558-P: Difference between revisions
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* [[Media:GR Exp 558 03_1928.pdf|Experimenter describing Type 558 March 1928]] | * [[Media:GR Exp 558 03_1928.pdf|Experimenter describing Type 558 March 1928]] | ||
* [[Media:GR Exp 558 03_1929.pdf|Experimenter describing Type 558 March 1929]] | * [[Media:GR Exp 558 03_1929.pdf|Experimenter describing Type 558-P March 1929]] | ||
==Photos== | ==Photos== | ||
Revision as of 04:21, 2 April 2024
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 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%
