Scott 451C (c. 1973–1974)
Little is documented about the Scott 451C beyond its appearances in the audio trade press between late 1973 and late 1974.
The 451C covered a range of 45 to 130 dBc and met or exceeded ANSI type S3C accuracy. Its large meter read directly in dBc, with no interpolation or computation, so non-technical personnel could use it. Scott's own advertising called it the first truly professional meter small enough to fit in a pocket, at a pocket-money price. It ran on batteries and came in a rugged case.
Audio (November 1974, p.70) checked the meter's accuracy against a GR Model 1565A at the same location from the sound source, attenuating the source in 10 dB steps, and reported excellent results. The same review credited the FET input stage. It also added a hand-held caveat: a meter you hold picks up noise from your own motion.
Known specs from the period record:
- Type: pocket-sized sound level meter
- Range: 45–130 dBc sound pressure level
- Accuracy: meets or exceeds ANSI type S3C
- Display: large, easy-to-read meter, direct reading in dBc
- Power: battery
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