558: Difference between revisions
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|model=558 | |model=558 | ||
|class=frequency standards and meters | |class=frequency standards and meters | ||
|summary= | |summary=frequency meter | ||
|image=GR 558 Case Open A.jpg | |image=GR 558 Case Open A.jpg | ||
|caption=General Radio 558 Amateur Band Frequency Meter | |caption=General Radio 558 Amateur Band Frequency Meter | ||
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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 absportion 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 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 thev [358]]. Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter. | ||
==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 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 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% | * '''Frequency Calibration Accuracy:''' 0.25% | ||
Revision as of 04:03, 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 absportion 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 thev [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%
