AM303 VC Low Pass Filter

8 HP|AM303 24dB Low Pass FIlter|User Manual (PDF)|ModularGrid|You Tube

 

This is recreation of the PPG 303 24dB low pass voltage controlled filter fom 1976. The design has been reverse enginereed from photographs of the actual PPG filter. It is a traditional Mini Moog style ladder filter with 2% PPS capacitors in the transistor ladder and buffers.

 

The module is designed to be used in any Eurorack system, with an attractive 8HP panel width and the high quality components. 

The AM303 delivers a superb sound with resonance down to low frequencies and a clarity of audio when in self oscillation. It complements the 904A sound very well and is available with  with an etched black panel and silver lettering.

 

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CONTROLS There are three high quality pots for:

 

• • Regeneration - adjusts the resonancel
  • Cutoff Freq - adjusts the frequency cutoff
  • C1 Attenuation - attentuation of control signal 1

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CONNECTIONS There are five 3.5 mm jack sockets on the base of the front panel:

 

• • 1x audio input
  • 1x audio output
  • 3x frequency control CV inputs

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COLOURS The AM303 comes in two knobs colors, depending on whether is suitable for MOOG or Eurorack levels:

 

• • MAGENTA - Moog oscilators (2V) and Env Gens (7.5v)
  • ORANGE - Oscillators (10V) and Env Gens (10V)

 

Please order the correct type. 

 

PRODUCT STATUS: DEVELOPMENT WITH RELEASE DATE IN THE AUTUMN