Please see the referenced link below for more details on recalibrating your
tach. The part number for the .22MFD (C2) is 272-1070 and the 100MFD (C3) is
272-1016. Sorry, but I lost the part number to the 6V zener diode. As I
remember, it wasn't exactly 6V....but it was something like 6.1V or 5.9V but
these are close enough. You'll have to recalibrtae the tach anyway after you
change the parts. I also found some Germanium transistors (NTE158) that may
or may not help fix your problem. According to the tech tip by Mark Olsen,
these are supposed to be the best replacements for the original transistors.
I have a few extras but they're not cheap at $2.00 ea. Let me know if you
want to buy a couple.
Here is a link to the tech tech by Mark Olsen:
http://www.corpdemo.com/tiger/techtips/motach.html
----- Original Message -----
From: "Andrew Gregg" <viber@onix.net>
To: "Sergio Dimarmo" <iwander@att.net>
Sent: Monday, June 26, 2000 6:18 PM
Subject: Re: Tach problem
> It would be very, very helpful if you could find those numbers. Thanks
much!
> - Andrew Gregg
> viber@onix.net
> 631-765-3996
> Series IV
>
> ----- Original Message -----
> From: "Sergio Dimarmo" <iwander@att.net>
> To: "Alpines Mailing List" <alpines@autox.team.net>
> Sent: Monday, June 26, 2000 9:07 PM
> Subject: Re: Tach problem
>
>
> > I recently rebuilt some old tachs I had and replaced a few of these
> > components. I bought some of the parts at a local Radio Shack and could
> look
> > up the catalog numbers if you want.
> >
> > ----- Original Message -----
> > From: "Andrew Gregg" <viber@onix.net>
> > To: "Alpines" <alpines@autox.team.net>
> > Sent: Monday, June 26, 2000 5:05 PM
> > Subject: Re: Tach problem
> >
> >
> > > Patrick,
> > > That's the problem I'm trying to fix with my tach. As it warms up, it
> > seems
> > > to read double (or more) the actual rpm. I read a past posting to the
> list
> > > that detailed how to open the tach and check everything out.
Evidently,
> > the
> > > black capacitors usually come apart, and there is a round resistor
that
> > may
> > > be cracked. There is also a POT resistor that you can adjust for some
> > > accuracy. The tach's are notoriously inaccurate, so don't expect too
> much.
> > > This is what I was told, hope it helps.
> > > - Andrew Gregg
> > > viber@onix.net
> > > 1964 Series IV
> > >
> > > PS - If you can make out the specs on your black capacitor, please let
> me
> > > know. Thanks.
> > >
> > > ----- Original Message -----
> > > From: "Patrick" <pLaske@bigfoot.com>
> > > To: "Sunbeam Alpines" <alpines@autox.team.net>
> > > Sent: Monday, June 26, 2000 7:26 PM
> > > Subject: Tach problem
> > >
> > >
> > > > My tach on a Series V seems to run really high. I haven't put
another
> > > tach
> > > > on the motor yet but my tach shows about 3200 rpm and I'm sure it's
> > idling
> > > a
> > > > lot lower than that... although the idle is high. Would this be
> related
> > > to
> > > > the capacitor problem that someone mentioned earlier or would
> something
> > > else
> > > > be causing this?
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
>
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