EN72 Timbre Modulator (was: Re: [sdiy] Minisonic)

[Fernando de Izuzquiza]

Tim, the 307 and 556 are from a different circuit, not the Minisonic.  
But thanks for the warning.
Now I know that, in the 70s, the 556 was a slightly better 307 op amp.
And that as Ken says, are replaceable by TL07x (in case the 307 isn't  
crucial for the waveshaping for any reason/spec)

In fact the circuit I was looking at is from an Electronotes (free)  
article:

"Timbre Modulator" Option 1
http://electronotes.netfirms.com/free.html
(scroll down to "[Electronotes 72 Timbre Modulator]")

Fernando

>
>> I found this page
>>
>> http://pcbunn.cacr.caltech.edu/jjb/Synthesizers/Minisonic2/ 
>> default.htm
>
> I've got a real one somewhere.  Fat, in an out of tune
> sort of way...
>
>
> Steve

I didn't know it existed. Nice little guy.