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Fuzz Central Home Page -> Fuzz Central Forum -> Effects Projects -> Rebuilding Dunlop Fuzz Face
Post Info TOPIC: Rebuilding Dunlop Fuzz Face
dstrats


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Rebuilding Dunlop Fuzz Face
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Hi all,
New here... Looks like a great place to hang. O.k. I own a late '90s blue colored Dunlop Fuzz Face. It sounds bad but I love the color. I want to rebuild it to be like my other older Fuzz Face (Crest '80s Si Model) so I can retire the Crest model.

I was wondering if I could use the Dunlop's circuit board and just get better quality transistors and resistors and such. Or do I have to get a whole new circuit board. I was also wondering if I can just take out the two lousy NKT275 and just replace them with my desired transistors BC109C and SK3245. I asked "Analogman" about just changing the transistors and he said I can do that but I'd have to re-bias it. How do you do that?

I look forward to some responses. Thanks so much!

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-Diego www.cdbaby.com/cd/diegopicetti
tfc


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The bias resistor for q2 is normally 470 ohms for the pnp germanium version of the fuzz face. For the bc109c and sk3245 transistors, you have to bias the fuzz for npn silicon transistors. That makes the resistor that goes from b+ making the node point with the output capacitor and 8.2k resistor, 330 ohms. Of course all of the polarized capacitors-20uf/22uf and 2.2uf as well as the battery cables have to be reversed in the circuit to work along with the changed resistor.


For more information, visit R.G. Keen at: www.geofex.com



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