[Farmall] Tachometer

[Robert L. Holtzer]

I recall the reed types from my model airplane days.  Are they still being 
made?

Bob Holtzer

At 04:31 PM 12/20/2004 -0600, you wrote:
>Hi,
>
>I have used them all. I like reed tachs. They are simple, reliable and work
>every time as long as you do not need to know the RPM to the last digit.
>There is two types...in the can types and variable stick slide types. I use
>the stick slide types because I can read from 10 RPM to 10,000 RPM on a
>gauge set that would fit in my shit pocket. About 30 bucks total.
>
>The strobe types are cool as long as you can mark the item. So is infrared.
>They are no touch and do not need any markers. Expensive...$200 used/
>
>Something to consider.
>
>Jim Rohr
>
>-----Original Message-----
>From: farmall-bounces at lists.antique-tractor.com
>[mailto:farmall-bounces at lists.antique-tractor.com] On Behalf Of E. John
>Puckett
>Sent: Monday, December 20, 2004 12:38 PM
>To: Farmall/IHC mailing list
>Subject: Re: [Farmall] Tachometer
>
>I don't think I made my self clear.  I didn't mean total number of times it
>saw the blades pass, rather the frequency of the passage.  If it did that
>when using a 3 bladed prop you would have to divide the readout by 3.
>
>soffiler at myeastern.com wrote:
>
> > I don't know but strongly suspect it reads RPM directly.  If it just
> > counted the number of times the prop blade passed, you'd see nothing
> > but an ever-increasing number on the readout as it passed by over and
> > over and over.  That would be useless, unless you also had a stopwatch
> > and froze the count reading at some particular point, then did the
> > math.
> > I can't believe anyone would find something like that even remotely
> > useful.  Therefore my hunch it reads RPM directly.
> >
> > Steve O.
> >
> >
> > From: "E. John Puckett" <ejpuckett at centurytel.net>
> > To: Farmall/IHC mailing list
> > <farmall at lists.antique-tractor.com>
> > Subject: Re: [Farmall] Tachometer
> > Date: Mon, 20 Dec 2004 07:47:16 -0600
> >
> > ----- Original Message Follows -----
> >
> >>I've been looking for something similar, but everything I've found ran
> >>in the  $75 to $150 range.  Does it give a reading of the number of
> >>times the prop blade  passes, or is their a scale that changes the
> >>counts to rpm.  might have to do a  little calculation to get rpm from
> >>a tractor engine.
> >>
> >>Robert L. Holtzer wrote:
> >>
> >>> From time to time there has been discussion of setting engine idle,
> >>>etc.  Recently in a model airplane shop I saw a $25 tachometer that
> >>>had  an RPM range of 0 to 30,000.  It detected RPM from the propeller
> >>>--
> >>
> >>apparently something akin to a strobe.  It would probably
> >>
> >>>work off a  painted mark on a crank pulley.
> >>>
> >>>Anyone have any experience with this type of equipment?
> >>>
> >>>Bob Holtzer
> >
> > _______________________________________________
> > Farmall mailing list
> > http://www.antique-tractor.com/mailman/listinfo/farmall
> >
> >
>
>--
>John
>another one of them
>*.?-!.* cub owners
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