thank you for the replies.
Optikon:
its not shorted to its source when the switch is down.;
I'm using the 741 because i had it lying around, this is just a prototype.
No its not a school assignment.
I can't use an analog switch because the process is fully automated.
Please note; this circuit works FINE if I remove q1 and q3 from the circuit.
The idea of q1 and q3 is to ground the other terminal of the op amp. ie. if Q2 is on, Q3 will ground the other terminal.
audioguru
theyre not upside down, the idea of q3 and q1 are to provide a ground path to the op amp (as said above).