Ok, that's what I was thinking of doing. I know the article in QST had a
schematic from the author on how to build a test rig to do it. I'll just go
with your method, easier!
73,
Scott
----- Original Message -----
From: "Jeff Carter" <amps@hidden-valley.com>
To: <amps@contesting.com>
Sent: Wednesday, March 04, 2009 7:27 PM
Subject: Re: [Amps] Panel Meter Article, QST
Hi again, Scott,
I'm sure everybody has their own method, but here's what I do:
I take a variable power supply and a handful of known-good,
known-value resistors. Starting with the highest value (say 10K
Ohms), I hook the meter up in series with the power supply and
resistor.
Turning the voltage up *slowly*, I try to dead-center the full-deflection
value.
Then, it's an Ohms Law problem. Say the power supply gives 5VDC at
full meter deflection, and your resistor was a 10k. 5VDC/10K ohms
gives 500 microamps, which is your meter's full deflection value.
Good luck!
Jeff/KD4RBG
http://www.kd4rbg.com
---- Original message ----
>Date: Wed, 4 Mar 2009 19:14:59 -0600
>From: KBØNLY <kb0nly@mchsi.com>
>Subject: [Amps] Panel Meter Article, QST
>To: <amps@contesting.com>
>
>While not strictly amp related i figured someone on here would know, there
>was an article in QST a while back showing how to determine the full scale
>value of an unknown analog meter, i can't find that searching the members
>only part of the ARRL website but i know its there somewhere.
>
>Anyone know??
>
>While working on my recent amp project i unearthed a few unknown meters
>from my junkbox and i would like to check their function and value.
>
>73,
>
>Scott KBØNLY
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