Thanks Richard,

That's what I needed to know.  The tach works with an input pulse down
to 6 volts, then quits, so I'm going to need a little amplification to
get it to work properly.

Bob W.


On Thu, 2 Oct 2008 19:23:31 -0500
"Richard Sohn" <res12@fairpoint.net> wrote:

> Bob,
>
> the coil trigger signal is supposed to be a square pulse of 5V amplitude and
> 2ms duration. I used this on the single rotor at one time, and it worked
> great.
> FWIW.
>
> Richard Sohn
> N2071U
>
> ----- Original Message -----
> From: "Bob White" <bob@bob-white.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Thursday, October 02, 2008 3:39 PM
> Subject: [FlyRotary] Coil trigger signal
>
>
> > Tracy is on vacation for a while and I need to find out what the coil
> > trigger pulse signal looks like.  Anyone know?
> >
> > This is in reference to recalibrating John Downing's tachometer.  I
> > will publish what I've done as soon as I have it working.
> >
> > Bob W.
> >
> > --
> > N93BD - Rotary Powered BD-4 - http://www.bob-white.com
> > 3.8 Hours Total Time and holding
> > Cables for your rotary installation - http://roblinstores.com/cables/
> >
> > --
> > Homepage:  http://www.flyrotary.com/
> > Archive and UnSub:
> > http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>
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>
>
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--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://roblinstores.com/cables/