whisker biscuit - gain problem?

[ethrbunny]

I built the 'whisker biscuit' using the schem from runoffgroove.com. Its been in my line for about a year now where Im using it as a light distortion. I happened across the ROG site today and clicked on the samples for this pedal. The samples make this pedal out to be a serious fuzz. Does this mean that mine is wired incorrectly? Or just that the demos were made with waaay hot PUs?

It doesn't use FETs so there aren't any trimmers to adjust. Methinks that I did something wrong. I'd love to get the sound ala the demo.

[olcircuits]

Ethrbunny,

I asked my friend about this. The clips were made with a Tele single coil in the bridge and a Seymour Duncan '59 humbucker in the neck. No particularly hot output there. But check your voltages against this:

Q1 2N5088, 529 hFE

C: 4.23
B: .667
E: .046

Q2 MPSA13

C: 1.00
B: 1.15
E: 0

Q3 2N5088, 522 hFE

C: 4.36
B: .677
E: .046

Q2's collector is the odd one.  Power supply measured 8.91V under load.

[ethrbunny]

Thanks for the info! Wow!

I went and rechecked the layout last night and it *appears* to be ok. Its not a tough circuit and the fact that Im getting something usable through it makes me wonder. Ill do the voltages tonight.

Thanks again!

[olcircuits]

Ethrbunny,

Correction on Q2 (MPSA13):
C: 1.29
B: 1.16
E: 0

Supply (under load): 9.06v

Thanks goes to ROG!

[ethrbunny]

How v odd. My values are inline with yours for the most part.


For Q3 I have:

E: 0.02
B: 0.6
C: 6.5

but I didn't have a load on the line when I was measuring it.

I checked the values for everything around Q3 and they all look ok.