With all the modern amplifier and effects technology available today, there's still something to be said for the classic sound you get from a real tube amp. Sure, they're heavier and more ...

You don’t need to be spending your spare time at the breadboard to understand how to put all this together. Inside the box there is even a tube of Goop so you can cover up all the internal circuitry ...

The amplifier schematic is also shown in Fig.2. We employ a current mirror type amplifier without current source. The resistors Rb are used to keep the DC bias voltage as half-vdd. The resistance is ...