I have a 1000w metered Bird Termaline #694 oil filled wattmeter that is not
reflecting accurately the power output level. When contrasted against another
calibrated 1000W device, the Bird registers about 800W. The non-inductive
load measures a perfect 50 ohm input so the problem lies elsewhere. The
factory manual indicates that there are no means available "in the field" to
adjust the internal circuitry for proper calibration. I'm not certain if that
is a veiled invitation for the need to send it back to the factory for big
bucks servicing. Radio amateurs are well known for their ability to overcome a
whole range of obstacles, consequently, this posting is made in the hopes of
finding a solution if any to the calibration problem. Any assistance would be
greatly appreciated. Ron W2CQM/3
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