Alpha Potentiometer 250 kOhm log / 16 mm

• Type: Panel Mount Potentiometer - Push / Pull
• Power Rating: 0,125 W log / 0,2 W linear
• Voltage Rating: 150 V DC Audio / 200 V DC linear
• Tolerance: 20%
• Shaft: 6,35 mm, Solid Shaft
• Shaft length: 15 mm
• Drill Ø: M7 (6,8 mm)
• Termination: Solder Lugs
• Dimension: 16 mm
• Switch: DPDT

Kit of an active, serial tube-driven FX-Loop (with parallel option) for a subsequent installation in an existing tube amplifier
The FX-Loop works with one 6112 miniature tube 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

Heater:
6,3 V @ 300 mA

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
• Documentation - OLD

This is a kit of the famous Dumbleator, can be used as standalone device or for installation in an existing amplifier.

When build as a stand-alone device, the kit can be powered with the TT-VPump, in an amplifier the kit must be supplied via the existing power supply of the amp.

The Dumbleator offers numerous configuration options which are shown in the appended schematics.

Input Levels:
InA: 10-15 Vpp
InB: guitar level - 5 Vpp

The kit includes all the parts needed to build the "standard version" incl. a 12AX7, potentiometers and leads.
It does not include components that are required for the building the extended versions,  as well as a power supply or casing.

The Dumbleator 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:

• Schematics

Mixed sizes, length 10 cm / ea, black

• 30 x 1,5mm Ø
• 30 x 2,5mm Ø
• 20 x 4mm Ø
• 10 x 6mm Ø
• 6 x 10mm Ø
• 4 x 13mm Ø

• Insulation: Silicon
• Operation Voltage: 500 V
• Test Voltage: 2000 V
• Operating temperatures:    –50 bis +180 °C
• Packing:: 5 m
• Cross-Section: 0,5 mm²
• Outer Diameter: 2,1 mm
• Stranded wire structure: 16 x 0,20 mm, tinned copper

• Insulation: Silicon
• Operation Voltage: 500 V
• Test Voltage: 2000 V
• Operating temperatures:    –50 bis +180 °C
• Packing:: 5 m
• Cross-Section: 0,5 mm²
• Outer Diameter: 2,1 mm
• Stranded wire structure: 16 x 0,20 mm, tinned copper

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

Files:

• Datasheet

2 tubes, matched as pair

JJ KT77 - Red Label

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.

• 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

• 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