558

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

• Experimenter describing Type 558 March 1928
• Experimenter describing Type 558 March 1929

Photos

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