[Elecraft] OT: Bird Wattmeter "meter failures"

[Ron D'Eau Claire]

If you want to rely on a piece of test equipment it MUST be serviced and
calibrated regularly. The Bird wattmeter I carried as a marine radio service
tech was calibrated annually without fail, or immediately after I dropped a
slug! Banging on a slug it the quickest way to change the calibration.
That's why they are kept in the spaces provide on the meter housing when not
in use. 

All of the Birds I've seen in Ham's hands have calibration stickers many
years old. 

73, Ron AC7AC