A and T Labs
K6 Audio Power Amplifier Assembly Manual
2001 A and T Labs Inc.
AMK6a
6
Before beginning, refer to and review the soldering techniques and suggestions and
static electricity management information sheets. These are very important and must be
followed to ensure the highest quality results.
Following is a list of tools required to complete this project:
•
Soldering iron
•
Needle nose pliers
•
Diagonal cutters
•
Small Phillips and flat blade screw drivers
•
Small Allen wrenches
•
Digital voltmeter with milliamp range and ohmmeter capability
•
(0ptional) Oscilloscope and signal generator
3.1 AMPLIFIER BOARDS
If you are building a stereo unit, the steps in this section will need to be repeated. You
may wish to build the two channels in parallel for efficiency of effort.
Begin by installing all resistors, capacitors, and diodes in their appropriate places. (See
parts placement Figure 4.) Check values of resistors as you proceed, and take care to
orient diodes and electrolytic capacitors properly. Decide if you will want to include the
bridging and differential input options.
If so, parts required for bridging are marked
with a * , parts for differential input are marked with ** , and parts for the extra
output transistor option are marked with *** in the checklists.
Resistor coding guide - Resistors are identified by color stripes and can be decoded as
follows:
Example: 46.5K, 1/4W, 1% - Yellow-Blue-Yellow-Red (space) Brown
It’s always a good idea to check the value of each resistor with an ohmmeter before
installing!
First Digit
Second Digit
Third digit
Number of zeroes
Percent tolerance
Code:
0 – Black
1 – Brown
2 – Red
3 – Orange
4 – Yellow
5 – Green
6 – Blue
7 – Violet
8 – Grey
9 – White
