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Rega's flagship Mercury and Solis pre/power amplifiers are finally a reality and promise "no-compromise" audio performance

At long last, Rega has confirmed that these top-of-the-range pre/power amplifiers are finally ready: the Mercury ...
insider.si.edu

RCA type 3A4 power amplifier pentode

A 7-pin glass base with tipped T-shaped envelope. Miniature tube. Stamped: “Electron / Tube [RCA logo]”. Donor’s card reads: “Power amplifier pentode made by the Radio Corporation of America. Designed ...