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Tung-Sol KT150 - precision matched

Tung-Sol KT150 - precision matched
Manufacturer: Tung-Sol (reissue)
Tung-Sol KT120These tubes have been burned in, tested at typical operating voltages on a laboratory grade Amplitrex AT1000, and precisely matched for both current draw (mA) and transconductance (Gm). Learn more about our testing and matching process here.

Price is for a single tube and includes burn-in and standard matching service. Tubes ship in Tung-Sol retail boxes.

From the Manufacturer

With the new KT150, Tung-Sol continues to lead in the audio power tube, power game. After the introduction of the highly successful Tung-Sol KT120, Russia's premier vacuum tube inventor, Valery Krivtsov, in collaboration with Irusha Bitukova and a team of ExpoPUL tube designers, set to work in our laboratories to develop an even more powerful audio output tube.

With a massive plate dissipation of 70 watts, the Tung-Sol KT150 is the most powerful octal beam tetrode ever produced. A pair of KT150s can allow an amplifier with a power output approaching 300 watts to be built. 
(View KT150 spec sheet and curves.)
The Tung-Sol KT150 glass envelope is a special egg shaped balloon that was developed to improve thermal dissipation and maintain a superior vacuum for the best sound. The fact that the glass envelope has no flat sides means the Tung-Sol KT150 has no problems with microphonics.

The manufacturers who are developing amplifiers to use this tube have reported that the Tung-Sol KT150 sounds great in all power amplifier configurations including single-ended, triode connected and ultra-linear. The tone signature of the Tung-Sol KT150 is characterized by a strong bass signature with balance and clarity throughout the audio frequency spectrum.

KT150 substitution notes

The KT150 tube is an exciting development in new production vacuum tubes. In many cases, it is a drop in replacement for 6550, KT88, KT90, and KT120 tubes, as long as the larger bottle fits in your chassis. This tube also draws more filament current (100-300 mA more per tube) than 6550/KT88/KT90 tubes do, so you need to be sure your power supply can handle the increased demand.

Please check with your amplifier's manufacturer or contact us if you'd like our help deciding if the KT120 tube is a good fit for you

Precision Power Tube Matching

Our power tubes are burned in and then tested on a laboratory grade Amplitrex AT1000 tube tester. We match tubes for both current draw (mA) and transconductance (Gm) at typical operating conditions (plate: 500V, screen: 300V, grid bias: -30.5V).

After burn in and testing, we hand select and custom match every power tube order we receive. To do this, each power tube set is also run on a custom, fully variable test fixture that can match the operating conditions of your amplifier based on the information you provide below. This enables us to do a final check of the power tube set's performance and matching under load. Why this matters
1. What is the manufacturer and model of your amplifier?
2. How is your amp biased?   Why we ask
3. Matching notes   Why we ask
If you know the plate, screen, and grid bias voltages your amplifier uses, please note them in the comments section when you check out and we will use this information when we select and match your power tube set. (If you don't know, don't worry--we can make an educated guess based on your amp's make and model, if we don't already know the voltages it uses.) If you are a guitarist, you can also specify if you prefer early or late breakup. Thanks!


Price per single tube: $99.00

Enter total number of tubes needed for your matched set

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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.

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