[sdiy] Quad VCA design

[Dave Manley]

Terry, who is Ron Dow?  I've not run across his name before.

-------- Original Message --------
 From: Terry Shultz <thx1138 at earthlink.net>
 Sent: Wed, May 15, 2013 10:50 AM
 To: cheater00 . <cheater00 at gmail.com>
 CC: synth-diy <synth-diy at dropmix.xs4all.nl>
 Subject: Re: [sdiy] Quad VCA design

>Well, I try to entertain a little.
>
>Normally, I try not to impress with extensive knowledge. I can learn a lot of new tricks if I listen and don't talk at the same time.
>
>Unfortunately, I have spent too much time in designing chips, and have been passed by newer audio solutions.
>
>Remember, it has been since 1985, since I have done any new synth modules. 
>
>Since then, old friends like Doug Curtis and Ron Dow have passed away and so has many of the products.
>
>Evan Brooks, cofounder of Digidesign contacted me back in March and suggested I re-enter the analog designs again. He feels this market might still have some sales going forward.
>
>We'll see.
>Regards,
>
>Terry
>
>
>Sent from my iPad
>
>On May 15, 2013, at 10:35 AM, "cheater00 ." <cheater00 at gmail.com> wrote:
>
>> Self-destruction! And I thought this thread was going to end up boring ;-)
>> 
>> On Wed, May 15, 2013 at 6:30 PM, David G Dixon <dixon at mail.ubc.ca> wrote:
>>> I have used V2164 in virtually every module I've designed in the last three
>>> years, and it's brilliant.  It has its quirks (you will get very familiar
>>> with the fine print of the datasheet, especially if you try to do
>>> unconventional stuff with it), but it is a solid performer.  Just don't try
>>> to power it up backwards.  Unlike most opamps, it will self-destruct
>>> instantly (as would the SSM2164).
>>> 
>>> 
>>>> http://www.smallbearelec.com/servlet/Detail?no=737 - $3.50
>>>> singles // comes down quickly from there in multiples..
>>>> 
>>>> On 15/05/2013 16:11, Terry Shultz wrote:
>>>>> 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-Co
>>>>>>> ntrolled_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
>>>>>>>> 
>>>>>>>> 
>>>>>>>> 
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>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> --
>>>>>>> Nate King
>>>>>>> Paper Products Music
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>>>> 
>>>> --
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