TT E83CC (12AX7 / ECC83 / 7025) - V1

• Tube-Town Prototyping Board
• Size: 105 x 50 mm
• Material: 1,5 mm FR4 red

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

Silicon Wire 0,5 mm²

• 1m black
• 1m red
• 1m yellow
• 1m green
• 1m blue
• Operation Voltage Uo/U: 300 / 300 V AC
• Test Voltage: 2000 V
• Operating temperatures: –50 bis +180 °C

Silicon Wire 0,25 mm²

• 1m black
• 1m red
• 1m yellow
• Operation Voltage Uo/U: 300 / 300 V AC
• Test Voltage: 2000 V
• Operating temperatures: –50 bis +180 °C

 

• Insulation: Silicon
• Operation Voltage: 300 V AC / 500 V DC
• Test Voltage: 2000 V
• Operating temperatures:  –50 bis +180 °C
• Packing: 5 m
• Cross-Section: 1,5 mm²
• Outer Diameter: 2,8 mm
• Stranded wire structure: 30 x 0,25 mm tinned copper

• Type: Tubular Metalized Polyester Film Capacitors
• Voltage Rating: 630 V
• Tolerance: +/- 10%
• Operating Temperature Range: - 40°C / + 85 °C
• Termination Style: axial
• • Non-inductive
  • Self healing windings.
  • Similar to the Mallorys 150-Series

Miniature Signal Relays

• Dimensions: 20.2 x 9.8 x 12.5 mm
• Function: 2 x changeover contacts, DPDT
• Nominal voltage: 12 V/DC
• Nominal load: 1 A - 24 V/DC, 0.5 A - 120 V/AC
• Max. switching voltage: 60 V/DC / 120 V/AC

Files:

• Datasheet

Resistor, Metal Oxide 5 Watt

• +/- 5% tolerance
• -55° C to 240° C operating range
• max 500 V
• Excellent flame retardant coating
• Small Size

Fuse, US-Size, slow blow

• Rated Voltage: 250 VAC
• Contact caps: nickel-plated brass
• Size: Ø 6,3 mm x 32 mm
• Pack of 10

• Rated Voltage: 250 VAC
• Contact caps: nickel-plated brass
• Size: Ø 6,3 mm x 32 mm
• Pack of 10

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
Balanced gain on both systems

Very linear working 12AX7 / ECC83 with long anode plates and spiral heating, which makes the tube less sensitive to interference from AC heating.
We recommend this tube for audio and high-end amps as well as for "modern" Fender amps with more overdrive, but also as an input tube in old Marshall JCM800s.

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.