A bit of a classic – the MK1.5 Tone Bender. Some great phots and background information here on Fuzzboxes.org and some great video demos below – who better than Ant Macari to talk Tone Benders.
Note that some earlier versions carried a 500k volume pot, instead of 100k resulting in more bass – ultimately bringing it closer to a Fuzz Face.
One of the main differences to a Fuzz Face is the use of OC75 transistors. The key to this is that they are very leaky, and will not bias the same way as a regular fuzz face. Do not try and bias it like a fuzz face with 4.5v on the collector of Q2 – it will be around 7 or 8 volts.
