Vacuum Tube - 7025, Tube Amp Doctor, High Grade

Tube Amp Doctor (TAD)
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Vacuum Tube - 7025, Tube Amp Doctor, High Grade

In stock

Warm, clean tone with creamy overdrive!

PREMIUM selected quality for the most demanding amp stages. This tube works greatly for warm clean tones and creamy overdrive. We recommend this tube for the 1st gain stage and as input tube. It upgrades 12AX7A and ECC83 tubes and replaces E83CC tubes.

The HIGHGRADE Selection is the tip-of-the-top quality at the lowest noise (microphony, hum, hiss) level. Typically only 0.5-2% out of the whole production of this tube meet the HIGHGRADE requirements.

The TAD 7025 Highgrade can replace any ECC83, E83CC, 12AX7, 12AX7A, 12AX7M, 12AX7WA/WB/WC/LPS/EH, 5751 or 7025.

Q: When does a preamp tube become a Premium Selected tube?

A: All preamp tubes labeled Premium Selected have passed the following tests:
- Low Noise Test
- Microphonic Test
- Gain Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Balanced Output Test

RoHS Compliant
Item ID:
Tube Amp Doctor (TAD)
Product Measurements
Body Height59 mm
Bulb Temperature160°C
Cathode Current (Ik)8 mA
Cathode to Heater Voltage≤ 150 V
D.C. Grid Voltage, negative-55 V
D.C. Grid Voltage, positive0 V
D.C. Plate Voltage330 V
Grid to Cathode Capacitance (cg/k)1.7 pF
Grid to Heater Capacitance (cg/h)0.2 pF
Grid to Plate Capacitance (ca/g)1.5 pF
Heater Current0.15 / 0.3 A
Heater Voltage6.3 / 12.6 V
Item Diameter22.5 mm
Item Height56 mm
Plate Dissipation (Wa)1.2 W
Plate to Cathode Capacitance0.3 pF
Packaging Information
Packaging Dimensions3.25 in. × 1 in. × 1 in.
Weight (Packaging)0.038 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet264.36 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on March 1st, 2019.
March 1st, 2019
Staff Member
These tubes are tested by the manufacturer and the test results are not specified by the manufacturer when sent to us as stock.

Product Reviews

5.00 out of 5 based on 3 reviews
- January 3rd, 2020
5 out of 5

Excellent tube , I'm using it in a Marshall AVT 150 , which is not known for impressive overdrive , but with this tube it greatly improves the clean and overdrive channels , also if you put a tube screamer in front of the amp , you get very satisfying overdrive on low or increased gain . and of course the AVT 150 will crank out 150 watts ,
This is my new go to tube for the Marshall AVT 150H , it takes the place of a regular 12AX7.

- October 5th, 2019
5 out of 5

The hand selected low noise 7025 is worth every extra penny. This is all that I purchase for my customer's preamp stages.

- April 1st, 2019
5 out of 5

These 7025’s offer the best balance of break-up and headroom. They can get aggressive if pushed or clean up if dialed back. Best tubes I’ve ever played.

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