558: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 19: | Line 19: | ||
The Type 558 is an absortion type wavemeter covering the five popular amateur radio bands. Its an improved version | The Type 558 is an absortion 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% [[358]] and the inclusion of fifth VHF band. 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 for that particular meter. | 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 the [[358]]. Each wavemeter is supplied with a calibration chart produced with settings for that particular meter. | ||
==Specifications== | ==Specifications== | ||
Revision as of 17:58, 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 absortion 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 the358 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 for that particular meter.
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 Calibration Accuracy: 0.25%
