Obsolescence of groovy synth parts

[Jim Patchell]

Rick Jansen wrote:

> Oh, and we need OTA's! It's not easy to build VCA's and VCF's without OTA's.
> The Moog filter is an OTA, in a way...   I just noticed National Semi
> has issued a "lifetime buy" status for the LM13600, the LM13700 still is in
> full production. There aren't many OTA's really, are there? The only other
> OTA I know is the CA3080...
>

    And the CA3280.

> Rick Jansen

    -Jim