# 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 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 - EL84/6BQ5, Telefunken, Pentode, Power
Telefunken, Pentode, Power
$199.90 Out of Stock Vacuum Tube - EL509, JJ Electronics Package of 2 The JJ Electronic EL509S is an eight pin octal based version of the EL509 / EL519. This modified version does not have the top plate cap which is instead wired to a pin on the octal base. This tube is rated for 700V and 42 Watts plate dissipation. The JJ EL509 is popularly used in output transformerless OTL amplifiers. Starting at$38.95
Vacuum Tube - EL844, JJ Electronics
The JJ Electronic EL844 is a variation on the classic tube which reduces the overall headroom by 25%. With the reduced power, hitting that rich distortion that the EL84 is notorious for is more manageable. This tube will hit full saturated power tube sounds without having to crank the amps volume as high which makes them a great choice for recording as well as home / bedroom use.
Starting at $12.50 Vacuum Tube - GZ34/5AR4, Mullard Mullard Reissue GZ34 (5AR4). Current production, made in Russia. This is a copy of the most popular rectifier valve ever built by Mullard. It has a low internal voltage drop and a controlled heater warm up time which helps extend the life of the other valves in the amplifier by allowing them to heat up before plate voltage is applied.$38.95
Vacuum Tube - KT66, Genalex Gold Lion
Genalex Gold Lion KT66 power tube. Made in Russia.
Exact copy of the original clear glass KT66. The tube that created “The Bluesbreaker Tone.” used in 50’s-60’s hi-fi favorites such as the Heathkit W-5M and many Leak amplifiers.
Starting at $37.95 Save 7% Originally:$40.95
Vacuum Tube - KT66, JJ Electronics
A sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT66 delivers a powerful 25 Watts with plenty of headroom. This tube has a tone that is warm, thick, and straightforward. With a more balanced sound than the 6L6GC, the JJ KT66 is an excellent choice for a full bodied tone.
Starting at $39.95 Vacuum Tube - KT66, Tube Amp Doctor, Premium Selected The Tube Amp Doctor KT-66 is an incredible remake of the classic British tube. With its large glass envelope contoured by smooth curves tapering into a rounded brown base, the TAD KT-66 not only looks like the original, it performs like the original. This KT66 offers plenty of headroom for a thick full bodied sound with smooth yet articulate highs. The KT-66 is famously used in vintage British plexi amps and makes a great replacement for that style of amplifier and many others. The TAD KT66 is matched for both plate current and transconductance and passes all of the tests of the TAD Premium Selection process. The TAD KT-66 can be used in any KT-66 position as well as 6L6GC and 5881 amps that can supply the required 1.27A for the heater. Starting at$27.95
Vacuum Tube - KT66, Tung-Sol Reissue
The Bluesbreaker sound is back, woman tone at its finest! Made in Saratov, Russia
Starting at $35.95 Vacuum Tube - KT66, Valve Art Octal power tube (Max Plate Watts = 25W) Starting at$38.44
Vacuum Tube - KT77, Genalex Gold Lion
Genalex Gold Lion KT77 beam-power tetrode tube. Made in Russia.
A beam tetrode with an absolute maximum anode dissipation rating of 32 watts. The KT77 is designed for use in the output stage of an af amplifier. Two valves in Class AB1 give a continuous output of over 70 W.
Starting at $42.95 Save 12% Originally:$48.95
Vacuum Tube - KT77, JJ Electronics
A reproduction of the original tubes that captures the sound that made the KT77 famous. In their typical fashion, JJ has built this tube in a solid construction that is robust and highly reliable. This tube has more headroom than a typical EL34. This is an excellent tube for adding more power to the sound of an EL34 amp.
Starting at $19.95 Vacuum Tube - KT88, JJ Electronics, Blue Glass Blue glass envelope. A sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT88 delivers a powerful 42 Watts with plenty of headroom to spare. This tube has a tone that is warm and lively with a detailed and balance response. Starting at$44.95
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 $34.95 Vacuum Tube - KT88, Genalex Gold Lion KT88 power tube reissue of Genalex Gold Lion. Made in Russia. In 1957 Marconi-Osram Valve Co. (Genalex) introduced the "King of Power Tubes", the legendary Gold Lion KT88. This tube became the heart and soul of such classics as the Dynaco Mark III, McIntosh MC275, and Marshall Major. Unfortunately, Genalex ceased tube production in the early 1980s and the Genalex Gold Lion KT88 has become very expensive and hard to find. After extensive research and engineering, New Sensor Corp. has reissued the famed Genalex Gold Lion KT88. Starting at$55.95
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Originally: $58.50 Vacuum Tube - KT88, JJ Electronics A sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT88 delivers a powerful 42 Watts with plenty of headroom to spare. This tube has a tone that is warm and lively with a detailed and balance response. The JJ KT88 is an excellent choice for Hi-Fi stereo equipment as well as guitar amplifiers. It can be used in place of 6550 tubes. Starting at$39.95
Vacuum Tube - KT88, Mullard
Mullard KT88 power tube. Made in Russia.
This is an exact copy of the KT88 valves that were manufactured by Marconi-Osram for Marshall in the late 1960s and 1970s. Excellent replacement output valve for the Marshall Major to retain the original sound.
Starting at $43.95 Vacuum Tube - KT88-STR, Tube Amp Doctor, Premium Selected The Tube Amp Doctor KT88-STR is build just like the original tube with its thick curved glass envelope and metal base. The similarities don’t stop with its attractive appearance. This KT88 offers a lively and dynamic tone that is ideal in both HiFi audio amplifiers and high wattage guitar / bass amps. The sound of the TAD KT88 is pleasantly warm at all frequencies with detailed mids, articulate and nuanced highs, and harmonically rich and natural lows. The linear response is excellent. The TAD KT88-STR is matched for both plate current and transconductance and passes all of the tests of the TAD Premium Selection process. Starting at$49.25
Vacuum Tube - KT88, Valve Art
Octal power tube (Max Plate Watts = 42W).
Starting at $40.92 Vacuum Tube - KT90, Electro-Harmonix Electro-Harmonix KT90 power tube. Made in Russia. Absolutely the best KT90 ever developed. Wafer base height of 0.34”. Starting at$42.95
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Originally: $47.95 Vacuum Tube - KT120, Tung-Sol Reissue Tung Sol KT120 power pentode tube. Made in Russia. In September of 1950 Tung-Sol introduced the 5881, an uprated and industrial version of the 6L6GA with a 23.5 watt plate dissipation, opening the doors to the hi-fi movement of the 1950s. This rugged tube also found a home in the '59 Fender Bassman and servo amplifiers used in B-52 bombers. In 1955 Tung-Sol raised the bar of high fidelity with the introduction of the 35 watt 6550, which could deliver 100 watts with a pair in push-pull configuration. This tube was used in the Dynaco Mark III and Sunn amplifers. Starting at$47.95
Vacuum Tube - PX300B, Genalex Gold Lion, Gold Pin
Genalex Gold Lion PX300B power triode tube with gold pins. Made in Russia. In Europe during the 1930s the GEC (Genalex)/Marconi-Osram PX4 and PX25 power triodes were considered the finest audio triodes of their day. In keeping with the tradition of Genalex to provide the highest quality tubes, New Sensor has released the Genalex Gold Lion PX300B audio power triode. This tube is the highest quality 300B type available and is considered to be an upgrade in any 300B amplifier.
Starting at $143.95 Vacuum Tube - X201A, Triode, Globe, Long Pin Triode, Globe, Long Pin$54.10
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