flight of harmony V ’Amp Eurorack Module ~rev1.
V’A mp Mod 1 Mod 2 Offset Input Output Env in Audio in Mod1 Mod2 f(h) Output Components 1 Assembled V’Amp module 1 DC power cable – 9” Ribbon cable (Doepfer standard) 2 M3x0.5x5mm Stainless-Steel machine screws 2 M3 Nylon washers Specifications 8 h.p. Module width Supply Voltage Supply Current 1 ±12VDC1 IV+= 33mA (max draw @ ±12V) IV-= -11mA Max. Input Voltage (@ ±12V) 10Vp-p Max. Output Voltage 12Vp-p Input & Output (I/O) coupling A.C.
What is it? The V’Amp is a combined voltage-controlled amplifier (VCA) and ring modulator (A.K.A. ring “mod”), with a little bit extra. The effect of a VCA is known as amplitude modulation (AM), while a ring mod is a frequency mixer, an effect known as heterodyning. Heterodyning takes two frequencies –– traditionally known as the “carrier” and the “modulator” –– and mixes them, producing the frequencies that are sum and difference of these two at the output, i.e.
Controls Mod1: This is the magic knob, controlling the Mod 1 Mod frequency mixing as described in the introduction. 2 Mod1 varies the amount that the Mod1 signal modulates the input signal, as well as controlling the polarity of the output: positive from 7:00 to 12:00, negative from 12:00 to 5:00. Offset fig.1 Input Output control. Mod2: This is the Mod2 input attenuator Offset: Think of this as an internal gain control.
Other connections Power: The power connector header is a 2x5 shrouded box header which accepts the standard Doepfer power cable. This header style is polarized, meaning the connector can only be inserted one way, to prevent connecting the power backwards and damaging the unit. This assumes that you are using either the supplied cable or one manufactured by Doepfer. Looking at the rear of the module, the negative supply (red stripe) is on the left, positive supply is on the right (see fig.2). fig.
HDR2, top to bottom: Mod1P2 Mod1 potentiometer wiper Mod1In Mod1 Jack signal Mod1P3 Mod1 potentiometer terminal 3 (fully CW) Mod1P1 Mod1 potentiometer terminal 1 (fully CCW) GND Common ground AudioIn Audio input jack signal EnvIn Envelope input jack signal HDR1, top to bottom: Mod2P2 Mod2 potentiometer wiper OffsetP2 Offset potentiometer wiper GND Common ground OutLevP3 Output potentiometer terminal 3 (fully CW) OutLevP2 Output potentiometer wiper Audio Out To output jack Offs
Stuff There is a lot of discussion about the V’Amp on the Muffwiggler forums, come check it out! People have posted some excellent demos on there. I haunt the forums as well, and new things are posted there long before they hit the f(h) website. http://www.muffwiggler.com/forum/index.php A big thank you to those who have sent in suggestions and comments, keep them coming! Send samples to: samples@flightofharmony.com Comments, suggestions, complaints to: flight@flightofharmony.
