558-P: Difference between revisions
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|image=GR 558-P Case Open.jpg | |image=GR 558-P Case Open.jpg | ||
|caption=General Radio 558-P Amateur Band Frequency Meter | |caption=General Radio 558-P Amateur Band Frequency Meter | ||
|series= | |series=558 | ||
|introduced=1930 | |introduced=1930 | ||
|discontinued=1931 | |discontinued=1931 | ||
Revision as of 22:25, 3 April 2024
The General Radio 558-P Amateur Band Frequency Meter was introduced in Catalog F1 (1930) and remained available through Bulletin 933 (1931).
The Type 558-P is an absorption type wavemeter which is identical to Type 558 except the neon resonance indicator has been 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. An 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 combination.
Specifications
- Frequency Range: five bands, 3.5 to 4.0 MHz, 7.0 to 8.0 MHz, 14.0 to 16.0 MHz, 28 to 32 MHZ, 56 to 51 MHz
- Frequency Calibration Accuracy: 0.25%
