[SEL] My 2 cents worth

[Elden DuRand]

Ed:

Do you have a source for calibrated Hall sensors?  I think my supplier, Sprague, is out of the business.  I'd like to have a source to post on my site.

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 Ed Stoller
> Sent: Friday, February 19, 2010 04:23 PM
> To: The SEL email discussion list
> Subject: Re: [SEL] My 2 cents worth
> 
> 
> I am a little late here, just back from a trip.
> 
> The kits ( about 15 of them) I distributed look 
> like those in the earlier 
> link, http://www.coolmagnetman.com/magmeter.htm , 
> but made with a PC board. 
> I do have a bag of some less sensitive sensors as 
> I found the ones we used 
> too sensitive. The most recent use of mine was 
> for mapping the ignition 
> trigger magnets on an Onan engine.
> 
> The original idea of measuring magneto magnets 
> was a bust as those charging 
> the magnets would stick them to an iron beam, 
> pull them off and know if the 
> magnet was charged or not. I think we might look 
> at the idea of measuring 
> the magnetism of the magnets when still installed 
> in a magneto so we would 
> not have to disturb the magnets that were good.
> 
> Ed Stoller
> New Fairfield, CT
> http://home.earthlink.net/~edstoller/
> 
> 
> ----- Original Message ----- 
> From: "William Young" <wmlyoung at yahoo.com>
> To: "The SEL email discussion list" 
> <sel at lists.stationary-engine.com>
> Sent: Wednesday, February 10, 2010 9:51 AM
> 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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