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Re: Cory's mysterious relay

To: coryc@sequent.com
Subject: Re: Cory's mysterious relay
From: pwv@tc.fluke.COM (Pat Vilbrandt)
Date: Mon, 10 Aug 92 13:52:29 PDT
>From Cory Carpenter <coryc@sequent.com>:

> I'm now considering trying a solid-state system, in the form of a very
> common Ford regulator that a parts-counter guy showed me:  it has
> terminals for Alt, Bat, Ign, and Gnd, if I'm remembering correctly, and
> may replace both the relay and the mechanical regulator.  

The first thing you will need to do will be to determine if this regulator is
compatable with your alternator.  There are two basic types of alternator - 
one has the field connected to the battery + through one brush and the other 
side grounded through the regulator.  The other type has one brush directly 
grounded and the other connected to the regulator.  Note also that the 
charge "idiot light" is controlled by the regulator, so there should be
a connection for this also.

> My only concerns about it are that the Ign connection does the same thing 
> as the relay (keeps the circuit between the regulator and the battery closed
> while the ignition is on), 

Probably so.

> and that the regulator section itself is sized correctly for a 30-Amp 
> alternator.  

30 amps is actually pretty small for an alternator - any compatable regulator
should be able to handle it.  (Hmmmm, was that an obvious statement, or what?)

   Pat Vilbrandt       John Fluke Mfg. Co., Inc.        Everett, Washington USA
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