This Module is currently available.
Triple VCA
The AM1042 is a 14HP module that re-imagines the "lost" ARP module of the 2500 modular synthesizer. Prototypes of the original appeared in 1970 but the module never made it into production. The AMSynths module fills in a gap of synthesizer history for Eurorack. The module has three transistor voltage controlled amplifiers each with a single DC coupled input.
DESCRIPTION Each of the three channels is based on the discrete transistor VCA sub module (4014) in the original ARP 2500 and 2600. The DC signal inputs is mixed into each VCA, with two external CV signal inputs and a GAIN potentiometer controlling the output signal level.
The input of the second and third VCA are normalised to the signal input of the first VCA, to enable parallel VCA operation from one signal.
The response mode of each VCA can be set as linear or exponential. We did investigate whether a continuously variable response rate was useful but it made no significant difference apart from creating a -6dB gain loss in mid position.
The gain of the VCA is adjusted with the main rotary potentiometer or by the modulation input (MOD) or by the CV input (CV) with depth potentiometer.
High quality Alpha potentiometers and Rogan knobs have been used to ensure control voltages can be easily set and adjusted.
CONNECTIONS There are four 3.5 mm jack sockets for each VCA channel :
Input - audio signal input (10V p-t-p) which is DC coupled
Mod Input - control voltage (0 to +10V) to control the gain of the VCA
CV Input - control voltage (0 to +10V) to control the gain of the VCA
Output - Audio signal output
The module comes with a set of M3 mounting screws and washers, and a standard Doepfer power cable.
These merchants probably sell this module. Huh?
