
I’ve had this 1969 Fender for couple of years now, and it is definitely a keeper.

Fender Blender arrived in 1968 at the peak of the 1960s fuzz circuit expansion. The shift toward high-gain saturation had begun in 1962 with Gibson’s Maestro FZ-1 Fuzz-Tone, triggering a decade of rapid development. This period saw the rise of the Fuzz Face and Mosrite Fuzzrite, alongside the Shin-ei/Univox Superfuzz and several evolutions of the Tonebender.
The Blender’s octave stage utilizes a transistor splitter followed by diode rectifiers to create full-wave rectification. Recombining the signal produces a dense, high-gain fuzz with a distinct octave-up harmonic.