TT kit DC Heater

Set of componentes for building the TT JC18 Guitar Amp.
Please visit the >>Project page for more infos about the amp, schematics and layout.

INCLUDED:

• Powertransformer Tube-Town 18W, 0-120-230-240V @ 50/60 Hz
• Outputtransformer Hammond 1750PA
• Resistors
• Capacitors
• Jacks
• Light
• Wires
• Board
• Switches
• Tubes
• Fuses & Fuesholder

NOT INCLUDED:

• Chassis
• Knobs
• Faceplate

To build this project knowledge in electric engeneering, experience with high voltage, and the reading and understanding of schematics and dealing with measurement device is highly recommended .
There is NO step-by-step guide for beginners. The circuit and layout plan includes all relevant information. If you don't understand it then don't build it.
THIS IS NOT A BEGINNERS PROJECT !

TT Selection: Balanced
Both systems with balanced gain

Warm and balanced overall sound, paired with high resolution and brilliance, which is why the TT12AT7 achieves the best results in both instrumental and audio/high-end amplifiers.

Features:

• Warm and balanced sound
• Excellent sound resolution and brilliance
• Ideal for instrumental and audio/high-end amplifiers

Hint;
Often, 12AU7 and 12AT7 types are used instead of 12AX7 tubes in order to either reduce the overall power of the amplifier or just take back the overdrive of the preamp. Especially the 12AU7 brings a very large tonal difference compared to a 12AX7, which is usually much greater than when switching from a 12AX7 to 5751 or 12AT7.

When using a 12AU7 in a driver stage that is normally designed for 12AX7, the overall power of the power amp is usually reduced. How big this difference is depends on the amplifier or circuit. For example, a Marshall with a 12AX7 in the phase inverter stage set to volume 5 will then reach the same volume with a 12AU7 set to volume 6 (perceived volume, not measured).

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 Voltage (Ug1): -2V (typical)
• Anode Current (Ia): 10mA (typical)
• Anode Power Dissipation: Maximum 2.5W per triode
• Anode Resistance (ra): 11kΩ
• Amplification Factor (μ): 60
• Transconductance (S): 5.5mA/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 either 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 operation.
• Coupling Capacitors: Capacitors with low capacitance (typically 0.1µF) are recommended to minimize high frequency disturbances.

• Insulation: Silicon
• Operation Voltage: 300 V AC / 500 V DC
• Test Voltage: 2000 V
• Operating temperatures:    –40 bis +180 °C
• Packing: 5 m
• Cross-Section: 0,25 mm²
• Outer Diameter: 1.6 mm
• Stranded wire structure: tinned copper

• Insulation: Silicon
• Operation Voltage: 300 V AC / 500 V DC
• Test Voltage: 2000 V
• Operating temperatures:    –40 bis +180 °C
• Packing: 5 m
• Cross-Section: 0,25 mm²
• Outer Diameter: 1.6 mm
• Stranded wire structure: tinned copper

• Insulation: Silicon
• Operation Voltage: 300 V AC / 500 V DC
• Test Voltage: 2000 V
• Operating temperatures:    –40 bis +180 °C
• Packing: 5 m
• Cross-Section: 0,25 mm²
• Outer Diameter: 1.6 mm
• Stranded wire structure: tinned copper

• Insulation: Silicon
• Operation Voltage: 300 V AC / 500 V DC
• Test Voltage: 2000 V
• Operating temperatures:    –40 bis +180 °C
• Packing: 5 m
• Cross-Section: 0,25 mm²
• Outer Diameter: 1.6 mm
• Stranded wire structure: tinned copper

Mica Capacitors

• Voltage Rating:    500 V
• Tolerance: 5%
• Operating Temperature Range: - 50°C / + 150°C
• Termination Style: radial

Metal Oxide Film Resistors

• Termination Style: Axial     
• Power Rating: 5 W     
• Tolerance: 5 %     
• Temperature Coefficient: 350 PPM / C     
• Operating Temperature min/max: - 55 C / + 155 C      
• Voltage Rating: 500 V     
• Diameter: 8,5 mm     
• Length: 25 mm     
• Lead Diameter:  0.75 mm    

Mallory Type 150 is a general purpose capacitor for use in blocking, bypass, decoupling, smoothing and some timing applications.

• Epoxy end fill meets UL94V-0
• Non inductively wound
• Flame retardant outer wrap meets UL510
• Non polar

Specifications:

• Operating Tempeature Range: –55 ºC to +125 ºC (derate linearly to 50% rated voltage at 125 ºC)
• Dielectric Withstand Voltage: .6 x rated voltage for 2 s @ +25 ºC ±5 ºC
• Dissipation Factor (DF): tgd x 10–4 at +25 ºC ±5 ºC
• Insulation Resistance: 10,000 MO x µF, 30,000 MO Min.
• Self Inductance: 1 nH max. per 1 mm lead and body length
• Life Test: 1000 hrs @ 85 ºC 1.25 x Vn
• Damp Heat Test: 95% RH @ +45 ºC for 21 days
• Soldering: 260 ºC ±5 ºC for 10 s ±1 s
• Long Term Storage Stability: ?C/C = ±3% after 2 years

Color can differ from the picture.

• Resistance: 50k Ohm
• Power: 0,25 W
• Max Voltage: 250 V
• Grid 12,5/10 mm
• Ø: 15,0 mm
• h: 7,0 mm

• Resistance: 25k Ohm
• Power: 0,25 W
• Max Voltage: 250 V
• Grid 12,5/10 mm
• Ø: 15,0 mm
• h: 7,0 mm

• Resistance: 10k Ohm
• Power: 0,25 W
• Max Voltage: 250 V
• Grid 12,5/10 mm
• Ø: 15,0 mm
• h: 7,0 mm

Mica Capacitors

• Voltage Rating:    500 V
• Tolerance: 5%
• Operating Temperature Range: - 50°C / + 150°C
• Termination Style: radial

Mallory Type 150 is a general purpose capacitor for use in blocking, bypass, decoupling, smoothing and some timing applications.

• Epoxy end fill meets UL94V-0
• Non inductively wound
• Flame retardant outer wrap meets UL510
• Non polar

Specifications:

• Operating Tempeature Range: –55 ºC to +125 ºC (derate linearly to 50% rated voltage at 125 ºC)
• Dielectric Withstand Voltage: .6 x rated voltage for 2 s @ +25 ºC ±5 ºC
• Dissipation Factor (DF): tgd x 10–4 at +25 ºC ±5 ºC
• Insulation Resistance: 10,000 MO x µF, 30,000 MO Min.
• Self Inductance: 1 nH max. per 1 mm lead and body length
• Life Test: 1000 hrs @ 85 ºC 1.25 x Vn
• Damp Heat Test: 95% RH @ +45 ºC for 21 days
• Soldering: 260 ºC ±5 ºC for 10 s ±1 s
• Long Term Storage Stability: ?C/C = ±3% after 2 years