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{{Catalog History}} | {{Catalog History}} | ||
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The | 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. Its an improved version | ||