[sdiy] Prophet 10 op-amp swaps?

[Tom Wiltshire]

OPA134 has a Gain-bandwidth product of 8MHz, so that might explain why it works fine.

It looks like putting amps that are *too* fast in this circuit isn't the best idea since it doesn't include compensation we might consider standard, but that they didn't need for the older op-amps they used originally.

T.


On 1 Aug 2013, at 09:01, Oakley Sound <oakleylist at btinternet.com> wrote:

> I did my Prophet 10 swap out with OPA134. I typically check for things like oscillations, noise and offset problems. No such things existed with the OPA134 - although I could have been lucky with a marginal layout.
> 
> You could try an extra 33pF capacitor across pins 2 and 6 of each EQ op-amp.
> 
> Tony
> 
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