Vacuum tube datasheets — free PDF archive

Direct PDF downloads of the original manufacturer datasheets behind each tube in the Amperatubes catalog — 315 entries from RCA, Mullard, Tung-Sol, GE, Sylvania, Western Electric, Philips and their contemporaries. Each PDF is paired with the corresponding Amperatubes reference page where the specs are normalised, the equivalents listed and the SPICE models — when available — wired into a live loadline calculator.