[sdiy] Prophet 10 op-amp swaps?

[Eric Frampton]

We're looking at the same thing; jump down to pages 29 and 30, the EQ section, and you'll see 'em.



On Jul 31, 2013, at 8:12 PM, Dave Manley <dlmanley at sonic.net> wrote:

> I'm looking at page 27 of the PDF which has the upper and lower eq, but not U820 or U821?
> 
> Are we looking at different schematics?  The ones from cem3374.com?
> 
> Eric Frampton <eric at ericframpton.com> wrote:
>> Hi Dave -
>> 
>> The op-amp(s) in question are U820 and U821, used for the Upper and
>> Lower EQ's.
>> 
>> I've installed sockets for all of these, yep. I figured, worst case, I
>> could always put the original op-amps back in if this experiment didn't
>> work, or if someday I had to sell the keyboard and someone else wanted
>> it completely stock.