new site & pedal

[WGTP]

I'm using 2 GE's in a Black Fire Stage right now, with the standard resistor values.  I'd recomment getting the highest hFe that Small Bear has for sale.

[Joe Davisson]

You can rebias a Vulcan or Blackfire stage to accomodate any transistor type. PNP Vulcans won't work right because of the diodes. (Untried: A PNP transistor configured as a diode may work in the Vulcan.) Hot humbucker users should alter the parallel resistor/cap values after the gain control, raising the resistance and lowering the capacitance proportionally.

I haven't tried opamps with diode-inputs, but will eventually. With these circuits, the tonal difference between BJT/JFET/MOSFET is not great, besides the amount of available gain.

To my knowledge, the amplifier stages (Vulcan, Blackfire 1/2) are "new". There is a circuit similar to the BF stage whose purpose is to raise frequency response, but that's the only one I'm aware of at this time.

-Joe

[swt]

Well thanx guys!. Thanks Joe for sharing and for amazing designs!. I've built a blackfire with bc109c, and doug's highway, using the blackfire stage, with bc549c, but still can hear a little hard edge of silicon in there, that's why i was asking that. I'll give this a try with some ac187, ac127, and 2sd352 i have lying around. Thanks again!!.