[sdiy] Aaron's take on the Buchla 258 (rough draft)

mark verbos mverbos at earthlink.net
Tue Jul 21 08:57:19 CEST 2009


On Jul 20, 2009, at 9:54 PM, Aaron Lanterman wrote:

>
>
> I made a few tweaks:
>
> 1) The original 258 has some resistors that you change or leave in  
> or out depending on if you want a square wave or sawtooth wave.  
> After studying the schematic a bit, I figured you could switch  
> between the modes using a three-pole, double-throw switch (which are  
> available), so I went ahead and set it up to work that way.


be careful. I think the trimming will need to be different for the two  
modes. If you have your heart set on the switch, you may want to  
figure out a way to trim the 2 modes individually.

Mark



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