Armstrong Superheterodyne Radio Circuit - and 50 similar items

1920 Armstrong Superheterodyne Radio Circuit Mug – RCA Tribute Edition Step back into 1920 — the year when Edwin Armstrong turned a tangle of coils and vacuum tubes into the future of radio. This mug celebrates his legendary superheterodyne receiver, the invention that made RCA a household name and forever changed how the world tuned in! Featuring the original 1920 schematic of Armstrong’s circuit (yes, the real deal!) and the classic RCA “Worldwide Wireless” logo from 1922, this design is a perfect blend of engineering genius and vintage flair. Whether you’re a ham radio operator, collector of early electronics, or just someone who appreciates the smell of vacuum tubes in the morning — this mug will make your coffee taste like pure innovation ?? ? Details Large 15oz mug — perfect for long late-night radio sessions High-quality sublimation print on glossy ceramic Available in multiple color variants: navy blue, red, green, black, dark blue, and maroon (color applies to handle and interior) Packed in a black gift box with a viewing window — perfect for gifting Dishwasher and microwave safe ? Note to Buyer Each mug is carefully packed and shipped with radio-level precision ?? ? Perfect Gift For Vintage radio lovers RCA and Armstrong fans Engineers, inventors, and dreamers Anyone who still says “Roger that” when answering the phone