Wednesday, 27 February 2019

Mogue mixer & VCA - NLC build notes

My build notes for the Nonlinear circuits Mogue.


MOGUE is a VCA and Mixer inspired by early Moog designs... The mixer section was inspired by the Moog CP3
 

Andrew has made some changes to get the outputs into +/-5V range and for using easily available components.

The old Moog schematics:




The LM394N
Bipolar Transistors - BJT 
https://au.mouser.com/ProductDetail/Texas-Instruments/LM394N?qs=czFRc4EZNJgyK3N2awTVPQ%3D%3D

Another option are SSM2210s
The SSM221s & LM394Ns are matched NPN transistors. They are both obsolete.
One option is to replace these with Russian Clones: AS394 matched transistors.
Or you can try your luck with the Chinese ones on ebay.
I'm going to try using two BC547's first.
Transistor Matching
-----------------



Used this;
771-BCM857DS-T/R 
orientation ??? the dot marks pin 1 ???
I'm not sure of the correct orientation.
I think the dot marks pin 1

 Tayda



Links
+ NLC blog
+ official build notes & BOM
+ FB builders
 
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3 comments:

  1. Did it work OK? I had a version of BCM857 that was too small for the footprint, so the VCA part didn't work. About to order the part # you used if it worked.

    ReplyDelete
    Replies
    1. I havent finished it yet.
      Im still waiting on parts from Europe.

      Delete
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