freestompboxes.org

Is it possible to emulate a lm13700 with 2 ca3080? I see schematics for lm13700 to ca3080 adapters but right now, it looks like ca3080 are available but lm13700 are not so I’d need the opposite.

Where are you finding ca3080s?

Yeah, where can I get non-fake CA3080.

Mouser still has them (part number LM13700N/NOPB), they're not quite gone yet.

To convert 2x CA3080 to LM13700 you need to know a bit more about the circuit and the application. If the LM13700's Darlington buffers are used, you'll need to wire those offboard since the CA3080 is only the OTA portion. Some circuits like the Ross/Dyna Comp don't use them (having been originally designed with the 3080), but others like the Small Stone do (having been originally designed with the CA3094, which is basically half a 13700 including buffer). The buffer is straightforward, just a couple of transistors and resistors, but does take up a non-trivial amount of space in a through-hole layout.

Why would you ever want to do this? Are 13700s really that hard to find?