dragonbeard substitution

[chris weaver]

could an op07 be used in place of lm308?

[benny_profane]

Yes. IC1 and IC2 can be changed to anything that is substituted in other Rat builds. Note that depending on the IC that you use, you may have to change/omit the compensation capacitors (i.e., C2 and C6).

[danfrank]

But LM308 has that special mojo! And eBay has real ones for $3 each. I know one of the original Expandora versions substituted a TL072 for the two 308s and nobody likes that version. Lost of complaints about it being very noisy compared to the others.
Just my opinion...