flight of harmony V ’Amp Barebones Pack ~rev1.
1 fig.1 fig.2 Components 1 Assembled V’Amp main PCB 1 DC power connector – MTA156 4-pin (standard) 2 Panel connectors – MTA100 7-pin 1 B10k potentiometer + washer & panel nut (Mod1) 4 B100k potentiometers + washers & panel nuts 5 Soft-touch T-18 knobs 5 3.5mm phone jacks + knurled nuts Specifications 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 frequency mixing as described in the introduction. 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. Mod2: This is the Mod2 input attenuator control. Offset: Think of this as an internal gain control.
/9 B100k Input Insert Input Env Insert In Insert Mod1 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
Mechanical template 0.379" 1.208" ø9/32” ø9/32” ø9/32” 0.882" 0.730" 0.578" 0.425" 0.336" 0.248" 0.159" 0.118" 5.059" 4.941" ø9/32” ø0.25” ø9/32” ø0.25” ø0.25” ø0.25” ø0.25” ø0.25” ø0.25” ø0.25” ø0.25” ø0.25” 0.236" 0.295" 0.512" 0.793" 1.074" 1.361" 1.
Graphic template V’A mp Mod 1 Mod 2 Offset Input Env in Audio in Output Mod1 Mod2 f(h) 8/9 Output
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.
