Vintage Synth Repair

Depends on what you mean with "upgraded".

If you like how it works and how it sounds, I'd
just leave it as it is.

If, however, you want to improove certain parameters,
you can certainly do this. Like using a low noise
opamp if your module is too noisy, or using a low
offset opamp if you think you have too much offset,
or using a FET input opamp if you have too much drift ...

JH.



> > Why would you even want to use a 411 instead of a 301?
> > 
> 
> According to the analogue heaven 
> archives, the audio path in the
> Arp 2600 can be upgraded by 
> substituting the 411 for the 301.
> However, it does require cutting
> pins 5 and 8 on the 411.
> 
> I am trying to determine if this
> is a wise mod or not.
> 
> Thanks for your input.
> 
> Ethan