Dual Voltage Controlled VCA/Polarizer/Inverter/Ring Modulator

€90.00 *
Net price: €77.59

Prices incl. VAT plus shipping costs

In stock

  • 200207
  • 40
Module A-133-2 can be used for a lot of applications: as a simple VCA, or a voltage controlled... more
Product information "Dual Voltage Controlled VCA/Polarizer/Inverter/Ring Modulator"

A-133-2 is the slim version of the A-133 but has some additional features and improvements available compared to the A-133.

Module A-133-2 can be used for a lot of applications: as a simple VCA, or a voltage controlled polarizer/attuverter, or a voltage controlled inverter up to a DC coupled ring modulator. In principle the module contains two special voltage controlled amplifiers (VCAs) that allow both positive and negative amplification. The overall amplification is definded by the sum of the voltage generated by the Man control, the external control voltage CV and the position of the CV control which works as an attenuator for the external control voltage. Without external CV the amplification is +1 when the Man control is fully CW. In the center position the amplification is zero and fully CCW it's -1 (i.e. the incoming signal is inverted). By means of the external control voltage CV the manually adjusted amplification can be modulated. CV can be both positive or negative (i.e. bipolar) to obtain positive or negative amplification values controlled by the external CV. In addition the CV signal can be modulated via the modulation control input Mod by means of another control voltage. The Mod socket is normalled to +5V, i.e. a constant positive voltage is used as modulation CV provided that no plug is inserted into the Mod socket. The control voltage range for this socket is bipolar and can be adjusted to the user's requirements by means of a trimming potentiometer. The factory setting is -5V...+5V (i.e. -5V no modulation, 0V about 50% modulation, +5V full modulation). The current amplification is displayed by a dual color LED. It's not a signal display but indicates the amplification (yellow = positive amplification, red = negative amplification)

HE: 3
TE: 4
Depth: 40
Power consumption +12V: 20
Power consumption -12V: 20
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Here is the information available on the brand...... more
Doepfer Musikelektronik GmbH

WIth a long trajectory building synths, MIDI keyboards and designing bespoke devices for music pioneers Kraftwerk, Dieter Doepfer decided to design his own modular synthesizer in 1995 based on existing electrical and mechanical specifications of lab equipment he used during his years at university. The official presentation of the system at 1996 Frankfurt Musikmesse caught everyone by surprise and created lots of interest. After Doepfer published the specifications on his website, many instrument designers and engineers saw the potential of the new Eurorack format. Doepfer continues expanding their catalog of over 200 modules (and counting), operating from their modest offices in the outskirts of Munich.

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