Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

Should work fine. Install a good socket if you want. Then you can use a TL072 when you get one.

--- In korgpolyex@yahoogroups.com, "selloutdesigns" <aah_public@...> wrote:
>
> Anyone know offhand if a tl082 can safely replace a tl072? They do appear compatible.
>
> Thanks,
>
> <<aaRoN>>
>
> --- In korgpolyex@yahoogroups.com, Gordon JC Pearce MM3YEQ <gordon@> wrote:
> >
> > On Wed, 2009-03-04 at 13:34 +0000, narfman96 wrote:
> > > Definitely timing issues with IC36b the interrupt oscillator. Try
> > > disconnecting the output at R107 and see if it runs at the correct
> > > frequency. If it does the CPU is loading it down somehow. If not then
> > > suspect the timing caps C76 or C79. The resistors R102-R104 need to be
> > > verified and then the Tl072 op amp itself. This circuit needs to run
> > > in the mhz or no go for the LED display and envelope generators.
> >
> > Bah. Just change the TL072 on spec. Horrible things.
> >
> > Gordon
> >
>