR is also in poor shape (cracked insulators).  I will probably replace with the B&C LR3C-14, but it's about four times the size of my current regulator!  In the meantime until I find a place to mount the B&C, I'd like to replace the existing regulator as a quick fix, but can't find a match.  No part numbers or markings other than "12V" and "Nov 1984".  



Anybody see one of these before?   



-Dan

Glasair RG

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nuckolls.bob(at)aeroelect
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Posted: Mon Feb 02, 2015 5:48 am Post subject: Name that Voltage Regulator

At 17:37 2015-02-01, you wrote:

 	  Quote: 	
		  



I got a momentary spike of voltage (needle pegged for about two 

seconds) the other day while taxing to do my run-up.  I checked my 

alternator (ALY-8520R) wiring and found that F1 was grounded to the 

starter, and F2 was connected to the field output of the 

regulator.  No shorts or opens, but the wiring was in poor shape.  I 

re-wired the alternator with F1 to field output on VR, and F2 

grounded on alternator case (does it even matter which way F1/F2 are wired?).


	


   No . . .



 	  Quote: 	
		     Wiring on the VR is also in poor shape (cracked insulators).  I 

 will probably replace with the B&C LR3C-14, but it's about four 

 times the size of my current regulator!  In the meantime until I 

 find a place to mount the B&C, I'd like to replace the existing 

 regulator as a quick fix, but can't find a match.  No part numbers 

 or markings other than "12V" and "Nov 1984".


	


    Go to a car-parts store and get a

    generic replacement for a 1980's

    Ford. If it looks like this



http://tinyurl.com/nfwuxtl



    it will work no matter what brand/

    part number. Should be able to pick one

    up locally for $20 or so . . .



    Tie "A" and "S" leads together and route to

    your alternator switch. Take the F lead

    to the alternator. Ground the case. Leave

    the "I" lead open.



    See



http://tinyurl.com/ku2nb5t



    for exemplar wiring. This will get you by

    until the better alternative becomes

    more attractive.

   Bob . . .

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