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Introduction

This is the User Manual for the Classic VCA 5U module from Oakley Sound. This document 
contains an overview of the operation of the unit and the calibration procedure

For the Builder's Guide, which contains a basic introduction to the board, a full parts list for 
the components needed to populate the board or boards, and a list of the various 
interconnections, please visit the main project webpage at:

http://www.oakleysound.com/5uvca.htm

For general information regarding where to get parts and suggested part numbers please see 
our useful Parts Guide at the project webpage or http://www.oakleysound.com/parts.pdf.

For general information on how to build our modules, including circuit board population, 
mounting front panel components and making up board interconnects please see our generic 
Construction Guide at the project webpage or http://www.oakleysound.com/construct.pdf.

The issue 1 Oakley Classic VCA module behind a natural finish 1U wide Schaeffer panel.

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Summary of Contents for Classic VCA

Page 1: ...Oakley Sound Systems 5U Oakley Modular Series Classic VCA Discrete VCA PCB Issue 1 User Manual V1 1 Tony Allgood Oakley Sound Systems CARLISLE United Kingdom...

Page 2: ...The suggested front panel design for the 5U high MOTM format 2...

Page 3: ...he main project webpage at http www oakleysound com 5uvca htm For general information regarding where to get parts and suggested part numbers please see our useful Parts Guide at the project webpage o...

Page 4: ...input CV2 can be operated in either exponential or linear mode CV2 features a reversible attenuator When the pot is turned right of its central position the pot acts as a normal attenuator increasing...

Page 5: ...y Classic VCA features two input signals IN1 DC and IN2 AC and each has its own level control In this way the Classic VCA can be used to mix or sum two signals together before they are processed by th...

Page 6: ...increase the gain proportionately However it should be noted that the output signal level of the VCA cannot exceed 12 5V or so This upper output limit is restricted by the power supply rails of the m...

Page 7: ...lthough screening is maintained It s worth filling the empty holes of the PWR pads with solder Power connections Synthesizers com The PWR power socket is to be fitted if you are using the module with...

Page 8: ...the output of OUT B on your monitoring system You should hear a slight bleedthrough of the triangle wave input Now adjust LIN until the signal level decreases to its minimum You may have to turn up t...

Page 9: ...e a comment about this user manual or have a found a mistake in it then please do let me know Last but not least can I say a big thank you to all of you who helped and inspired me Thanks especially to...

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