SUPERADIO Detector Single Stage Amplifier The Wireless Age Magazine Jan. 1921 P3

This rare, ancient, Wireless Age, January 1921 issue of the now defunct, early radio magazine - The Wireless Age - on Page 3 had the following;

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"SUPERADIO
This mark of distinction on all our apparatus is the symbol of SUPREMACY.

Type D A-1, the BEST Detector and Single Stage Amplifier in the WORLD, with the new Filament Temperature Indicator, price $45.00"

L. M. Cockaday and Co. Federal Radio Accessories and Parts.

"Federal Radio Accessories and Parts are Distinguished for Their Reliability, Quality and Efficiency." Circuit diagram for a two stage amplifier. "the 226-W Transformer is endorsed by the leading engineers and conceeded to be the best transformers on the market."

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