CED Tube Amp Doctor T 12AX7 RB TAD Vacuum Tube 12AX7 / ECC83 Redbase Tube Amp Doctor Premium Selected P15414769CED-T-12AX7-RB-TAD https://cdnimages.opentip.com/full/CED/CED-T-12AX7-RB-TAD.jpg Tube Amp Doctor T 12AX7 RB TAD Vacuum Tube 12AX7 / ECC83 Redbase Tube Amp Doctor Premium Selected Manufacturer Part Number: T-12AX7-RB-TADThe all-new designed TAD 12AX7 / ECC83 Redbase is a miniature, high-mu twin triode with very good gain. These tubes are selected and recommended for guitar amps to improve overall responsiveness and dynamics. Because of its cathode-to-heater voltage-withstand capability, this tube works perfectly as a cathode follower.Best for thick, clean tones as well as for those modern preamps where a deep low end is required as well as for sounds requiring fat midrange, detailed airy top end and lots of power from the preamp.Recommended for all positions in medium gain amps or for V2+ positions in high-gain amps. For V1 in general but especially for high-gain amps or phono/audio-amps, we recommend the new 7025 / E83CC Redbase Highgrade . The TAD 12AX7 / ECC83 Redbase can replace any 7025, 12AX7WA, 12AX7WB, 12AX7LPS, 12AX7EH, ECC83 or E83CC.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 TestMicrophonic TestGain TestSonic TestsShock TestsListening TestsBalanced Output TestMeasurements and SpecsApproximate net weight12 g BaseE9-1, Small Button 9 Pin Cathode-to-heater potential, max.170 V Cathode Current8 mA Coolingconventional Diameter22.5 mm Direct interelectrode capacitances, max. Grid to cathode1.9 pF Direct interelectrode capacitances, max. Grid to heater0.3 pF Direct interelectrode capacitances, max. Grid to plate1.8 pF Direct interelectrode capacitances, max. Plate to cathode0.5 pF Heater Current Parallel0.35 Heater Current Series Current0.18 Heater Voltage Parallel (AC or DC)6.3+/-0.5 Heater Voltage Series (AC or DC)12.6V +/-1.0 Height56 mm Max. Bulb temperature (surface hottest point)165°C Max. DC plate voltage330 V Max. Negative DC Grid Voltage-55 V Max. Plate dissipation1.2 W Max. Positive DC Grid Voltage0 V Operating PositionAny Rg-k max.2.2M? Seated height49 mm Packaging InformationPackaging Dimensions3.25 in. × 1 in. × 1 in. Weight (Packaging)0.038 lbs. Files DatasheetAll Models 15414769 0.0400lbs 0.00 0.00 0.00

Tube Amp Doctor

36.1800 2025-07-17 In Stock Tube Amp Doctor T 12AX7 RB TAD Vacuum Tube 12AX7 / ECC83 Redbase Tube Amp Doctor Premium Selected

Tube Amp Doctor T-12AX7-RB-TAD Vacuum Tube - 12AX7 / ECC83, Redbase, Tube Amp Doctor, Premium Selected

Brand Tube Amp Doctor

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Product Description

Manufacturer Part Number: T-12AX7-RB-TAD

The all-new designed TAD 12AX7 / ECC83 Redbase is a miniature, high-mu twin triode with very good gain. These tubes are selected and recommended for guitar amps to improve overall responsiveness and dynamics. Because of its cathode-to-heater voltage-withstand capability, this tube works perfectly as a cathode follower.

Best for thick, clean tones as well as for those modern preamps where a deep low end is required as well as for sounds requiring fat midrange, detailed airy top end and lots of power from the preamp.

Recommended for all positions in medium gain amps or for V2+ positions in high-gain amps. For V1 in general but especially for high-gain amps or phono/audio-amps, we recommend the new 7025 / E83CC Redbase Highgrade . The TAD 12AX7 / ECC83 Redbase can replace any 7025, 12AX7WA, 12AX7WB, 12AX7LPS, 12AX7EH, ECC83 or E83CC.

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

Measurements and Specs

Approximate net weight

12 g

Base

E9-1, Small Button 9 Pin

Cathode-to-heater potential, max.

170 V

Cathode Current

8 mA

Cooling

conventional

Diameter

22.5 mm

Direct interelectrode capacitances, max. Grid to cathode

1.9 pF

Direct interelectrode capacitances, max. Grid to heater

0.3 pF

Direct interelectrode capacitances, max. Grid to plate

1.8 pF

Direct interelectrode capacitances, max. Plate to cathode

0.5 pF

Heater Current Parallel

0.35

Heater Current Series Current

0.18

Heater Voltage Parallel (AC or DC)

6.3+/-0.5

Heater Voltage Series (AC or DC)

12.6V +/-1.0

Height

56 mm

Max. Bulb temperature (surface hottest point)

165°C

Max. DC plate voltage

330 V

Max. Negative DC Grid Voltage

-55 V

Max. Plate dissipation

1.2 W

Max. Positive DC Grid Voltage

0 V

Operating Position

Any

Rg-k max.

2.2M?

Seated height

49 mm

Packaging Information

Packaging Dimensions

3.25 in. × 1 in. × 1 in.

Weight (Packaging)

0.038 lbs.

Files

Datasheet

All Models

Attention CA Residents: Prop 65 Warning

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.

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