Back on December 3, 2024, a Design Idea (DI) was published, “Single-supply single-ended inputs to pseudo class A/B differential output amp,” which created some discussion about using the circuit as a ...
Helium-filled half-wave rectifier. A 4-pin base with brass shell and ceramic insulator. Tipped S-shaped envelope. Maker's stamping on base reads: "Raytheon / Type B Patented / June 27, 1922 July 7, ...
A plastic 4-pin base with tipless domed envelope. Stamped on envelope: "83". Donor’s card reads: “Full-wave mercury vapor rectifier made by the Radio Corporation of America about 1935 or before.
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