overall: 4 1/4 in x 1 3/4 in; 10.795 cm x 4.445 cm
Object Name:
vacuum tube
triode
Date made:
ca 1921
Description (Brief):
A 4-pin brass base shell with ceramic insulator, tipped S-shaped envelope. Stamped on envelope: old style RCA logo, GE logo; on base: "Radiotron / model UV-201 / Patented / Licensed for Amateur / or Experimental Use Only." References: Tyne, "Saga of the Vacuum Tube," pages 298, 309-315, 360; https://www.radiomuseum.org/tubes/tube_uv201a.html.