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Showing all 11 items

  • 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.

    $269.95
  • 3-500ZG Matched Pair

    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.

    $539.95
  • 3-500ZG Matched Quad

    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.

    $1,079.95
  • 3-500ZG Matched Trio

    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.

    $809.95
  • 572B

    The Penta Laboratories is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.

    $89.95
  • 572B Matched Pair

    The Penta Laboratories is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.

    $179.90
  • 572B Matched Quad

    The Penta Laboratories is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.

    $359.80
  • 572B Matched Trio

    The Penta Laboratories is a power triode designed for use as a RF Oscillator, RF Power Amplifier and audio frequency modulator. The 572B is a direct replacement for the 811A, but has a graphite anode for increased performance and reliability.

    $269.85
  • 811A

    The Penta Laboratories 811A is a high mu power triode designed for service as an audio frequency amplifier or modulator, or as an RF amplifier or oscillator. The 811A is capable of outputting up to 160 watts at frequencies up to 30 MHz.

    $39.95
  • 811A Matched Pair

    The Penta Laboratories 811A is a high mu power triode designed for service as an audio frequency amplifier or modulator, or as an RF amplifier or oscillator. The 811A is capable of outputting up to 160 watts at frequencies up to 30 MHz.

    $79.95
  • 811A Matched Quad

    The Penta Laboratories 811A is a high mu power triode designed for service as an audio frequency amplifier or modulator, or as an RF amplifier or oscillator. The 811A is capable of outputting up to 160 watts at frequencies up to 30 MHz.

    $159.95

Showing all 11 items