Modding a DSOTM Fuzz

[Chuck]

I’ve been contemplating turning a DSOTM Fuzz into an approximation of one of its not too distant relatives – the version nobody sells a board for.  Q1 and 2 would stay as BC109s and Q3 is replaced with an NPN Germanium with an hfe above 50.  Mods to the BD are R6 – 56K, R7 – 10K, R10 – 5.1K, R11 – 5.1K, R12 – 75K, R13 – 47R, C1 – 47n, C2 – 47p, C3 – 2.2u, C4 – 3n3, C5/7/8 aren’t used, C9 – 47p, C11 – 220n, C13 – 1n, everything else is per the BD.  Anybody see anything that screams “DON’T DO IT!” or whispers “That can’t work, bless his heart” please chime in.

Thanks,
Chuck

[Cybercow]

Chuck – I suggest socketing those components you’ve listed try it out. Nothings screams “Look out! Burn-out ahead!” Although I suspect the biasing resistors around Q2 will need some value changes to accommodate the germanium BJT.

[Chuck]

Roger on the sockets.  The resistors surrounding Q3 are kind of odd between the three variations of the circuit – the DSTOM has a 2.7K and 10K, Madbean’s Cosmopolitan (with a Germanium Q3) has an 8.2K and 2.7K, and the thus far unnamed variant (also with a Germaniun Q3) has a pair of 5.1Ks.  Hopefully I’ll be posting a fine example of outstanding brilliance in the near future.

Chuck

[Author]

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