new clipper with dual opamp?

[burningwater]

just breadboarded a new clipper and realized I dont have a TL071 here. I tried sticking in a 5332 and using the 1st stage with the different pinout but its not working. Did I get the pinout right?

1 out
2 neg in
3 pos in
4 ground
8 9v+

and I just left pins 5,6,7 open

is this correct or do I need to ground the open pins or something?

Thanks!

[burningwater]

oops, never mind I had the input plugged into the wrong hole. Works - lots of gain but on the noisy side - perhaps a gain pot would be in order. Also need to throw a 071 in there.

[sfr]

When using only one side of a dual op-amp, I always tie the inverting input to the output, and tie the non-inverting input to my bias voltage.  I don't even really remember why I do it anymore (perhaps someone would chime in) but I'm assuming it's good practice and that there was a reason I started doing it.  If you look at some of the schematics at Tonepad and Geofex that use only half of a dual opamp, you'll see this in the schematics and/or layouts. 

[MartyMart]

sfr - that's good "standard" practice for 1/2 opamp use
Things can get "wierd" if you don't do this ....
MM.

[markm]

sfr - that's good "standard" practice for 1/2 opamp use
Things can get "wierd" if you don't do this ....
MM.

Interesting as alot of the "older" circuits using 1/2 of a dual op-amp usually just ground the unused side.

[burningwater]

Jumping pins 6 & 7 cleaned things up. grounding them with pin 5 had the same result. Circuit sounds decent with less gain, clipping and high end.