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 The {{Title|General Radio 558 Amateur Band Frequency Meter}} was introduced in {{Bulletin 930}} and {{Catalog E1}} / {{Catalog E2}}.
-The Type 558 is an absorption type wavemeter covering the five popular amateur radio bands.  Its an improved version
+The Type 558 is an absorption-type wavemeter covering the five popular amateur radio bands.
-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.
+It is an improved version of the earlier [[358]] wavemeter, targeted for amateur radio use with 0.25% accuracy as compared to 1% of the [[358]], and the inclusion of fifth VHF band coil. Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter.
+The 558 uses a neon-type resonance indicator instead of the 358's incandescent lamp.
 ==Specifications==