Hi,
Serge used 4558 from memory, and yes, the waveforms are all "soft". Earler
experiments I did were harder edged. There are other quad op-amps that are
even faster than the TL074, though I forget the number off hand.
Ken
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
Serge used 4558 from memory, and yes, the waveforms are all "soft". Earler
experiments I did were harder edged. There are other quad op-amps that are
even faster than the TL074, though I forget the number off hand.
Ken
>Hi Ken,_______________________________________________________________________
>
>Just a quick question regarding the Wavemultiplier. I was
>breadboarding it up last night, and I found that the pulse out
>quickly turns to a triangle wave as the frequency is increased.
>
>The 'scope reveals that this is due to slew rate limiting of the
>LM324 as it tries to crash from rail to rail at only 0.5V/uS. I'm
>just curious; is this by design to mimic what the original Serge unit
>did?
>
>I intend to put a TL074 in for IC4 which has a better slew rate of
>13V/uS and sharpen up those edges. I'll also attenuate the output as
>+/-15V is a bit hot :-0
>
>Fun Circuit, but I must admit I haven't listened to it yet. Lots of
>pretty pictures on the 'scope tho'.
>
>All the best
>
>Andy
>---
>
>Andy Wilson
>http://www.techman.synth.net
>andy@...
>
>
>
>
>See the following URLS for the CGS Modular Synth home page:
>Main: http://www.cgs.synth.net/
>Secondary: http://otherunicorn.0catch.com/synth/
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>