Alpha 250 kOhm log

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

MiL-C-17, type RG 187
heat resistant

• Insulation: PTFE, 1.6 mm D.
• Inner conductor: Staku stranded wire 7 x 0.10 mm, silver-plated
• Inner conductor diameter: 0.30 mm
• Outer conductor: silver-plated copper braid
• Outer insulation: PTFE. Outer diameter: 2.69 mm
• Wave impedance: 75 ±3 ohm
• Operating temperatures: –55 to +200 °C
• Capacitance: approx. 63 pF/m.
• Operating voltage: max. 1000 V
• Attenuation (100 m) at 200 MHz: approx. 34.4 dB
• Outer insulation: white
• Length: 1 m

• Switchcraft RCA phone jack 3501FRX
• rear mounted

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 100 µF
• Voltage Rating: 350 V
• Tolerance: +/- 20%
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 18 mm x 37 mm
• Termination Style: axial

2 tubes, matched as pair

JJ EL84 / 6BQ5 Red Label

Files:

• Datasheet

• Type: Metalized Polyester Film Capacitors
• Voltage Rating: 250 V
• Tolerance: +/- 10%
• Operating Temperature Range: - 40°C / + 85 °C
• Termination Style: axial

• Bag for Reverb Tank, Size: 17"  (43cm),
• Black Tolex
• Made in Germany