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[AMPS] Power measurement

To: <amps@contesting.com>
Subject: [AMPS] Power measurement
From: Peter.Chadwick@gpsemi.com (Peter Chadwick)
Date: Wed, 9 Jul 1997 13:24:00 +0100
Rich said

> I once saw an amplifier that
>delivered an apparent efficiency of115% due to wattmeter error.
>. . Rich---

A professional accredited laboratory doing type approval needs to be
able to measure power conducted to a load to within +/-5%, and that's
not that easy. Rich makes a very good point that shouldn't be forgotten
- it's very easy to be misled just because a meter says something. Even
more so if it's a digital meter. Even bigger liars can be spectrum
analysers and FET probes!

73

Peter G3RZP


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