You are correct Kerry, the supply leads are just that, voltage for the meter
and the instrument. Connecting your dwell meter to a 12V source while
maintaining a common ground with the car should be sufficient. You don't need
a whole lot of current with the meter. I venture no more than 100mA, so you
can use any household DC power supply. Just remember to keep a common ground
with the car since that is a reference point for the measurement. A floating
ground may give you a dwell/RPM reading that is way off.
--- On Thu 12/11, Kerry Pinkerton < pinkertonk@xxxxxxxxx > wrote:
From: Kerry Pinkerton [mailto: pinkertonk@xxxxxxxxx]
To: mailing-list@xxxxxxxxxxxxxxxx
Date: Thu, 11 Dec 2003 07:43:19 -0600
Subject: Re: IML: tach&dwell meter
Can/t you get a 12 V battery and run the hot wire of the meter/tach from
it<br>and just use the coil lead for the trigger? Might have to hook the -
wires<br>of both batteries together. Some of you electrical types jump in on
this.<br>I THINK I remember doing this once but don't remember if I had to tie
the<br>grounds together on the battery or
not.<br><br>Kerryp<br>http://dte.net/57imperial<br>KaP Imperial Services -
Patch Panels, Metalshaping, Restoration<br>Manufacturer of high quality
Wheeling Machines<br>----- Original Message ----- <br>From: "Dick Benjamin"
<dickb@xxxxxxxxx><br>To: <mailing-list@xxxxxxxxxxxxxxxx><br>Sent: Wednesday,
December 10, 2003 10:41 PM<br>Subject: Re: IML: tach&dwell meter<br><br><br>>
If you have one for 12 volts, try it, you might be surprised to find
that<br>it<br>> will work just fine on 6 volts, but if your car is positive
ground,<br>remember<br>> to reverse the clip leads so that the red one is on
the positive (ground)<br>> side and the black one is on the points, and then be
certain not to<br>>
inadvertently let the any metal on the meter touch the car's body. I
have<br>a<br>> plastic cased one which works just fine on either
voltage.<br>><br>> Dick Benjamin<br>> ----- Original Message ----- <br>> From:
<Captden30@xxxxxxx><br>> To: <mailing-list@xxxxxxxxxxxxxxxx><br>> Sent:
Wednesday, December 10, 2003 8:23 PM<br>> Subject: IML: tach&dwell
meter<br>><br>><br>> > does anyone in the club know where i can purchase a
tach&dwell meter<br>that<br>> > will operate off 6 volt. perhaps someone has
one they no longer need and<br>> they<br>> > would like to sell it? i can be
contacted off line at captden30@xxxxxxxx<br>> thanks,<br>> > dennis 53
imperial.<br>> ><br>><br>><br>><br>> -----------------
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