Pentode and Triode tube models. Parallel saturation with two AX7 models. Air provides gorgeous lift . Sounds stunning on busses and tracks. To mark Plugin Week, here’s our pick of the most out-there ...

This Design Idea is a reprint of an earlier one that contained errors in graphics (Reference 1). Even though 6L6 beam-power tubes have been around for 66 years, they are still quite popular for use in ...

A pentode with a 6-pin plastic base, top contact, screen grid, domed envelope. Stamped on top: "Western Electric / Made in U.S.A. / 337A". Data sheet notes: "A variable-mu pentode of the unipotential ...

A pentode with a 6-pin plastic base (loose), top contact, domed glass envelope. Indirectly heated cathode. Heater voltage: 10, AC or DC; heater current: 0.32 amperes; plate voltage: 135 or 180. "A ...