[sdiy] Help with noisy VCA

[Synthcube]

We bought some of the cabin tech R version and had no issues with performance, just the reversed pin notation. Thought we had heard they would be back in stock late October at coolaudio 

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> On Aug 31, 2017, at 6:02 PM, Guy McCusker <guy.mccusker at gmail.com> wrote:
> 
> Hmm, I wonder if the disappearance of the SMD 2164s from the CoolAudio
> site has anything to do with their recent manufacturing error. As I
> understand it, a batch of 2164s was produced with the die rotated 180
> degrees inside the package, so the indentation indicated pin 9 rather
> than pin 1, which more or less guarantees the death of the IC if you
> don't know about it and apply power. CabinTech sells these as
> V2164M-R.
> 
> @Paula, can you provide a link for the Modulus e-zine please? I have
> searched a bit and come up blank.
> 
>> On Thu, Aug 31, 2017 at 10:50 PM, Neil Johnson <neil.johnson71 at gmail.com> wrote:
>> Tim,
>> 
>> Who did you ask?
>> 
>> Analog Devices stopped making SSM2164 years ago.  The only
>> manufacturer currently selling them is CoolAudio (part of
>> Behringer/Music-Group) in the guise of the V2164, which is available
>> in both PTH and SMT.....
>> 
>> Oooh wait, no, you're right .... bloody hell.... they only list the
>> DIP-16 package variant, which would be the V2164D.
>> 
>> Hmmm... I wonder why they stopped advertising the SMT version online?
>> Could it be just a slip-up?  Or are Behringer trying to kill off
>> Eurorack competition?  *ouch*
>> 
>> For small quantities you might find local distributors like Small Bear
>> and Cabin Tech have what you need.
>> 
>> Neil
>> 
>> 
>> 
>> 
>> 
>>> On 31 August 2017 at 22:28, Tim Ressel <timr at circuitabbey.com> wrote:
>>> Their website shows PTH but not SMT. I've got an email in to tehm.
>>> 
>>> --TImbo
>>> 
>>> 
>>> 
>>>> On 8/31/2017 2:26 PM, Mrs Paula Anne Maddox wrote:
>>>> 
>>>> Tim,
>>>> 
>>>> You can get any 2164s from cool audio.
>>>> As for the vca, I'd suggest the Gilbert multiplier based one, check
>>>> modulus ezine 5 (it's on the web) for a schematic. You don't need a 3046 as
>>>> long as you have two matches pairs, but you can get the 3046 in smt still.
>>>> 
>>>> Paula
>>>> 
>>>> On 31 August 2017, at 22:17, Tim Ressel <timr at circuitabbey.com> wrote:
>>>> 
>>>> Hi,
>>>> 
>>>> I am still having trouble with this VCA design:
>>>> 
>>>> https://drive.google.com/open?id=0B2yaoNYlV1nMWFhSRWUwdlU3TzQ
>>>> 
>>>> It is noisy, and it gets worse as you turn up the gain. I tried
>>>> switching to a 2164 design but its no longer available in SMT.
>>>> 
>>>> Any ides?
>>>> 
>>> 
>>> --
>>> --Tim Ressel
>>> Circuit Abbey
>>> timr at circuitabbey.com
>>> 
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>> 
>> 
>> 
>> --
>> http://www.njohnson.co.uk
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