Availability
Penta Laboratories Vacuum Tubes & Electron Tubes
Founded in 1951, Penta Laboratories has grown into one of the world’s leading manufacturers of vacuum tubes and electron tubes for applications ranging from high-end...
Founded in 1951, Penta Laboratories has grown into one of the world’s leading manufacturers of vacuum tubes and electron tubes for applications ranging from high-end audio to broadcast, medical, military, science and more. The company—perhaps best known for developing the beam-powered Pentode vacuum tube—balances state-of-the-art manufacturing operations and quality control processes with a strong commitment to excellence in customer service.
Penta Laboratories’ success is predicated on an aggressive product development program that continues to churn out cutting-edge products backed by strict standards in design evaluation,...
Founded in 1951, Penta Laboratories has grown into one of the world’s leading manufacturers of vacuum tubes and electron tubes for applications ranging from high-end audio to broadcast, medical, military, science and more. The company—perhaps best known for developing the beam-powered Pentode vacuum tube—balances state-of-the-art manufacturing operations and quality control processes with a strong commitment to excellence in customer service.
Penta Laboratories’ success is predicated on an aggressive product development program that continues to churn out cutting-edge products backed by strict standards in design evaluation, testing, production and delivery. In addition to staying at the forefront of new technologies, the company maintains an extensive inventory of replacement radio tubes, triodes, diodes, tetrodes, and more parts for equipment dating back more than 75 years.
3-500ZG Pair Matched Vacuum Tubes, High-Mu Power Triode, 500W, Ceramic Base, Set of 2
Part Number: PLB-3-500ZG-2
Estimated Ship Date: Today
Estimated Ship Date: Today
4CX800A Single Ceramic Vacuum Tube, Thompson Brand, GU74B Equivalent, RF Power Tetrode, 800W Max. Dissipation, Each
Part Number: PLB-4CX800A-T
Estimated Ship Date: Today
Estimated Ship Date: Today
3-500ZG Vacuum Tube, High-Mu Power Triode, 500W, Ceramic Base, Each
Part Number: PLB-3-500ZG
Estimated Ship Date: Today
Estimated Ship Date: Today
811A Four Matched Vacuum Tubes, High-Mu Power Triode, 160W, 30 MHz, Set of 4
Part Number: PLB-811A-4
Estimated Ship Date: Today
Estimated Ship Date: Today
OM-Power Amplifier Tetrode FU-728F for OM2000+, OM2000A, OM2500 and OM4000, Each
Part Number: PLB-FU-728F
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
3CX3000A7 Ceramic Vacuum Tube, High-Mu Power Triode, Each
Part Number: PLB-3CX3000A7
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
572B Three Matched Vacuum Tubes, Power Triode, Direct replacement for the 811A, Set of 3
Part Number: PLB-572B-3
Estimated Ship Date: Today
Estimated Ship Date: Today
3CX1500A7 / 8877 Ceramic Vacuum Tube, High-Mu Power Triode, 1500W, 250 MHz, Each
Part Number: PLB-3CX1500A7
Estimated Ship Date: Today
Estimated Ship Date: Today
572B Pair Matched Vacuum Tubes, Power Triode, Direct replacement for the 811A, Set of 2
Part Number: PLB-572B-2
Estimated Ship Date: Today
Estimated Ship Date: Today
811A Three Matched Vacuum Tubes, High-Mu Power Triode, 160W, 30 MHz, Set of 3
Part Number: PLB-811A-3
Estimated Ship Date: Today
Estimated Ship Date: Today
3-500ZG Four Matched Vacuum Tubes, High-Mu Power Triode, 500W, Ceramic Base, Set of 4
Part Number: PLB-3-500-ZG-4
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
811A Vacuum Tube, High-Mu Power Triode, 160W, 30 MHz, Each
Part Number: PLB-811A
Estimated Ship Date: Today
Estimated Ship Date: Today
572B Vacuum Tube, Power Triode, Direct replacement for the 811A, Each
Part Number: PLB-572B
Estimated Ship Date: Today
Estimated Ship Date: Today
572B Four Matched Vacuum Tubes, Power Triode, Direct replacement for the 811A, Set of 4
Part Number: PLB-572B-4
Estimated Ship Date: Today
Estimated Ship Date: Today
3CX800A7 Ceramic Vacuum Tube, Compact Power Triode, 750W PEP Output to 350 MHz, Each
Part Number: PLB-3CX800A7
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
811A Pair Matched Vacuum Tubes, High-Mu Power Triode, 160W, 30 MHz, Set of 2
Part Number: PLB-811A-2
Estimated Ship Date: Today
Estimated Ship Date: Today
3CX800A7 Ceramic Pair Matched Vacuum Tubes, Compact Power Triode, 750W PEP Output to 350 MHz, Set of 2
Part Number: PLB-3CX800A7-2
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
3-500ZG Three Matched Vacuum Tubes, High-Mu Power Triode, 500W, Ceramic Base, Set of 3
Part Number: PLB-3-500ZG-3
Not Yet Reviewed
Estimated Ship Date: Nov 9, 2026 if ordered today
Estimated Ship Date: Nov 9, 2026 if ordered today
4CX1000A Ceramic Vacuum Tube, Radial-Beam Power Tretrode, 1000W, 110 MHz, Each
Part Number: PLB-4CX1000A
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today