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Date:         Sat, 28 May 2011 21:51:36 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Anything like this for 1.9L?
Comments: To: camping.elliott@gmail.com
In-Reply-To:  <1306632752.31810.56.camel@TheJackUbuntuNetbook>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 09:32 PM 5/28/2011, Rocket J Squirrel wrote:
>Yeah but what does it use for a frequency reference?


Never taken one apart to see.  Could be a self-contained crystal
oscillator with a frequency divider or a multivibrator  or an r-c
oscillator with a ceramic resonator and freq. divider.  I'd give some
odds it's a 555 timer though, it's low frequency and not
critical.  OTOH they use a 4 MHz crystal in the dash clock instead of
32768 Hz (which is why it's accurate to better than five seconds a
month); so maybe they got anal with the idle stab as well.


Yrs,
d
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