558-P: Difference between revisions
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{{GR Product | {{GR Product | ||
|model=558-P | |model=558-P | ||
|codes=UNION | |||
|class=frequency standards and meters | |class=frequency standards and meters | ||
|summary= | |summary=Frequency meter | ||
|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 | ||
| Line 12: | Line 13: | ||
* [[Media:GR 558-P Instructions Form 16 500-9-25-29.pdf|558 Instruction Card 500-9-25-29]] | * [[Media:GR 558-P Instructions Form 16 500-9-25-29.pdf|558 Instruction Card 500-9-25-29]] | ||
{{Catalog History}} | {{Catalog History}} | ||
}} | }} | ||
The | The {{Title|General Radio 558-P Amateur Band Frequency Meter}} was introduced in {{Catalog F1}} and remained available through {{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== | ==Specifications== | ||
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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== | ||
| Line 38: | Line 39: | ||
GR 558-P Meter Interior.jpg | GR 558-P Meter Interior.jpg | ||
GR 558-P Calibration Chart.png | GR 558-P Calibration Chart.png | ||
GR Condenser Brace Top.jpg | |||
GR Condenser Brace Bottom.jpg | |||
GR Condenser Brace Side.jpg | |||
</gallery> | </gallery> | ||
[[Category:Frequency Standards and Meters]] | [[Category:Frequency Standards and Meters]] | ||
Latest revision as of 08:54, 2 October 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%
