James...the round 'bullet' is the 'signal' terminal from
the (-) side of the coil. The flat spade is the V+ terminal.
Just 'switiching' V+ will not activate the integrated ckt.
on the board inside the tach. You need full power to V+
and ground with a separate 'signal' input to trigger the
ckt. that drives the meter.
Paul Tegler
ptegler@cablespeed.com
www.teglerizer.com
----- Original Message -----
From: "James Carruthers" <j.carruthers@rave.ac.uk>
To: "'SpitfireMailList'" <spitfires@autox.team.net>
Sent: Saturday, May 01, 2004 4:20 PM
Subject: 1500 Tacho Terminal
> Can anyone advise me to which terminal is the positive and which is
> negative?
>
> There are 3 terminals - a bullet style one - a flat one - and another
> flat one which is obviously ground.
>
> My current plan was to just take a lead from the + and - terminal from
> the coil and attach it to the tacho...
>
>
>
> James
>
> 69 Signal Red Spit
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