Help with Pedal Schematic

[shawnc]

Help with Pedal Schematic
Please help me.

I would appreciate any help in this mater. Much appreciated.

I am attempting to build the umble circuit from the http://www.runoffgroove.com/umble.html website.

If you look at the attached file, I have 3 specific questions(Circled in red and numbered on my attached file).(  http://acapella.harmony-central.com/forums/attachment.php?s=&postid=15142430 )

1)How are the FETS setup pin wise, I can see 3 wires on the FET and wonder how they get wired up. Example... looking at the part with the label towards me is the left most wire the bottom conection to the 1.5k resistor and 4u7 capacitor in the schematic? The wire hooked up to the input through the 22k and 1M resistors, is that the middle wire on the FET? And finally the right most wire hooked up to the 100k trim pot? If I reverse the wiring, what would the results be?

2) The 100 K trim pots how do they wire up, the trim pot I have has a left and right connection and a center connection. If this is reversed would it still work, just in the opposite direction?

3) Last one, With reference to the bass, treble and mid controls, I know the pots connections are wired 1,2,3. Which one is one, which one is three, when looking at the back of the pot, how is it labeled? If I reverse the wires, does it work in the opposite direction?


Other questions:
1)What would happen if I switch a log with a linear pot? For Volume, gain and eq'ing? And vise versa.

2)Has anyone here built this pedal? How does it sound.

Thanks to all who reply.

Cheers

ShawnC

[lovric]

               1
         | /
2  ---|
         | \
              3

1 drain
2 base
3 source

a) take a look into a data sheet of the fets you use and see which leg corresponds to which number.

b) if you switch 2&3 it does work in opposite direction

c) the middle lug (number 2)  on a pot is 'washer', that's the one with the arrow on the schematic.

other:

a) both work, you choose what feels better to you

b) good sustain 

ciao,
marin

[shawnc]

Thanks for the info Marin, much appreciated.

Cheers

[wampcat1]

Help with Pedal Schematic
Please help me.

I would appreciate any help in this mater. Much appreciated.

I am attempting to build the umble circuit from the http://www.runoffgroove.com/umble.html website.

If you look at the attached file, I have 3 specific questions(Circled in red and numbered on my attached file).(  http://acapella.harmony-central.com/forums/attachment.php?s=&postid=15142430 )

1)How are the FETS setup pin wise, I can see 3 wires on the FET and wonder how they get wired up. Example... looking at the part with the label towards me is the left most wire the bottom conection to the 1.5k resistor and 4u7 capacitor in the schematic? The wire hooked up to the input through the 22k and 1M resistors, is that the middle wire on the FET? And finally the right most wire hooked up to the 100k trim pot? If I reverse the wiring, what would the results be?

http://www.fairchildsemi.com/ds/J2/J201.pdf 

2) The 100 K trim pots how do they wire up, the trim pot I have has a left and right connection and a center connection. If this is reversed would it still work, just in the opposite direction?

http://www.diystompboxes.com/cnews/FAQ.html

3) Last one, With reference to the bass, treble and mid controls, I know the pots connections are wired 1,2,3. Which one is one, which one is three, when looking at the back of the pot, how is it labeled? If I reverse the wires, does it work in the opposite direction?

http://www.diystompboxes.com/cnews/FAQ.html

Other questions:
1)What would happen if I switch a log with a linear pot? For Volume, gain and eq'ing? And vise versa.

http://www.diystompboxes.com/cnews/FAQ.html

2)Has anyone here built this pedal? How does it sound.

Nice and smooth distortion

Thanks to all who reply.

Cheers

ShawnC

Hope that helps!

[shawnc]

thanks for the info Wampcat, very helpfull.

Cheers

ShawnC

[wampcat1]

thanks for the info Wampcat, very helpfull.

Cheers

ShawnC

Glad it helped shawn -- if you haven't already, make sure you check out the diy faq and the geo faq, it should answer tons of other questions that will come up on the first couple of builds.
(geo: http://www.geofex.com/effxfaq/fxfaq.htm )

Hope that helps!

Brian