Build directions
This design is very easy to build. You should start with all low SMD parts. Solder in the electrolytic caps at last. For this solder job I recommend a good pair of tweezers. I use a type especially made for SMD. With this pair of tweezers I get a very good grip. You must also have a soldering iron with a small tip but.
Make sure if you want the class A circuit or not, T13, T14, R14, R15. Determine also if you want any of the R1, R2 or R3 resistors. If you don't want the input filter just short R5 with tin or a small wire.
Start with all low SMD parts
- Resistors
Transistors
Capacitors, not the electrolytic ones - Then continue with the high electrolytic caps
- Wires
Check the finished amp
Apply voltage and check the output voltage. Measure the DC voltage at the output. It should be the specified offset voltage, a couple of millivolts.
Measure the quiescent current.
The whole buffer is ready.
Good luck and happy listening. Welcome to Per-Anders Sjöström's hifi pages.
