[sdiy] Quad VCA design

[David G Dixon]

I stopped using OTAs entirely.  Now, it's all 2164, all the time,
exponential and linearized.


> I'd say that's definitely an improvement. Old OTAs were 
> absolutely terrible :)
> 
> On Wed, May 15, 2013 at 5:37 PM, Terry Shultz 
> <thx1138 at earthlink.net> wrote:
> > Hi Dave,
> >
> > Thanks four your feedback and to all the other guys as well.
> >
> > On a different note, I spoke to Tom Oberheim last week, and 
> he indicated that he was using the lm13600 based devices 
> otherwise his new SEM was pretty close to his original design.
> >
> > Best regards,
> >
> > Terry
> >
> > Sent from my iPad
> >
> > On May 15, 2013, at 8:30 AM, "Dave Magnuson" 
> <kingravine at comcast.net> wrote:
> >
> >> Hi Terry,
> >>
> >> You can get the v2164 at Small Bear for about $3-$4 each
> >>
> >> Dave
> >>
> >>> -----Original Message-----
> >>> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy- 
> >>> bounces at dropmix.xs4all.nl] On Behalf Of Terry Shultz
> >>> Sent: Wednesday, May 15, 2013 11:11 AM
> >>> To: cheater00 .
> >>> Cc: synth-diy at dropmix.xs4all.nl List
> >>> Subject: Re: [sdiy] Quad VCA design
> >>>
> >>> Hi Damian,
> >>>
> >>> Any cost idea on small volume usage?
> >>>
> >>> Regards,
> >>>
> >>> Terry
> >>>
> >>> Sent from my iPad
> >>>
> >>> On May 15, 2013, at 7:15 AM, "cheater00 ." 
> <cheater00 at gmail.com> wrote:
> >>>
> >>>> Hi Terry,
> >>>> people here really like the CoolAudio chips. The V2164 
> has met with 
> >>>> great reception on the list and is a very good equivalent to the 
> >>>> SSM 2164.
> >>>>
> >>>> Cheers,
> >>>> Damian
> >>>>
> >>>> On Wed, May 15, 2013 at 2:39 PM, Nathanael King 
> >>>> <nate at paperproductsmusic.com> wrote:
> >>>>> Not only does THAT have the 2180 line, but they also have an 
> >>>>> ssm2164 available in 2 vcas (2162) in a surface mount package.
> >>>>> http://www.thatcorp.com/2162_Dual_Pre-
> >>> Trimmed_Blackmer_IC_Voltage-Con
> >>>>> trolled_Amplifier.shtml
> >>>>>
> >>>>> Nate
> >>>>>
> >>>>> On Wed, May 15, 2013 at 8:33 AM, Terry Shultz 
> >>>>> <thx1138 at earthlink.net>
> >>> wrote:
> >>>>>>
> >>>>>> Hi All,
> >>>>>>
> >>>>>> I have finally used the last of my SSM2020 devices on 
> my boards 
> >>>>>> and it is time to re-design the Quad VCA and Universal Active 
> >>>>>> filter
> >> modules.
> >>>>>>
> >>>>>> I was looking at the LM13600/LM13700 and THAT Corp. 
> VCA devices.
> >>>>>>
> >>>>>> Any thoughts on those devices vs. other methods of building a 
> >>>>>> Solid VCA design?
> >>>>>>
> >>>>>> I have not had to re-build these modules for over 25 
> years, so I 
> >>>>>> get to explore a whole new analog approach again.
> >>>>>>
> >>>>>>
> >>>>>> I will not use the Grey Market SSM's if I can help it, but 
> >>>>>> Rochester Electronics seem to have SSMSSM 2014/ 
> SSM2018, SSM2122 devices.
> >>>>>>
> >>>>>> Any thoughts?
> >>>>>>
> >>>>>>
> >>>>>> Terry Shultz
> >>>>>> thx1138 at earthlink.net
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> _______________________________________________
> >>>>>> Synth-diy mailing list
> >>>>>> Synth-diy at dropmix.xs4all.nl
> >>>>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Nate King
> >>>>> Paper Products Music
> >>>>> _______________________________________________
> >>>>> Synth-diy mailing list
> >>>>> Synth-diy at dropmix.xs4all.nl
> >>>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> >>> _______________________________________________
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> >>
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