Mod 101 - User Manual

1 Copyright © 2015 by modkitsdiy.com
Use these instructions to learn:
How to build a tube amp.
How to bias a tube amp for 6L6GC or EL34 power tubes.
Some modifications for altering the tone of a tube amp.
This tube guitar amplifier circuit is basic and classic. It can produce warm clean tone at low volume and
rich overdrive distortion at higher volume.
1 5/
16"
ON
OFF
POWER STANDBY BASS TREBLE VOLUME
INPUT
0 10
5
2 8
3
4 6
7
1 9
0 10
5
2 8
3
4 6
7
1 9
0 10
5
2 8
3
4 6
7
1 9
MOD 101
TUBE AMP KIT
MOD 101 GUITAR AMP KIT (K-MOD101)
www.modkitsdiy.com

Mod 101 Specifications

General

Brand	Mod
Model	101
Category	Musical Instrument Amplifier
Language	English

Summary

Critical Safety Precautions

The One-Hand Rule for Safety

A safety precaution for working with high voltages to prevent electric shock.

Soldering Best Practices

Wiring Best Practices

Chassis Top Component Mounting

Mounting Top Components (Steps 1-4)

Instructions for filing chassis holes, mounting bias label, bias pot, and rubber grommets.

Tube Socket and Handle Installation

Mounting Tube Sockets and Clips (Steps 5-6)

Transformer Mounting Procedures

Mounting Output and Power Transformers (Steps 8-9)

Detailed steps for installing the output and power transformers onto the chassis.

Front Panel Component Installation

Control and Input Jack Installation

Filter Component Installation

Front Component Wiring

Potentiometers and Input Jack Wiring (Step 1)

Switch and Filter Wiring

Power, Standby, and Filter Wiring (Steps 2-3)

Impedance Selector Switch Wiring

Connecting TR2 to Impedance Selector (Section 7)

Tube Socket and Terminal Interconnect Wiring

Connecting Tube Sockets (Step 1-3)

Terminal Strip Interconnects and Filaments

Power Tube Bias Adjustment

Bias Resistor Measurement (Step 1)

Measuring the resistance of the cathode resistor used for biasing.

Troubleshooting Supplement Overview

Using the Troubleshooting Supplement

Guide for measuring voltage test points to identify and locate problem areas in the amp.

Troubleshooting Safety and Test Points

Safety During Troubleshooting

Important safety warnings and a list of test point sections within the supplement.

Filter Section Voltage Tests

Filter Section (Top) Voltage Measurements

DC and AC voltage readings for the top filter section test points.

Filter Section Inside Voltage Tests

Filter Section (Inside) Voltage Readings

DC and AC voltage readings for the inside filter section test points.

Power Tube Bias Supply Voltage Tests

Bias Supply Voltage Measurements

DC and AC voltage readings for the power tube bias supply circuit.

Tube Electrode Voltage Tests

Preamp and Power Tube Electrode Voltages

Power Switch Functionality Check

Continuity Testing of Power Switch