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558-P: Difference between revisions
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The '''General Radio 558-P Amateur Band Frequency Meter''' was introduced in 1930 Catalog F1 and available through 1931 Bulletin 933. | The '''General Radio 558-P Amateur Band Frequency Meter''' was introduced in 1930 Catalog F1 and available through 1931 Bulletin 933. | ||
The Type 558-P is an absorption type wavemeter which is identical to Type [[558]] except the neon resonance indicator discontinued. It retains the same five bands and 0.25% accuracy but resonance is determined by reaction of the device under examination. Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter. A accessory low frequency coil is available as Type [[558-P6]]. If a [[558-P6]] coil is purchased separately your meter would have to be returned to the factory for calibration with that particular coil-meter commbination. | |||
==Specifications== | ==Specifications== | ||