[sdiy] Overdriving 4069UB

[Harry Bissell Jr]

If you run on 0-15V and bias to 1/2V... it will still
  clip symmetrically, but to 0-15V.
  
  If some of the sound u like is comming from blasting
  the CMOS inputs... then you should stay where you are at.
  
  I can see no reason to not use the shottky diodes...
  
  H^) harry

Seb Francis <seb at burnit.co.uk> wrote:  Harry Bissell Jr wrote:

> Just saw the schematic.
>
> I would AC couple into the first opamp, bias the non-inverting input
> at 1/2Vcc and run the opamp on 0-15V (like a guitar stompbox). That
> would cure all your worries about exceeding the CMOS limits
> completely.
>
Wouldn't this introduce non-symmetrical hard clipping since the TL072 
won't go down to negative rail voltage?  I will try it, but I'm really 
happy with the sounds I can get from the current circuit, so I'm still 
leaning towards the schottky diode option.

Seb




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