Section 1: About This Manual; Who Should Attempt This Project; Tools You'll Need - DYNACO STEREO 120 Updating Instructions

Section 1: About This Manual

This manual gives you all the information you need to bring your Solid State Dynaco
Stereo 120 Power Amplifier up to date using UpdateMyDynaco replacement modules
and UpdateMyDynaco Super Heat Sinks. These heat sinks offer these advantages
compared to recycling the original Dynaco heat sinks:
1. The Super Heat Sinks let you deliver 60 Watts Per Channel into 8 Ohms with
much less temperature rise than the original heat sinks. It even allows the delivery
of significant 4 Ohm power, limited mainly by the power supply regulator's
designed-in fold-back.
2. The amount of disassembly and reassembly is much less when you use the Super
Heat Sinks. You preserve the old Dynaco amplifier modules, and the job of
updating your Dynaco will probably take about an hour less time.
3. A secondary market for original Dynaco Stereo 120 amplifier modules might
develop on EBay. Perhaps you could offset the cost of the UpdateMyDynaco kit
by selling the original modules.
The only part of your Stereo 120 that really needs to work is the power supply. With this
kit, you'll build good sounding, highly reliable amplifiers to replace the original amplifier
modules.

Who Should Attempt this Project?

You can build this kit and update your Dynaco Stereo 120 if you can:
1. solder (using normal rosin core solder and a soldering iron).
2. use simple hand tools like screwdrivers, wire cutters, and pliers.
3. read and follow directions.
It helps if you:
1. know a bit about electronics, or
2. have a friend who knows a bit about electronics
3. can get to YouTube to watch a few helpful videos about the assembly process

Tools You'll Need

You'll need the following tools to update your Stereo 120:
1. flat blade screwdriver for #6 screws
2. Phillips screwdriver (#2)
3. pliers or nut drivers suitable for #6 hardware (5/16" nut driver or hex wrench)
4. needle nose pliers (helpful, but not strictly necessary)
5. pencil type soldering iron of 25 to 50 Watts (no huge honking soldering guns or
blowtorches)
6. wire cutters and strippers
7. multi-meter (helpful, but not strictly necessary)
8. magnifying glass, to verify identification codes on the 3 COG capacitors
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