# Vacuum Tubes

The first electronic amplification of sound was done with Vacuum Tubes. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today.
Vacuum Tube - 12SA7GT, Pentagrid Converter
Pentagrid converter designed to minimize frequency drift. They are intended for service as combined oscillators and mixers in AC, storage battery, and AC/DC operated superheterodynes.
$5.90 Vacuum Tube - 6550A, Valve Art Octal power tube (Max Plate Watts = 42W) Starting at$37.14
Vacuum Tube - 6550A-STR, Tube Amp Doctor, Premium Selected
The Tube Amp Doctor 6550A-STR is built and performs to the same standards as the highly sought after GE 6550A. TAD has meticulously designed the plate material to be as strong and pure as possible resulting in an exceptionally stable, consistent, and reliable 6550. The TAD 6550A features a thick straight glass envelope, a metal base, and an authentic triple getter. The frequency response of this tube is remarkably balanced and smooth. Transparent natural lows and thick rich mids with silky highs make this an excellent tube for HiFi equipment as well as classic bass guitar amplifiers. The Tube Amp Doctor 6550A-STR offers outstanding performance in all applications. This tube is matched for both plate current and transconductance. The TAD 6550A-STR also passes all of the tests required in the Premium Selection process.
Starting at $53.10 Vacuum Tube - 6BN8, Dual Diode, Triode Miniature, high mu triode, double diode intended for application in color and monochrome television receivers. Separate cathode connections for each section and controlled heater warm-up time to insure dependable operation in series string receivers$8.95
Vacuum Tube - 1U4, Pentode
Miniature, filamentary, sharp-cutoff pentode intended for radio frequency or intermediate frequency amplifier use in battery-operated receivers.
$6.90 Vacuum Tube - 25L6GT / 25W6, Beam Power Amplifier, Tubular Glass Beam pentode designed for use in the audio-frequency power output stage of radio and television receivers. Features include high power sensitivity and high efficiency at relatively low plate and screen voltages.$6.90
Vacuum Tube - 35C5, Tetrode, Beam Power
Miniature beam pentode primarily designed for use in the audio-frequency power output stage of radio receivers. Features include high power sensitivity and high efficiency at relatively low plate and screen voltages.
$15.90 Vacuum Tube - ECC823, JJ Electronics, Dual Triode In the ECC823, Section 1 of the tube (pins 6, 7, and 8) is the low gain 12AU7/ECC82 spec (gain factor 17) and Section 2 (pins 1, 2, and 3) is the high gain 12AX7/ECC83 spec (gain factor 100).$14.95
Vacuum Tube - 12BV7 / 12BY7A, Pentode
Miniature power pentode designed primarily for use as the video output amplifier in television receivers. Like the 12BY7, it features high transconductance, high power sensitivity, and low interelectrode capacitances.
$13.90 Vacuum Tube - 5749 / 6BA6W, Pentode, Remote Cut-Off Miniature remote-cutoff pentode intended for use as a high-gain radio frequency or intermediate-frequency amplifier. Its remote-cutoff characteristic makes it suitable for use in circuits to which it is desired to apply automatic-gain-control.$4.90
Vacuum Tube - 6SG7, Pentode, Semi Remote
Remote-cutoff pentode designed for use as a high-gain radio or intermediate-frequency amplifier. Features of the tube include high transconductance, low grid-plate capacitance, and a dual cathode connection
$6.90 Vacuum Tube - EL84, Groove Tubes, Matched Pair Package of 2 Groove Tube's Gold Series EL84. The warmest Groove Tube in this family. It remains very buttery, with relatively high power output and very even response. A great replacement for many modern stock amps, overcoming a variety of design issues and limitations in inexpensive tube amps.$44.00
Vacuum Tube - 6V6GT / CV-511, Genalex Gold Lion
Genalex Gold Lion 6V6GT / CV511 beam-power tube. Made in Russia.
Starting at $32.75 Vacuum Tube - 6202 / 6X4WA, Rectifier, Full Wave Miniature full-wave high-vacuum rectifier intended for use in power supplies which have low d-c output-current requirements.$11.90
Vacuum Tube - KT88, Electro-Harmonix
Electro-Harmonix KT88 Vacuum Tube High power kinkless-tetrode for use in amplifiers such as the Marshall Major. This tube is a favorite of audiophiles. Can be used in place of 6550 for a more "round" bass signature.
Starting at $41.95 Vacuum Tube - 5879, Pentode, Sharp Cut-Off Sharp-cutoff pentode of the 9-pin miniature type intended for use as an audio amplifier in applications requiring reduced microphonics, leakage noise, and hum.$12.90
Vacuum Tube - 6550, Electro-Harmonix
Superior high-power Octal Beam Tetrode, suitable for any amp using 6550 or KT88. Designed to hold up in even the most punishing environment of high powered bass amps, such as Ampeg SVT. With 42 watts of plate dissipation in tetrode operation and 44 watts in triode, power is improved even over desirable vintage types.
Starting at $41.50 Vacuum Tube - 6BL8 / 6LN8, Triode, Pentode Triode-pentode in the 9 pin miniature construction. It is designed for use as a frequency changer in television receivers.$6.90
Vacuum Tube - 6K7, Pentode, Remote Cut-Off
Variable mu pentode amplifier in the octal metal (glass) construction. It is suitable for use with AVC in RF and IF amplifiers and minimizes cross modulation.
$6.90 Vacuum Tube - 6SQ7GT, Diode, Dual Triode Duplex-diode high-mu triode intended primarily for use as a combined detector, amplifier, and automatic-volume-control tube in radio receivers. The triode section incorporates a high amplification factor$5.90
Vacuum Tube - 12AX7WC, Sovtek
Sovtek 12AX7WC dual triode preamp tube. Made in Russia.
$14.95 Vacuum Tube - EL84M, Sovtek Sovtek EL84M / 6BQ5WA power pentode. Made in Russia. Starting at$22.95
Vacuum Tube - 7189, Tung-Sol Reissue
Tung-Sol has reissued the rare 7189, a high fidelity audio specific variation on the EL84 tube. In addition to the increased fidelity, the 7189 features a higher maximum plate voltage rating of 400V. These tubes are great for both guitar and HiFi amplifiers and can be used in any EL84 or 6BQ5 position.
Starting at $30.95 Vacuum Tube - 0B2, Voltage Regulator, Diode, Glow-Discharge The 0B2 is a two-electrode, inert-gas-filled cold cathode miniature tube intended for use as a voltage regulator.$5.90
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