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The '''General Radio 558 Amateur Band Frequency Meter''' was introduced in 1928 Bulletin 930 and Catalogs E1 and E2. | The '''General Radio 558 Amateur Band Frequency Meter''' was introduced in 1928 Bulletin 930 and Catalogs E1 and E2. | ||
The Type 558 is an | The Type 558 is an absorption type wavemeter covering the five popular amateur radio bands. Its an improved version | ||
of the earlier [[358]] wavemeter with .25% accuracy as compared to 1% of the [[358]] and the inclusion of fifth VHF band coil. The 558 uses a neon type resonance indicator which is change from the incandescent lamp used by | of the earlier [[358]] wavemeter targeted for amateur radio use with .25% accuracy as compared to 1% of the [[358]] and the inclusion of fifth VHF band coil. The 558 uses a neon type resonance indicator which is change from the incandescent lamp used by the [[358]]. Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter. | ||
==Specifications== | ==Specifications== | ||
Revision as of 21:37, 1 April 2024
The General Radio 558 Amateur Band Frequency Meter was introduced in 1928 Bulletin 930 and Catalogs E1 and E2.
The Type 558 is an absorption type wavemeter covering the five popular amateur radio bands. Its an improved version of the earlier 358 wavemeter targeted for amateur radio use with .25% accuracy as compared to 1% of the 358 and the inclusion of fifth VHF band coil. The 558 uses a neon type resonance indicator which is change from the incandescent lamp used by the 358. Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter.
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%
