Hi Michael,

Germanium transistors have a very small leakage current which grows when temperature rises. This is what makes them unique in vintage amplifiers. They tend to add a small amount of noise to the sound, causing a bit of “crunchy” effect.

This is also a challenge to construct a Darlington circuit using these legacy transistors.

Hmmm, let me think, there must a way to work around this.

What a great idea to bundle all these project in a pdf book. Maybe in the same style as the original Lectron manuals.

But I haven’t finished constructing circuits around the start and expansion set yet, new fresh ideas come to my mind !