Mosfet Booster with BS250

[ubersam]

I wanted to try an AMZ Mosfet Booster build but all I have at the moment are two BS250s. Can these be used insted of the BS170 if I flipped the power and the elect. caps? Or should I just try one section of the Obsidian?

[pyrop]

Hi ubersam, I would say either one would work fine.
You would have to flip the zener diode as well with the AMZ mosfet booster.

pyrop

[WGTP]

http://www.diystompboxes.com/analogalchemy/pedals/obsidian.gif

Try using one of these stages (or maybe 2).   

[stm]

Sorry, posted in the wrong thread 

[ubersam]

Very cool. Thanks guys. Just some questions about the zener diode, I seem to remember reading that if the Mosfet used has an internal diode protection, the external zener diode could be omitted. Is this correct? The datasheet for the BS250 shows a diode from the drain to the source, would this be the protection diode? Lastly, in the absence of a zener diode, could a regular silicon like a 4n400x take its place?

Thanks again.

[WGTP]

I think all the typically used Mosfets 2N7000/BS170/BS250's have the internal diode.  Some designs use an common LED for the diode to protect against static discharge frying the Mosfet.