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The Type 558 is an absorption-type wavemeter covering the five popular amateur radio bands.   
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.  
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.  
The 558 uses a neon-type resonance indicator instead of the 358's incandescent lamp.  

Revision as of 09:24, 24 August 2024

General Radio 558
Frequency meter
General Radio 558 Amateur Band Frequency Meter

Available from 1928 to 1929

Manuals
Catalog History
 Document Year Page
Bulletin 930 1928 9375
Catalog E1 1928 79
Catalog E2 1928 79
(All manuals in PDF format unless noted otherwise)

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%

Links

Photos