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Edwin Armstrong, Inventor, Father of FM Radio, 1983 HF First Issue USA
United States Commemorative Postage Stamp Honoring American Inventor Edwin H. Armstrong,
Edwin H. Armstrong, Father of FM Radio, Frequency Modulation Transmission, He devised the superheterodyne circuit which is the basic circuit used in most radio and television receivers.
Issued September 21, 1983 in Washington, DC,
First Day of Issue Cover, FDC, House of Farnam Engraving Cachet, Unaddressed, Ideal for Framing,
Cover in Removable Transparent Poly Sleeve and Mailed With Protection,
Made in the USA
Genuine First Day of Stamp Issued Cover Cancelled on the First Day of Issue Date by the U.S. Postal Service,
Edwin H. Armstrong, Father of FM Radio, Frequency Modulation Transmission, He devised the superheterodyne circuit which is the basic circuit used in most radio and television receivers.
Issued September 21, 1983 in Washington, DC,
First Day of Issue Cover, FDC, House of Farnam Engraving Cachet, Unaddressed, Ideal for Framing,
Cover in Removable Transparent Poly Sleeve and Mailed With Protection,
Made in the USA
Genuine First Day of Stamp Issued Cover Cancelled on the First Day of Issue Date by the U.S. Postal Service,
