FUZZ ATTACK: beefed up STEBY boost/fuzz

[Steben]

Addition on the steby boost.
Put a couple of bass fuzzes after it and a tone control...
Addition of the 4k7 resistor is worth while, unless you never put the boost control to zero, which in fact makes sense.

[mac]

Going to try it. Looks nice.

BTW, when I messed with the bazz fuss, GE and SI darlington versions, I found that sometimes it is best to use a trimmer instead of the fixed 100k. It let me fine tune.

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Nice schem, rounded edges. An all-tube schem soft.

mac

[Steben]

You mean the collector resistors, right? yeah swapping one for a trimmer is always personalized DIY-style. 

rounded edges. An all-tube schem soft

I used to have a MOSfet software, not that bad, yet the edges were not that rouded when zoomed out.

[mac]

The std bazz fuss (darlington, 1n4148) uses a 100k at the collector. It sounded good for me, but with a trimmer I got the G-spot, sometimes far, sometimes near the std 100k. The first version used a simple med to high gain Si with a 10k at the collector. Same thing.
I always use trimmers for this reason in almost every pedal I test.

I used to have a MOSfet software, not that bad, yet the edges were not that rouded when zoomed out.

Have you tried Ge based soft?

mac

[DDD]

I've tried the circuit. The first and the second stages behave well, the third one (bazz fuss arrangement) converts sound to trash, regretfully.

[mac]

Fe de errata:
The darlington version uses a 10k at the collector; the single transistor a 100K.

There is a sound sample at home-wrecker of two cascaded B-F:
http://www.home-wrecker.com/buzzbox.mp3

This schematic suggests zeners. Maybe they have a different effect.

mac

[Steben]

I've tried the circuit. The first and the second stages behave well, the third one (bazz fuss arrangement) converts sound to trash, regretfully.

This schematic suggests zeners. Maybe they have a different effect.

Actually, I suggested to avoid zeners, since they produce exactly what you say: a different effect. Since they conduct in two directions, you get a kind of assymetric yet classic clipping. Maybe you hit the nail, mac, and one should try zeners in the last section, providing larger headroom. I suggest using low gain trannies for Q2 and Q3 to tame distortion. Using only one bazz fuss with high gain transistor will have results, yet maybe less touch sensitive than cascade of two low gains.

[mac]

Sorry I  misunderstood.
I remembered to have tried back to back diodes when I experimented with the home-made darlington B-F. The reverse diode and its small leakage acts as large resistor.


mac

[Steben]

You could also just drop the second bazz fuss stage, yet I would choose the 220n decoupling cap instead of the 470n, to cut some flabby bass.

[DDD]

Hi Steben,
Have you tried the second bazz fuss stage with PNP tranny instead of the NPN one?

[Steben]

Hi Steben,
Have you tried the second bazz fuss stage with PNP tranny instead of the NPN one?

To compensate the assymetry, right (turning diode...)?
good idea. In fact it's the basic idea behind the steby boost, followed by the first NPN bazz fuss.

[mac]

I´m going to experiment  with  these ideas. Gonna report back.

mac