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VCA
BLACET RESEARCH MODEL VCA2200
Quad Voltage Controlled Amplifier/Mixer Module
User Manual
Blacet Research 15210 Orchard Rd Guerneville CA 95446
blacet@blacet.com http://www.blacet.com
707-869-9164
Contents Copyright.
Reproduction by any means including the Internet prohibited without permission.
This document contains proprietary and trade secret information of Blacet Research and is provided
as a service to the module owner. Any unauthorized duplication or transferral may violate trade secret laws.
Contents subject to change without notice.
Page 1
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Summary of Contents for Blacet Research VCA2200
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Page 1: User Manual
Reproduction by any means including the Internet prohibited without permission. This document contains proprietary and trade secret information of Blacet Research and is provided as a service to the module owner. Any unauthorized duplication or transferral may violate trade secret laws. - Page 2 Introduction The VCA2200 is a versatile quad voltage controlled amplifier module with an exponential response curve. A high quality SSM2164 quad VCA IC is used in this unit for lowest noise and distortion. The module is set up as a four input mixer with a VCA on each input. A Bias pot normals a CV to each VCA unless a plug is inserted into the CV input for that channel.
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Page 3: Controls And Operation
Controls and Operation A voltage controlled amplifier is a pretty simple thing. Actually, the “amplifier” bit is a misnomer because you don’t really amplify anything. You typically get out only what you put in (unity gain) at maximum control voltage. (The 2200 does have one channel with a 10X gain stage preceding the VCA.) So, a better name for this device is “Voltage Controlled Attenuator”... - Page 4 Another use for VCA “D” takes advantage of it’s 10X gain. External signals from keyboards, etc. can be brought up to modular synth levels for use with the Final Filtre, Time Machine, Mini Wave, etc. Stereo panning is easy to do with the addition of the Blacet EG1 VC ADSR module since it has an inverted output available.
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Page 5: Specifications
Specifications Front Panel Size: 5.25 x 3" W Module Depth: 6” Input/Output Jacks: 3.5 mm (1/8”) Amplitude Voltage Control: exponential; 100mV/dB. Frequency Range: 0 to 20 KHz CV Range: 0-10V Output Level: +/-13.5V max Power: +/-15 Vdc @+29/-29 mA Calibration Place the “Bias”... - Page 6 5.5” 1.5 3X Page 6...
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