TRANSISTOR, VALVO: OC45 / OC44 Germanium Transistor Datasheets

Valvo OC44 OC45 datasheet d096c7842994

Valvo transistors were produced in Germany, as a subsidiary of Philips (not unlike Mullard in England).   More information on Valvo can be found here.  My experience with Valvo, is that they are pretty much identical to their English counterparts. The OC45 is a PNP germanium alloy transistor intended as IF amplifier in AM broadcast receivers. … Read more

GUITAR ELECTRONICS

Not my content, but these are some of the best explanations of the relationship between the pickup, pots and caps that I’ve ever seen.  David from Ann Arbour Guitars knows his stuff and has the gear to demonstrate it really well.    I think my favourite video is the capacitor comparison.  I’d say a few … Read more

EARTHQUAKER DEVICES: Spires Green Channel

EQD Spires Green 015 vero v1 bb5983122697

The Earthquaker Devices Spires green channel is a variation of one of my favourite fuzz circuits – the Rosac Nufuzz.   It’s a progression of a fuzzrite from the original designer, but it has a tone control on the output sweeping between a small and large cap to provide a thin to thick fuzz sound.  There’s … Read more