Based around a silicon transistor, the circuit also features BC109B and BC109C transistors, and promises tones from early Stones and Hendrix to modern high-gain. You may like Wampler Pedals promises ...

This circuit can pick up medium wave stations in your area. It can use general purpose transistors, and in this example there are 3 BC109C transistors. The schematic and BOM show a 200µH inductor and ...

This one is a high quality audio intercom circuit that consists of two identical intercom units and each unit consists of four parts which are a power supply, a microphone preamplifier based on direct ...

The first stage that is built around BC109C transistor acts as a buffer and provides the circuit with a high input impedance at around 250kΩ. The gain of the stage is nearly unity. Since the Baxandall ...

It has only one transistor and can support as many audio signal as you can afford. BC109C is a very cheap transistor and with a few resistors and capacitors you can build quickly a mixer circuit ...