Peter,
Normally I would consider it blasphemy to even THINK about correcting
the esteemed
Mr. Masters, however in this case I have to beg leniency as I have wired the
tach slightly differently than the "in series" version. I took a lead off one
of the spare male spades on the negative side of the coil for the sender to the
electric tach. This only sends a pulse when the motor is turning over, ie when
cranking or running. Quite possibly I missed the early part of the thread
here, as it seems almost an obvious method, so obvious I don't see how my
electrical mentor missed it. Keep me posted.
Chris Prugh
72 Spitfar
Morgan Hill, CA
----------
From: DANMAS@aol.com[SMTP:DANMAS@aol.com]
Sent: Sunday, November 02, 1997 7:16 AM
To: pllj@earthlink.net
Cc: triumphs@autox.team.net
Subject: Re: Electronic Tach
In a message dated 97-11-02 13:14:55 EST, pllj@earthlink.net writes:
> If I were to use one of the "series tachs" do you know of a way, if even
> necessary, of not using the connection to the key switch. It sounds
> like, from what you've written, that if using the above mentioned tach-
> it would need to be wired as in the original application. (Just trying
> to get away with one less wire and keep the key switch out of it)
Peter:
Unfortunately, there is no other way to wire it. Power to the coil MUST pass
THROUGH the tachometer for the tach to register. You don't have to connect it
directly to the key switch, but where ever you connect it, the power has to
be switched off when the key is off. Otherwise, you can't shut the engine
off.
Dan Masters,
Alcoa, TN
'71 TR6---------3000mile/year driver, fully restored
'71 TR6---------undergoing full restoration and Ford 5.0 V8 insertion - see:
http://www.sky.net/~boballen/mg/Masters/
'74 MGBGT---3000mile/year driver, original condition
'68 MGBGT---organ donor for the '74
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