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558-P: Difference between revisions
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* [[Media:GRwiki Bulletin 933 OCR 1931.pdf|Bulletin 933 (1931)]], p.25 | * [[Media:GRwiki Bulletin 933 OCR 1931.pdf|Bulletin 933 (1931)]], p.25 | ||
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The '''General Radio 558-P Amateur Band Frequency Meter''' was introduced in 1930 | The '''General Radio 558-P Amateur Band Frequency Meter''' was introduced in 1930 Catalog F1 and available through 1931 Bulletin 933. | ||
==Specifications== | ==Specifications== | ||