[Amps] Calibrate a panel meter?

[Karl-Arne Markström]

They will read high in a non-ferrous panel, as the magnetic shunt around the poles of the
stationary parts of the movement magnetic circuit provided by the steel panel will be absent.

73/

Karl-Arne
SM0AOM

----- Original Message ----- 
From: "Vic K2VCO" <vic at rakefet.com>
To: "Bill Turner" <dezrat1242 at ispwest.com>; "Amps reflector" <amps at contesting.com>
Sent: Wednesday, December 28, 2005 9:28 PM
Subject: Re: [Amps] Calibrate a panel meter?


> Bill Turner wrote:
> 
> > Is there a way to calibrate it by adjusting anything inside? Moving 
> > the magnets around, etc? I'm sure the factory calibrates them somehow 
> > but I've never read anything in the ham literature about how to do it.
> 
> Most older or surplus meters were calibrated for a steel panel.  When 
> you use them on an aluminum panel, they read wrong....I *think* they 
> read low in a non-ferrous panel, but I can't swear to it (someone else 
> will know).
> 
> If that's the case you might be able to improve the accuracy by cutting 
> out a steel ring (O.D. maybe 1/2" or more than the I.D.) and putting it 
> around the meter in back of the aluminum panel.
> 
> Just a thought.
> -- 
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
> 
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.371 / Virus Database: 267.14.8/215 - Release Date: 2005-12-27
> 
> 


-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.371 / Virus Database: 267.14.8/215 - Release Date: 2005-12-27