[Boatanchors] DE-MAGNETIZING A METER

[mac]

Never heard of "de-magnetizing" a meter.  Like Gary says, sounds like  
somebody messed with the springs to make it a zero center meter.

Or, maybe it actually IS a zero center instrument.  How does the scale  
read?

Dennis D. W7QHO
Glendale, CA



On Mar 12, 2010, at 2:00 PM, Gary Schafer wrote:

> I doubt that it is a magnetization problem. It may have gotten  
> zapped one
> time and distorted the return springs. Or someone may have needed a  
> zero
> center meter and adjusted the springs.
>
> There are two springs. One is usually adjusted with the zero adjust  
> on the
> front. The other is the same but you have to take the meter out of  
> the case
> to adjust it. It will be like the front one but located at the back  
> end of
> the movement. Sometimes they are easy to adjust and sometimes a pain.
>
> 73
> Gary  K4FMX
>
>> -----Original Message-----
>> From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
>> bounces at mailman.qth.net] On Behalf Of Mr. and Mrs. Magoo
>> Sent: Friday, March 12, 2010 3:19 PM
>> To: boatanchors at mailman.qth.net
>> Subject: [Boatanchors] DE-MAGNETIZING A METER
>>
>> Anyone know how to do this without causing harm to the meter?  I  
>> have a
>> nice
>> 200 ua meter I want to use in a homebrew wattmeter but the movement  
>> is
>> magnetized and reading about 1/2 scale.  It's not dirt...the vane  
>> moves
>> freely down from full to half scale and down from mid scale to zero  
>> but
>> it
>> always returns to mid scale.
>>
>> Bill, VE3NH
>>
>>
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