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Over 1 Million Tubes in Stock! See Our Inventory


Showing 1–6 of 130 items

  • 12AU7

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  • 12AX7A

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  • 12AX7M

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  • 2J55

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  • 3-500ZG

    The Penta Laboratories 3-500ZG is a high-mu power triode with a maximum plate dissipation rating of 500 watts. Cooling is by radiation and forced air through the base, along the envelope, and over the plate seal and radiator-type plate connector. It is intended for use as a zero-bias Class AB2 amplifier in radio-frequency or audio frequency applications. By eliminating the bias supply, zero grid bias operation greatly simplifies circuitry design. When operated in a cathode-driven circuit, a power gain of as much twenty times is achievable. Featuring a new design for longer life, the ceramic base provides better temperature control.


Showing 1–6 of 130 items