JJ 5AR4 / GZ34

Active, serial FX-Loop for a subsequent installation in an existing tube amplifier
The FX-Loop works with  two LND150 in the send and in the return stage. The send and return level can be adjusted to their optimal value with two potentiometers. The Loop works with the present high voltage of the amplifier.
It has two inputs for low and high signal levels.

Input Levels:
InA: 30 - 60 Vpp, max. 65 Vpp
InB: 10 - 15 Vpp, max. 18 Vpp

The FX-Loop utilize POTENTIALLY FATAL HIGH VOLTAGES.
Seek help from a competent technician if you are in any way unfamiliar with high voltage circuits.
Use at your own risk.

Files:

• Documentation

2 tubes, matched as pair

5881 Tube by JJ

Files:

• Datasheet

TT PX45 - a  PX18 in combination with the powerstage of the JTM45

Set of componentes for building the TT TT PX45 Guitar Amp.
Please visit the >>Project page for more infos about the amp, schematics and layout.

INCLUDED:

• Transformers
  • Power: tt-jtm45-pw
  • Output: tt-otjtm45D, Dual-Primary
• Resistors
• Capacitors
• Jacks
• Light
• Wires
• Board
• Switches
• Tubes (12AX7 / ECC83 and EL34)
• Fuses & Fuesholder

NOT INCLUDED:

• Headshell
• Chassis ch045
• 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 !

• Type: Multisection Capacitor
• Capacitance: 32 + 32 µF
• Voltage Rating: 500 V
• Tolerance: - 10% / +30 %
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 35 mm x 50 mm
• Termination Style: radial, solder lugs

• Type: Electrolytic capacitor
• Capacitance: 330 µF
• Voltage Rating: 63 V
• Tolerance: 20 %
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 15 mm x 35 mm
• Termination Style: axial

Images are for reference only. See Product Specifications

2 tubes, matched as pair

Standard EL34 made by JJ with a smooth and dizzy sound.

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

2 Tubes matched as pair
The JJ 6L6 is very popular because of its warm sound.

Files:

• Datasheet

EH 12AX7 / ECC83

• The 12AX7EH provides high gain with ultra low noise and detailed, musical tone that rivals the most desirable NOS types.

Files:

• Datasheet

TT Selection: Balanced
Both systems with balanced gain

ECC82 / 12AU7 medium gain pre-amplifying double triode.
Provides a very smooth sound with well-defined tones suitable for audio and guitar amplifiers.
 

Files:

• Datasheet