OP07 in place of OP27? Re: [sdiy] Timbre Modulator (EN#72) - who needs SAW VCOs?

[Fahl, Romeo]

I can't remember off the top of my head exactly what was used, but the
original Electronotes version doesn't use anything fancy for that opamp.
Scott used to work for PMI, which is why he has a cache of OP27s.  I
used a plain old TL072 which has worked fine for me.

Romeo

 

> -----Original Message-----
> From: anthony [mailto:aankrom at bluemarble.net] 
> Sent: Tuesday, April 04, 2006 4:49 PM
> To: Fahl, Romeo; gregory zifcak; rykhaard at gmail.com; 
> synth-diy at dropmix.xs4all.nl
> Subject: OP07 in place of OP27? Re: [sdiy] Timbre Modulator 
> (EN#72) - who needs SAW VCOs?
> 
> I just made a quick persual of this schematic and wondered if 
> I could use an
> OP07 (that I already have) in place of the OP27 in the 
> schematic? My first guess is yes if the low-offset is the 
> biggest concern. I have a TL051 as well and it has a pretty 
> low offset (voltage, but current? hmmmm... lemme
> see...)
> 
> ----- Original Message -----
> From: "Fahl, Romeo" <RFahl at extensis.com>
> To: "gregory zifcak" <zifcak at hotmail.com>; 
> <rykhaard at gmail.com>; <synth-diy at dropmix.xs4all.nl>
> Sent: Tuesday, April 04, 2006 1:30 PM
> Subject: RE: [sdiy] Timbre Modulator (EN#72) - who needs SAW VCOs?
> 
> 
> > Scott Bernardi has it on his site:
> >
> > http://home.comcast.net/~sbernardi/elec/og2/og2_timbremod.html
> >
> >
> >
> >> -----Original Message-----
> >> From: owner-synth-diy at dropmix.xs4all.nl 
> >> [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of gregory 
> >> zifcak
> >> Sent: Tuesday, April 04, 2006 10:15 AM
> >> To: rykhaard at gmail.com; synth-diy at dropmix.xs4all.nl
> >> Subject: Re: [sdiy] Timbre Modulator (EN#72) - who needs SAW VCOs?
> >>
> >> schematics anyone?
> >>
> >>
> >> >From: "Rykhaard D.A.M.I.A.N." <rykhaard at gmail.com>
> >> >To: synth-diy <synth-diy at dropmix.xs4all.nl>
> >> >Subject: Re: [sdiy] Timbre Modulator (EN#72) - who needs SAW VCOs?
> >> >Date: Tue, 4 Apr 2006 01:23:01 -0400
> >> >
> >> >If it's the one with the switch, for varying the effect - 
> toss the 
> >> >switch away and solder the connection closed.  Sounds much more 
> >> >variable / intense, than when it's open. :) (Built 2 or 3 in
> >> the 90's
> >> >and will be building it again, with full VC modifications,
> >> as well. :)
> >> >LOVE that one. :) )
> >> >
> >> >
> >> >On 4/3/06, Dino Leone <dino.leone at stanford.edu> wrote:
> >> > > I just finished breadboarding the timbre modulator as
> >> described in
> >> > > Electronotes #72 (page 15) and I'm in heaven!
> >> > > Who needs SAW VCOs? I'm using sine output of the MOTM300
> >> VCO for the
> >> >timbre
> >> > > modulator and it generates wonderful tonal variations. 
> It's truly
> >> >amazing:
> >> >
> >> >--
> >> >Take care,
> >> >Warmth and Peace,
> >> >Ryk
> >> >
> >> >My NEW webpage home:
> >> >http://www.sdiy.org/damian/index.html - still transferring
> >> all from the
> >> >old site - Mar 2706
> >> >
> >> >http://deathlehem.bravehost.com/damian.html - my modular
> >> synthesizer,
> >> >D.A.M.I.A.N.;s OLD webpage
> >> >
> >>
> >>
> >>
> >
> > 
> 
> 
>