Module A-183-3 is a simple amplifier. It is DC coupled and can be used for both CV and audio signals. The maximal amplification can be switched between 1, 2 and 4 (in position 1 the module does not work as a real amplifier but only as attenuator).
The level can be adjusted by means of the Level control between zero and the chosen maximim amplification (1/2/4). Two overload LEDs indicate if the output signal goes beyond about +10V or becomes less than about -10V. Input and output are equipped with miniature 2-fold multiples (nothing but 2 connected sockets).
The main application of this module is to adapt differing audio or CV levels between different modules or systems. For example LFO, ADSR or Gate levels between modules of different manufacturers can be increased or attenuated. But even audio signals can be attenuated or amplified up to 4. But the module cannot be used as an amplifer for external low level audio signals (e.g. microphones or electric guitars)!
Technical note
The module can be modified for other maximal amplification values. There are two resistors on the pc board that define the amplifications for the left (x2) and right (x4) position of the switch: the resistor located next to the level control (R3, factory value 10k) defines the x2 amplification. The resistor located near to the switch (R4, factory value 3k3) defines the x4 amplification. The formula for the amplification is 1+10k/Rx (Rx is the resistor in question, for 10k the result is 2, for 3k3 the result is 4). If Rx is e.g. 1k4 the max. amplification becomes 1+10/1.4 = 8.
Pay attention that the warranty is void when the module is modified by the user.
- Width: 4HP
- Depth: 20mm (measured from the rear side of the front panel)
- Current: +20mA (+12V) / -10mA (-12V)
Product Overview
Module A-183-3 is a simple amplifier. It is DC coupled and can be used for both CV and audio signals. The maximal amplification can be switched between 1, 2 and 4 (in position 1 the module does not work as a real amplifier but only as attenuator).
The level can be adjusted by means of the Level control between zero and the chosen maximim amplification (1/2/4). Two overload LEDs indicate if the output signal goes beyond about +10V or becomes less than about -10V. Input and output are equipped with miniature 2-fold multiples (nothing but 2 connected sockets).
The main application of this module is to adapt differing audio or CV levels between different modules or systems. For example LFO, ADSR or Gate levels between modules of different manufacturers can be increased or attenuated. But even audio signals can be attenuated or amplified up to 4. But the module cannot be used as an amplifer for external low level audio signals (e.g. microphones or electric guitars)!
Technical note
The module can be modified for other maximal amplification values. There are two resistors on the pc board that define the amplifications for the left (x2) and right (x4) position of the switch: the resistor located next to the level control (R3, factory value 10k) defines the x2 amplification. The resistor located near to the switch (R4, factory value 3k3) defines the x4 amplification. The formula for the amplification is 1+10k/Rx (Rx is the resistor in question, for 10k the result is 2, for 3k3 the result is 4). If Rx is e.g. 1k4 the max. amplification becomes 1+10/1.4 = 8.
Pay attention that the warranty is void when the module is modified by the user.
