Zlob TH SVF Kit

Based on the Thomas Henry VCF-1, the TH SVF is a two pole, 12dB state variable filter from Zlob Modular.

This is a full kit set in the Eurorack format.

Availability: In stock




The Zlob Modular T.H. SVF filter does self oscillate at full resonance with no external audio input.  There are two resonance settings selectable by a jumper on the PCB: max resonance produces a trapezoid wave while min resonance(jumper in left/up position) produces an almost sine like waveform. With the newest revision, max resonance is in the up position and trimmed resonance is in the bottom position.

The filter can also be used as an lfo through audio range oscillator, although higher registers experience amplitude/wave shape fluctuations. When self oscillating with an external audio source present, the filter produces pseudo chaotic instabilities which are also dependent on the resonance settings, and overdriving or attenuating the audio ins.

2 Audio ins: In I: AC coupled, In II: DC coupled

2 CV ins: one 1V/OCT matched transistor/temperature compensated in(accepts +/- voltage), and another envelope/exponential cv in with attenuator(accepts +/- voltage).

low pass, band pass, and high pass out

Specs & Downloads

Specs & Downloads

manufacturer Zlob Modular
HP 4
Depth No
+12V 23mA
-12V 13mA
+5V No
Additional Resources Build Guide


Customer Reviews (1)

Pretty good.Review by Some guy
Pretty easy build. Docs are just a series of pics with no description, but it's all pretty simple. A bit of a pop if I bring the cut off pot all the way back. Other than that it's a pretty nice sounding filter and I'm happy with the buy. (Posted on 2/25/2017)

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