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(Created page with "Type '''558 Amateur-Band Wavemeter'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Frequency Standards and Meters") |
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{{GR Product | |||
|model=558 | |||
|codes=UNION | |||
|class=frequency standards and meters | |||
|summary=Frequency meter | |||
|image=GR 558 Case Open A.jpg | |||
|caption=General Radio 558 Amateur Band Frequency Meter | |||
|series=558 | |||
|introduced=1928 | |||
|discontinued=1929 | |||
|designers= | |||
|manuals= | |||
* [[Media:GR 558 Wavemeter 500-11-15-28.pdf|558 Instruction Card 500-11-15-28]] | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 558 Amateur Band Frequency Meter}} was introduced in {{Bulletin 930}} and {{Catalog E1}} / {{Catalog E2}}. | |||
The Type 558 is an absorption-type wavemeter covering the five popular amateur radio bands. | |||
It is an improved version of the earlier [[358]] wavemeter, targeted for amateur radio use with 0.25% accuracy as compared to 1% of the [[358]], and the inclusion of fifth VHF band coil. Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter. The variable condenser used is a Type [[557]]. | |||
The 558 uses a neon-type resonance indicator instead of the 358's incandescent lamp. | |||
==Specifications== | ==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% | |||
==Links== | ==Links== | ||
* [[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]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 558 Case Open A.jpg | |||
GR 558 Case.jpg | |||
GR 558 Case Open.jpg | |||
GR 558 Calibration Chart.jpg | |||
GR 558 Calibration Chart Scan.png | |||
GR 558.jpg | |||
GR 558 Coil Set.jpg | |||
GR 558 Tuning Unit.jpg | |||
GR 558 Tuning Unit Open.jpg | |||
GR 558 Tuning Unit Close-up.jpg | |||
GR 558 Tuning Unit Close-up A.jpg | |||
</gallery> | </gallery> | ||
[[Category:Frequency Standards and Meters]] | [[Category:Frequency Standards and Meters]] | ||
Latest revision as of 00:25, 25 August 2024
The General Radio 558 Amateur Band Frequency Meter was introduced in Bulletin 930 (1928) and Catalog E1 (1928) / Catalog E2 (1928).
The Type 558 is an absorption-type wavemeter covering the five popular amateur radio bands.
It is an improved version of the earlier 358 wavemeter, targeted for amateur radio use with 0.25% accuracy as compared to 1% of the 358, and the inclusion of fifth VHF band coil. Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter. The variable condenser used is a Type 557.
The 558 uses a neon-type resonance indicator instead of the 358's incandescent lamp.
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%
