[sdiy] Quad VCA design

[cheater00 .]

Don't worry, Terry has a lot you can read about him in the archives!

Cheers,
D.

On Wed, May 15, 2013 at 9:10 PM, Dave Manley <dlmanley at sonic.net> wrote:
> Thanks for the info.  Another list member mentioned google and "ron dow ssm" does turn up some interesting articles.  Always cool to read about the pioneers of integrated analog synthesizers.
>
> -------- Original Message --------
>  From: Terry Shultz <thx1138 at earthlink.net>
>  Sent: Wed, May 15, 2013 11:16 AM
>  To: Dave Manley <dlmanley at sonic.net>
>  CC: synth-diy <synth-diy at dropmix.xs4all.nl>
>  Subject: Re: [sdiy] Quad VCA design
>
>>Hi Dave,
>>
>>Ron Dow designed a good deal of the early SSM devices when I worked at e-mu back in the late 1970's to 1984.  PMI bought out ssmt and adi bought out pmi. Precision monolithics inc.
>>
>>Ron, Dan parks , Dave rossum and I were all working on emulator, audity, drumulator and the last of the modular e-mu products.
>>
>>Best regards,
>>
>>Terry
>>
>>Sent from my iPad
>>
>>On May 15, 2013, at 11:03 AM, Dave Manley <dlmanley at sonic.net> wrote:
>>
>>> 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
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> Synth-diy mailing list
>>>>>>>>>>> Synth-diy at dropmix.xs4all.nl
>>>>>>>>>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Nate King
>>>>>>>>>> Paper Products Music
>>>>>>>>>> _______________________________________________
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>>>>>>>> Synth-diy mailing list
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>>>>>>>
>>>>>>> --
>>>>>>> BugBrand LTD
>>>>>>> UK company No. 07199808
>>>>>>> VAT No. GB 988 2629 57
>>>>>>> 1 Ninetree Hill
>>>>>>> BRISTOL BS1 3SB
>>>>>>> United Kingdom
>>>>>>> www.bugbrand.co.uk
>>>>>>>
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