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Section 1: About This Manual
This manual gives the information needed to build and install the upgraded power supply
for Dynaco's PAT-5 Preamp. This upgrade changes out the power supply PCB but keeps
the power supply transformer, with the following advantages over the original power
supply:
Lower noise
Lower output impedance
More efficiency, runs cooler, promotes longer life of the electronics
Use this power supply, the PAT5PM15, if you are using Updatemydynaco line stages and
phono stages. This power supply does generate +/-15 volts, but it doesn't generate the 42
volts required by the original PAT-5 phono preamp. If you're keeping the original PAT-5
phono preamps, you'll want to use the PAT5PWR supply that we make.
Important Note: this kit and the transformer are only compatible with 120 VAC power.
Who Should Attempt this Project?
You can build this kit 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
(none are posted as of this version of the manual).
Tools you'll need
You'll need the following tools:
1. Phillips screwdriver (#1 and #2), regular screw-drivers.
2. Pliers or nut drivers suitable for #4 and #6 hardware
3. needle nose pliers (helpful, but not strictly necessary)
4. pencil type soldering iron of 25 to 50 Watts (no huge honking soldering guns or
blowtorches)
5. wire cutters and strippers
6. multi-meter to measure power supply voltages and confirm resistor values
(strongly recommended)!
Helpful Tools
These tools aren't strictly necessary but make building the kit easier.
1. magnifying glass, if you're over 42!
2. lead bending jig to form axial component leads to the correct span for insertion in
the PCB.
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