God’s Box ‘Humpback’ Filter. Panel/PCB Set

From: £25.00

EU Price  does not include EU VAT.

A Panel/PCB set for a 2-pole multimode filter reminiscent of the classic ‘SEM’ style state variable VCF. Special features include a hot rodded resonance circuit and increased frequency range.

ADD THE TWO CA3080 IC CHIPS AND SILVER MICA CAPS REQUIRED BY TICKING THE BOX BELOW!

Rochester - CA3080AE IC - Reissued OTA Chip × 2 – optional

In stock

220pf Caps x2 (Silver Mica) – optional

In stock

Matched Pair of 2N3906 transistors – optional

In stock

Description

hump_34The God’s Box ‘Humpback’ DIY module is produced exclusively in collaboration with Thonk.

The module is 8hp wide and is skiff friendly; 38mm deep.

Contents

  • Aluminium 8hp Eurorack panel – High Quality two colour Aluprint process
  • Red PCBs with ENIG gold traces

Description

The Humpback multimode voltage controlled filter is a 2-pole, CA3080 based implementation of the classic state variable architecture. The controls of the filter are as follows:

  • Filter cutoff – a hardwired DC voltage frequency control
  • CV inputs – two frequency CV inputs are included on the panel and controlled by attenutators.
  • Outputs – lowpass, bandpass, highpass and notch are available simultaneously
  • Signal input – one signal input is available on the panel
  • Resonance-resonance control is included and is hot-rodded to allow self-oscillation. In self oscillation the filter will produce a sine wave output.

Build Documentation

BUILD DOC, SCHEMATICS, BOMhttps://thonk.co.uk/documents/gbox/humpback/ 

Muffwiggler Build thread – https://www.muffwiggler.com/forum/viewtopic.php?p=1949692

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