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The frequency meter works on the principle of moving a constant amount of charge per cycle, integrating this charge into a current, and measuring the current. | The frequency meter works on the principle of moving a constant amount of charge per cycle, integrating this charge into a current, and measuring the current. | ||
The output is generated at the plates of three [[6AG7]] triodes that run in parallel. | |||
It was designed by [[Howard Vollum]] and Charles Sanford. | It was designed by [[Howard Vollum]] and Charles Sanford. | ||