LM308N

Reference: IC-294

LM324N

Quad opamp

Reference: IC-272

OPA2604AP

Burr-Brown DIP8

Reference: IC-276

TL074CN

Texas Instruments DIP14

Reference: IC-257

CA3080E

Intersil OTA

Reference: IC-287

LM358AN

Reference: IC-261

TL061

Reference: IC-292

CA3130

Reference: IC-258

TL082CP

Reference: IC-268

TL062ACP

Reference: IC-264

MC1458

Reference: IC-283

JRC4558D

Brand: Analog Devices

OP275

Dual Bipolar/JFET, Audio op-amp

Reference: IC-273

TL022

Reference: IC-275

UA741

Brand: Burr-Brown

OPA2134PA

SoundPlus(TM) Hi-Perf Aud Op-Amp

Reference: IC-263

LM13600N

National Semiconductors