Has anyone on the list saved the tach calibration post that I am talking
about?? It was a couple weeks ago??
Kind regards,
Tim Economu
'69 MGBGT Tartan Red (of course the best color!!)
----- Original Message -----
From: "Dan Furbish" <BarnOwl@world.std.com>
To: <economu@whidbey.com>
Sent: Sunday, April 29, 2001 9:22 PM
Subject: Fw: tachometer question, MGB
> Tim,
> thanx for this post it is Very interesting !
> Is there a way to search out archived messages to mgs ?
>
> Dan
> ----- Original Message -----
> From: "Tim Economu"
>
> > Hi George:
> > Have you tested this method? I have done a lot of lamp testing and the
> > filament (if you are talking about incandescent lamps), will glow quite
> > bright even during the zero crossing of the 60 Hz. So doubt if you will
> see
> > a "strobe" effect at all. Also remember the lamp filament is actually
> > turning on at 120hz, since it will pass current during both peak phases
of
> > the 60Hz (or 50 in Europe and Australia), so if you were to choose a
> > multiple, such as 5 X 60 = 300 RPM, it would not be as distinctive as
say
> 3
> > X 120 = 360 RPM. And of course you would not really know what RPM the
> engine
> > was "actually" turning, without a reference.
> >
> > Wasn't there just a long post by some chap who took the time to do a
very
> > detailed write-up of his MG electric speedo calibration? His was, by my
> > humble reckoning, the best method I have seen while subscribing to the
> list
> > these past two years. The test equipment he used was readily available
> from
> > any friend who does electronic repair.
> >
> >
> > Kind regards,
> >
> > Tim Economu
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