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Vacuum Tube - 12AX7LPS, Sovtek

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SKU:	T-12AX7LPS-SOVT
Item ID:	004459

Price: $14^.50

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Type

Preamplifier

9 pin miniature preamp tube (Amplification Factor = 100). This Russian tube is full bodied and well balanced. It has a high gain with a very smooth presentation. In overdrive, it is not quite as defined as the 12AX7-S-JJ, but it offers more crunchy fizz. For more information about our 12AX7 tubes, see our tech corner article on 12AX7s.

UPC/EAN: 683274021287

RoHS Compliant

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Specifications, Files, and Documents

Specification Sheet

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Product Measurements (click to expand)

Product Measurements
Amplification Factor		94
Capacitance, Cathode to Heater		5.0 nF
Capacitance, Grid to Cathode		1.6 pF
Capacitance, Grid to Heater		1.6 pF
Capacitance, Plate to Cathode		0.46 pF
Capacitance, Plate to Heater		0.46 pF
Capacitance, Plate to Plate		600 pF
Capacitance, grid to plate		1.7 pF
Grid Circuit Resistance (R_g), Fixed Bias		1 MΩ
Grid Circuit Resistance (R_g), Self Bias		2.2 MΩ
Grid Reverse Current		0.2 μA
Heater Voltage		6.0 - 6.6 V / 12.0 - 13.2 V
Heater to Cathode Voltage		200 V
Plate Current (I_a)		8 mA
Plate Dissipation (W_a)		1.2 W
Plate Resistance (R_a)		56 kΩ
Plate Voltage (U_a)		330 V
Transconductance (S)		1.7 mA/V

Packaging Information
Packaging Dimensions		1 in. × 1 in. × 3 in.
Weight (Packaging)		0.037 lbs.

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Product Reviews

5.00 out of 5 based on 3 reviews

5 out of 5

THE phase inverter tube in my opinion. I stock them. I've used dozens, in new builds, upgrades and repairs. Also can provide a nice warm tone in the V1 spot in a head cab ONLY. Speaker/cabinet/chassis vibrations can harm this long-plate tube, according to some.

prefsnider - January 22nd, 2018

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5 out of 5

These are great and reliable tubes for phono sections of stereo preamps. They have very long life way over 6000 hours. The EH short plate version is quieter but not as warm sounding. Those will last a long time too. Highly recommend the Sovtek 12AX7LPS +++++

Triodeotl - October 17th, 2015

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5 out of 5

I can't attest to this tube's value in any place but the driver stage, but in that position there is no other tube I would even consider. The best.

Screech - July 27th, 2014

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Questions and Answers

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How would these sound in my vox vt20x? 1 answers

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Asked by Anonymous on March 9th, 2017.

Answers (1)

Matt H.

Staff Member

March 9th, 2017

These tubes have a balanced eq and are nice and smooth.

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