[Boatanchors] Boatanchors Digest, Vol 74, Issue 15

[rbethman]

Simply placing the ENTIRE meter movement into a degaussing coil would 
REALLY not be a "smart" thing to do.

There is a permanent magnet in the body of a meter.

This could cause the meter to become useless, depending on the level of 
the degaussing field.

The other idea of attempting to remove static from the meter cover is 
the smartest FIRST move.

The second would be to remove the housing from the meter, and check the 
front and rear spring positions.  This would be VERY likely the source 
of the problem.  The previous owner may indeed have wanted a centered 
needle meter for their purpose.

It may have been used as the meter for an older style FM receiver.  
These used to have such a meter.  One would tune to the station until 
the needle was centered.  These were normal prior to the FM "auto" 
tracking circuitry.

Bob - N0DGN

On 3/13/2010 2:21 PM, Henry Mei'l's wrote:
> I use a metal enclosed (probably aluminum) TV deflection coil for
> demagnitixing items -  I just apply ac to the coil windings and insert the
> item into the center of the coil.
>
> Copenhagen greetings,
> Henry, OZ1UF
>
>    
>> Message: 1
>> Date: Fri, 12 Mar 2010 15:19:27 -0500
>> From: "Mr. and Mrs. Magoo"<magoo at isp.ca>
>> Subject: [Boatanchors] DE-MAGNETIZING A METER
>> To:<boatanchors at mailman.qth.net>
>> Message-ID:<36DE87EC71DF47968BAC1426ED7F7F56 at MCHUGHU64FGOY>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> 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