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.
T-4-125A_4D21 Vacuum Tube - 4-125A / 4D21, Tetrode, Power Amplifier
The 4D21 / 4-125A is a four-electrode tube designed for use as a power amplifier and oscillator. The anode is capable of dissipating 125 watts, and cooling is accomplished by radiation.
$139.90
T-4D32 Vacuum Tube - 4D32, Tetrode, Beam Power
Beam type aligned grid power amplifier. It has a unipotential oxide-coated cathode, a hard glass nonex bulb, and a glass base with short tungsten leads. The tube has a heater designed to operate from a 6.3 volt supply.
$71.95
P-YJR Solid State Rectifier - Yellow Jackets® YJR, For 5AR4, 5U4, 5Y3
The YJR is a direct plug-in replacement adapter for use in most amplifiers that use 5AR4/GZ34, 5U4, 5Y3 or similar full-wave rectifier tubes. The YJR converts your amp's vacuum tube rectifier to a solid state rectifier, reducing tube sag for a tighter sound and feel. The tube rectifier can easily be swapped back in when sag is desired. This Yellow Jacket® is a solid state device and as such does not come with vacuum tubes.
  • Converts most audio amplifiers which use a vacuum tube rectifier 5AR4/GZ34, 5U4 or 5Y3 to a solid state device.
  • Safe for all common amplifiers and transformers.

All Yellow Jackets® have a one year warranty against manufacturer defects.
$14.95
T-SSR01 Solid State Rectifier - For 5AR4, 5U4, 5Y3 Tubes
Solid State Rectifier Direct plug-in replacement for 5AR4, 5U4 and 5Y3 rectifier vacuum tubes in amplifiers with center tapped secondary power transformer. Use when less 'sag' is desired in the power supply; just switch back to the tube rectifier when 'sag' is desired.
$9.95
T-5AR4-C Vacuum Tube - 5AR4, Ruby Tubes
5AR4 Ruby, Rectifier Tube
$21.95
T-5AR4-CHINA Vacuum Tube - 5AR4, Chinese
Chinese 5AR4 Vacuum Tube
$18.54
T-5AR4-GEN Vacuum Tube - 5AR4/GZ34/U77, Genalex Gold Lion
Genalex Gold Lion U77 / GZ34 full-wave rectifier tube. Made in Russia.
$38.95
T-5AR4-JJ Vacuum Tube - 5AR4/GZ34, JJ Electronics
The JJ Electronic GZ34 / 5AR4 is rugged rectifier at a reasonable price. JJ has a reputation for building sturdy tubes and this one is no exception. Users report that the JJ GZ34 / 5AR4 is a reliable rectifier in their Vox, Fender, and hifi amplifiers.
$15.95
T-5AR4-SOVT Vacuum Tube - 5AR4, Sovtek
Octal rectifier tube (Max DC output current = 250 mA)
$21.75
T-5AR4-STR-TAD Vacuum Tube - 5AR4 STR, Tube Amp Doctor
Tube Amp Doctor 5AR4 Rectifier, Premium Selected. A faithful reproduction of the Mullard/VALVO GZ34. Pure power and the typical sag is the distinguishing characteristic of the most popular guitar amps of the 1960s guitar heroes till today.
$22.95
T-5AR4-TUNG Vacuum Tube - 5AR4, Tung-Sol Reissue
Tung Sol 5AR4 rectifier tube. Made in Russia.
$34.50
T-5AR4_GZ34 Vacuum Tube - 5AR4 / GZ34, Rectifier, Full Wave
Heater-cathode twin diode designed for full-wave rectifier operation. High output current and small size make this tube especially suitable for compact amplifier designs.
Starting at $52.90
Partially Out of Stock
T-5AU4_5V3A Vacuum Tube - 5AU4 / 5V3A, Rectifier, Full Wave
Filamentary full-wave high-vacuum rectifier designed for use in the power supply of television receivers and other equipments which have high output current requirements.
$14.95
T-5AW4 Vacuum Tube - 5AW4, Rectifier, Full Wave
High-vacuum rectifier intended for use as a full-power rectifier in television receivers.
$8.90
T-5AZ4 Vacuum Tube - 5AZ4, Rectifier, Full Wave
Filament-type high-vacuum full-wave rectifier designed for service in power supplies of moderate current requirements. The electrical characteristics of the 5AZ4 are equivalent to those of the 5Y3GT.
$6.90
Out of Stock
T-5R4GA Vacuum Tube - 5R4GA, Rectifier, Full Wave
New-Old-Stock (NOS) tube
5R4GA - Rectifier, Full Wave
$17.90
T-5R4GB Vacuum Tube - 5R4GB, Rectifier, Full Wave
Glass octal type for industrial and military applications.
$19.90
Out of Stock
T-5R4GY-A-B Vacuum Tube - 5R4GY-A-B, Rectifier, Full Wave
The 5R4GY is designed for rectifier use in equipment requiring a high peak inverse voltage rating. Satisfactory operation of this tube type under conditions falling within area 1 on curve no 1 may be obtained without filament preheating.
$24.90
T-5R4WGA-B-Y Vacuum Tube - 5R4WGA-B-Y, Rectifier, Full Wave
Long life, ruggedized, reliable full wave rectifier tube.
$11.95
T-5T4 Vacuum Tube - 5T4, Rectifier, Full Wave
The 5T4 is designed for service as a power rectifier in AC operated receivers.
$19.95
T-5U4GB-EH Vacuum Tube - 5U4GB, Electro-Harmonix
Electro-Harmonix 5U4GB Vacuum Tube
Straight bottle full-wave rectifier.
$15.40
T-5U4GB-JJ Vacuum Tube - 5U4GB, JJ Electronics
The JJ Electronic 5U4GB is an excellent choice for an economically priced tube rectifier. Used in many Hi-Fi and guitar amplifiers, JJ delivers a robust and solidly built tube. This full wave rectifier will work in any 5U4 application.
$14.95
T-5U4GB_5AS4A Vacuum Tube - 5U4GB / 5AS4A, Rectifier, Full Wave
Filamentary twin diode designed for use as a full-wave rectifier in the power supply of television receivers or other equipment which has high direct-current requirements. The 5U4GB may be used a replacement for either the 5U4G or the 5U4GA.
$44.90
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