558: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
|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 | ||
|series= | |series=558 | ||
|introduced=1928 | |introduced=1928 | ||
|discontinued=1929 | |discontinued=1929 | ||
Revision as of 23:24, 3 April 2024
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. Its an improved version of the earlier 358 wavemeter but 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%
