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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== | ||