[SEL] My 2 cents worth

[Paul Russell]

Link to build one and some information if interested.
 
http://www.coolmagnetman.com/magmeter.htm




________________________________
From: Elden DuRand <edurand at mchsi.com>
To: The SEL email discussion list <sel at lists.stationary-engine.com>
Sent: Wed, February 10, 2010 11:42:13 PM
Subject: Re: [SEL] My 2 cents worth

Bill-san:

I haven't used my gaussmeter on but a few magnetos, not enough to get a good idea of the strength range but I may take it to Zolfo and sneak some readings.

The one I built seems to be relatively accurate and easy to use.  I mainly use it around my shop for determining the polarity of the small rare-earth magnets I use for ignition triggers on my home-built engines and others.  

I believe it can be useful to determine the necessity of recharging magnets once a table of the strengths of various magnets is done.  What would be really interesting is to measure a "weak" magnet then recharge it on a high quality charger, one that will maximize the magnetism, then re-measure the magnet to determine the improvement.  After finishing the mag, get a relative reading on the spark strength (and so on).

BTW What are you doing in Thailand?

Take care - Elden
http://www.oldengine.org/members/durand 

> -----Original Message-----
> From: sel-bounces at lists.stationary-engine.com
> [mailto:sel-bounces at lists.stationary-engine.com]On
>  Behalf Of William
> Young
> Sent: Wednesday, February 10, 2010 08:52 AM
> To: The SEL email discussion list
> Subject: Re: [SEL] My 2 cents worth
> 
> 
> TO: Jacob
> From: Bill Young
> RE; Gauss meter & "quantifier"
> Reply to:  jacob warner jacob.warner at pdahome.com>
> Yours of December 3, 2009, 7:49 AM TO, SEL net
> 
> 
> 
> 
> Elden, Have you collected any data on gauss 
> measurements for different types of
> magnetos? Jacob
> 
> Jacob-san, I quite agree with Elden's comments 
> and wish to add a couple of my own.
> (1)  I wanted a gauss meter in the worst way.  I 
> imagined that I had a real need for one because I 
> was doing many EKs for the local lads, I could 
> not find a distributor in Japan.
> (2)  So I built my own gauss "quantifier."
>    (A) On the wall, I fashioned an EK holder.  
>    (B) Just below the EK armature I mounted a 
> hinged lever arm.  But before mounting, I made 
> notches every inch and numbered  them from 1 to 
> 30 beginning at the hinge.
>    (C)  Then I made an "S" hook which    
> would connect  the lever arm to armature.
> (3) The last step was to fashion a one lb. weight 
> which could be moved away from the hinge in one 
> inch increments.  Thus my "quantifier" gave me an 
> idea of comparative magnetism in terms of inch 
> pounds rather than Gauss.
> (4) Years later a Japanese engine lad found a 
> company in Tokyo that sold Gauss meters -- not 
> cheap.  I was so happy with my purchase; I 
> gaussed everything.  It was then that I became 
> disillusioned.  Put the probe on any spot of any 
> magnet; note the reading.  Now, move the probe a 
> quarter inch in any direction.  Guess what?  
> Different reading.
> (5)  My current thinking is that my $2 
> "quantifier" was a more useful tool than the 
> expensive meter.  I was getting an average 
> reading of magnetic strength rather than point to 
> point readings.
>   Elden-san, Did you ever find your Gauss meter a 
> useful instrument?  
>     My greatest satisfaction?  I was the only guy 
> on the block with one. Also in village and city, 
> maybe even in the  county.  Comments please.  Bill 
> 
> ( I am in Thailand now using yahoo address: 
> wmlyoung at yahoo.com  )


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