High Power Resistor 3R9 (4 Ohm) / 150 Watt

• Rated Voltage: 250 VAC
• Contact caps: nickel-plated brass
• Size: Ø 5 mm x 20 mm
• Pack of 10

Variable voltage control for voltages up to 600 V

Possible applications:
- G2 Control
- Power adjustment

Please see the >>TT VoCoM Projekt-Seite zu finden.

Der Bausatz beinhaltet alle Teile die zum Bau benötigt werden wie Widerstände, Dioden, Leistungstransistor, Kühlkörper, Potentiometer, Schraube, Mutter, Leitung, Beschriftungsschild.

ACHTUNG HOCHSPANNUNG:
Dieser Bausatz ist nichts für Anfänger. Wer nicht weis, was er damit tut, sollte diesen Bausatz auch nicht kaufen !

">>TT VoCoM project page for more infos

Kit includes:
all parts to build this VVC. Resistors, Heatsink, Wires, Potentiometer, PCB, Label, Screws, Nuts.

WARNING: HIGH VOLTAGE !!
This kit is not for beginners. If you do not know what you are doing than you should NOT buy this kit!

Carbon Composition Resistors

• Specification: ½ Watt, axial
• Temperature Range: -55°C to +125°C
• Tolerance: 10%
• Max. Operating Voltage: 350 V
• Size: l=9.5 mm, d=3.6 mm

• MPW axial leaded metallized polypropylene film capacitors
• Self Healing
• Low ESR
• Tolerance: +10% @ 1 kHz, 25°C
• Peak, AC voltage (50/60 Hz): 630VDC / 250 VAC
• Size: Ø 10,5 x 29 mm
• Dielectric: Polypropylene
• Coating: Flame Retardant Polyester tape wrap (UL510) with epoxy end fill (UL94V0)

with step-on proof, flexible in insulating sleeve.

• Connection Type: solder connection
• Wire Diameter: up to 2,5 mm2
• Plug Diameter: 4 mm
• Contact materal: nickel-plated brass
• Rated voltage: 60 VDC
• Rated current: max. 30 A
• Contact resistance: 3.0 mOhm

Hint: to assemble the connector please pull the metal part out of the plastic part !

with step-on proof, flexible in insulating sleeve.

• Connection Type: solder connection
• Wire Diameter: up to 2,5 mm2
• Plug Diameter: 4 mm
• Contact materal: nickel-plated brass
• Rated voltage: 60 VDC
• Rated current: max. 30 A
• Contact resistance: 3.0 mOhm

Hint: to assemble the connector please pull the metal part out of the plastic part !

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 22 µF
• Voltage Rating: 350 V
• Tolerance: +/- 20%
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 12 mm x 30 mm
• Termination Style: axial

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

Sonically similar to the "normal" JJ 12AX7, but the overall sound is "fuller" and "stronger" with a more powerful bass. Visually, compared to the normal JJ 12AX7, the long anode plates stand out, as well as a slightly higher current. Suits well in guitar and bass amps, but also in audio and high-end areas.

Note: Tubes equipped with long plates are commonly associated with a "warmer" or "richer" sound, whereas those with shorter plates tend to deliver a "tighter sound". However, tubes featuring long plates exhibit increased sensitivity to vibrations and mechanical disturbances, rendering them less ideal for critical applications.

Files:

• Datasheet

The newest member in the JJ family of ECC83/12AX7 tubes is the JJ ECC83MG. The MG is a 12AX7 with a bit lower amplification than a standard 12AX7. Our measurements show that the difference is small, but the new tube sounds more linear than the standard JJ 12AX7, and in amps produces a milder, gentler sound. The mechanical construction shows that it is not just another minor variation of the normal JJ 12AX7. The new tube has longer plates.
The JJ ECC83MG is interesting for low and medium gain amplifiers, as well as for audio, where a too hot amp needs to be tamed; as well as an alternative to a 12AY7.

Files:

• Datasheet

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

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.