Alpha Footswitch DPDT momentary, ON-(ON)

2 Tubes, matched as Pair

The high-quality TTEL84/6BQ5 tube with 12 watts of power is perfect for guitar, bass, and audio amplifiers. Inspired by classic NOS EL84 models, this tube is manufactured using modern production methods to ensure consistent high quality.

It offers an ideal combination of sound and reliability and is a direct replacement for all EL84 or 6BQ5 tubes.

Specifications

Electrical Specifications

• Type: Pentode
• Base: Noval (B9A)
• Heater Voltage: 6.3 V (min 5.8 V / max 7.7 V)
• Heater Current: approx. 0.76 A
• Anode Dissipation: 12 W
• Screen Grid Dissipation: 2 W

Operating Conditions

• Anode Voltage (Va): max. 300 V
• Screen Grid Voltage (Vg2): max. 300 V
• Grid Bias Voltage (Vg1): -7.3 V (typical for Class-A operation)
• Anode Current (Ia): 48 mA (at -7.3 V grid bias)
• Screen Grid Current (Ig2): 5 mA

Characteristic Curves

• Amplification Factor (μ): approx. 20
• Internal Resistance (Ra): approx. 38 kΩ
• Transconductance (S): 11 mA/V

Mechanical Specifications

• Length: approx. 70 mm (without pins)
• Diameter: approx. 22.5 mm
• Weight: approx. 25 g

Typical Applications

• Class-A Amplifier: 5.7 W output power at 250 V Anode voltage, 48 mA Anode current
• Class-AB Amplifier: 17 W output power at 300 V Anode voltage, 48 mA Anode current per tube (Push-Pull configuration)

Pinout

1. g1 (Control Grid)
2. k, g3 (Cathode, Screen Grid)
3. h (Heater)
4. h (Heater)
5. a (Anode)
6. • (no connection)
7. • (no connection)
8. g2 (Screen Grid)
9. g3 (Screen Grid)

Usage Notes

• Operating Temperature: Should be operated in a well-ventilated enclosure to prevent overheating.
• Interchangeability: EL84 can be replaced by the Russian 6П14П or American 7189, taking into account different specifications.

• Type: Electrolytic can capacitor
• Capacitance: 10 µF
• Voltage Rating: 63 V
• Tolerance: - 20 % / +20 %
• Operating Temperature Range: - 40°C / + 105 °C
• Dimensions: Ø 5 mm x 11 mm
• Termination Style: radial
• Grid: 2

Images are for reference only. See Product Specifications

• Type: Electrolytic can capacitor
• Capacitance: 4.7 µF
• Voltage Rating: 63 V
• Tolerance: - 20 % / +20 %
• Operating Temperature Range: - 40°C / + 105 °C
• Dimensions: Ø 5 mm x 11 mm
• Termination Style: radial
• Grid: 2

Images are for reference only. See Product Specifications

for Fender Pilot-Light

• BA9s
• #47
• 6,3 V

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

Sweet and warm sounding preamp tube with high gain. We recommend this tube for guitar/bass amps.

Files:

• Datasheet

Sweet and warm sounding preamp tube with high gain. We recommend this tube for guitar/bass amps.

Files:

• Datasheet

4 tubes, matched as quad

EL34 II has fuller low mids and low end but does not lose headroom in the high end. Stronger than regular JJ EL34 but not as aggressive as the JJ E34L.

Typical Characteristics

• Ua = 250 V
• Ug3 = 0 V
• Ug2 = 265 V
• Ug1 = -13,5 V
• Ia = 100 mA
• Ig2 = 14,9 mA
• S = 11 mA/V
• Ri = 15 kΩ
• μg2/g1 = 11

Limiting Values

• Ua0 = 2000 V
• Ua = 800 V
• Wa(max) = 25 W
• Ug20 = 800 V
• Ug2 = 450 V
• Wg2(max) = 8 W
• Ik = 150 mA
• Uk/f = 100 V
• Rk/f = 20 kΩ

Files:

• Datasheet

Tube-Town 12AX7 / ECC83 Preamp-Tube

The TT12AX7 impresses with its fine and detailed reproduction of the highs, which is maintained even at high amplification levels. Due to a higher H3 part, the TT12AX7 sounds significantly cleaner than many other 12AX7/ECC83 tubes, which makes the bass range appear much tighter. We therefore especially recommend this tube for styles such as clean, crunch, and metal, where high amplification and clear transparency are required.

Electrical Characteristics

• Heater voltage (Uf): 6.3V or 12.6V
• Heater current (If): 300mA at 6.3V, 150mA at 12.6V
• Anode voltage (Ua): Maximum 300V
• Grid voltages (Ug1): -2V (typical)
• Grid voltages: -50V to 0V
• Anode current (Ia): 1.2mA (typical)
• Anode power dissipation: Maximum 1W per triode
• Anode resistance (ra): 62.5kΩ
• Amplification factor (μ): 100
• Transconductance (S): 1.6mA/V
• Input capacitance (Cin): 1.6pF
• Output capacitance (Cout): 1.6pF

Mechanical Characteristics

• Socket: B9A (Noval)
• Number of pins: 9

Pin Configuration

• 1 Anode (Triode 1)
• 2 Grid (Triode 1)
• 3 Cathode (Triode 1)
• 4 Heater (f)
• 5 Heater (f)
• 6 Anode (Triode 2)
• 7 Grid (Triode 2)
• 8 Cathode (Triode 2)
• 9 Center Heater (f)

Application Notes

• Heater operation: The tube can be operated with 6.3V or 12.6V, depending on the circuit design.
• Grid resistors: It is recommended to use grid resistors of at least 1MΩ to ensure stable functionality.
• Coupling capacitors: Capacitors with low capacitance (typically 0.1µF) are recommended to minimize high-frequency interference.

for Fender Pilot-Light

• BA9s
• #47
• 6,3 V
• LED
• white

4 Tubes matched as quad
Superior high-voltage Power Pentode with traditional brown base. Faithful re-issue of the original Russian EL34. Preferred by many guitarist for its brighter sound with more mid-punch. Also in demand by Hifi enthusiasts.
Reissue Made in Russia

Files:

• Datasheet