[sdiy] Coolaudio VCAs: V2162 noisier than V2164?

[Chris Juried]

Dave,
What type of virus? I must let my webhost know immediately. Thank you, in advance.
 Sincerely,   
  Chris Juried  
Audio Engineering Society (AES) Member  
InfoComm-Recognized AV Technologist
http://www.JuriedEngineering.com (Juried Engineering, LLC.)
http://www.TubeEquipment.com (Tube Equipment Corporation)
http://www.HistoryOfRecording.com (History of Recording)


      From: Dave Magnuson <abide at dmdrafting.com>
 To: 'Chris Juried' <cjuried at yahoo.com>; 'Mattias Rickardsson' <mr at analogue.org>; 'synthdiy diy' <synth-diy at dropmix.xs4all.nl> 
 Sent: Monday, December 21, 2015 12:19 PM
 Subject: RE: [sdiy] Coolaudio VCAs: V2162 noisier than V2164?
   
#yiv6500111908 #yiv6500111908 -- _filtered #yiv6500111908 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv6500111908 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv6500111908 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} _filtered #yiv6500111908 {font-family:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;} _filtered #yiv6500111908 {font-family:Verdana;panose-1:2 11 6 4 3 5 4 4 2 4;}#yiv6500111908 #yiv6500111908 p.yiv6500111908MsoNormal, #yiv6500111908 li.yiv6500111908MsoNormal, #yiv6500111908 div.yiv6500111908MsoNormal {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;}#yiv6500111908 a:link, #yiv6500111908 span.yiv6500111908MsoHyperlink {color:blue;text-decoration:underline;}#yiv6500111908 a:visited, #yiv6500111908 span.yiv6500111908MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv6500111908 p.yiv6500111908MsoAcetate, #yiv6500111908 li.yiv6500111908MsoAcetate, #yiv6500111908 div.yiv6500111908MsoAcetate {margin:0in;margin-bottom:.0001pt;font-size:8.0pt;}#yiv6500111908 span.yiv6500111908postbody {}#yiv6500111908 span.yiv6500111908EmailStyle19 {color:#1F497D;}#yiv6500111908 span.yiv6500111908BalloonTextChar {}#yiv6500111908 .yiv6500111908MsoChpDefault {font-size:10.0pt;} _filtered #yiv6500111908 {margin:1.0in 1.0in 1.0in 1.0in;}#yiv6500111908 div.yiv6500111908WordSection1 {}#yiv6500111908 VIRUS WARNING  Hi List,  I just got a “threat ware” virus from the History of Recording link in Chris’ signature.   I was looking at the history of Trident Consoles and got nailed  BEWARE  Dave Magnuson  From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Chris Juried
Sent: Monday, December 21, 2015 11:41 AM
To: Mattias Rickardsson; synthdiy diy
Subject: Re: [sdiy] Coolaudio VCAs: V2162 noisier than V2164?  Hi Mattias,  What instrument(s) are you using for you SNR measurements?  Sincerely,   
  Chris Juried  
Audio Engineering Society (AES) Member  
InfoComm-Recognized AV Technologist
http://www.JuriedEngineering.com (Juried Engineering, LLC.)
http://www.TubeEquipment.com (Tube Equipment Corporation)
http://www.HistoryOfRecording.com (History of Recording)    From: Mattias Rickardsson <mr at analogue.org>
To: synthdiy diy <synth-diy at dropmix.xs4all.nl> 
Sent: Monday, December 21, 2015 10:21 AM
Subject: [sdiy] Coolaudio VCAs: V2162 noisier than V2164?
Hi there VCA lovers,

I've done some measurements of SNR & THD of the 2164 and 2162 VCA ICs
from Coolaudio, and I'm very surprised with the noise results I'm
getting. With the 2162 I cannot reach a SNR over 95 dB before
clipping, at any gain. With the 2164 at gain=1 I reach 120 dB SNR.
That's a huge difference!

When trimmed properly the 2162 does have slightly better THD, but the
noise seems to always be there in the background. I hope my
measurements are correct... the "-97 dBV" noise spec in the V2164
datasheet seems a bit odd to me compared to the "-94 dBu" in the V2164
dataheet - or I've misunderstood them.

Has anyone else tried the 2162 (either from THAT or from Coolaudio)
and compared it to the 2164 or other VCAs?

/mr
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