6..36dB VCF Lowpass/Highpass

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Haralds:Werk
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6..36dB VCF Lowpass/Highpass

Post by Haralds:Werk » Thu Jan 14, 2021 6:20 am

This is the Eurorack version of my NGF 36dB VCF. I have brought out the 6dB, 12dB, 18dB, 24dB, 30dB and 36dB poles. You have two audio inputs for easy mixing sound sources. And CV inputs for linear TM, log TM, envelope, V/Oct tracking and emphasis. The exponential circuit is temperature compensated with KTY81-110. If the 12dB output is patched back to input 2 the filter can serve as a sine oscillator.
Specs and features

36dB voltage controlled low pass and high pass filter
Two inputs for easy mixing
6dB, 12dB, 18dB, 24dB 30dB, 36dB output
HP/LP switch
Positive and negative ENV control with sign changer
Temperature compensation with KTY81-110
CV inputs for linear TM, log TM, envelope, V/Oct tracking and emphasis
Usable as sine oscillator
Runs on +/-12V and +/-15V (with minor resistor value changes for best performance)
Power consumption around 60mA negative rail, 65mA positive rail

The documentation and the Gerber files for download can be found in my website.
VCF_36dB_EB_090_schematic.png
VCF_36dB_EF_101_schematic.png
VCF_36dB_front.JPG
VCF_36dB_control_PCB.JPG
VCF_36dB_main_PCB.JPG
VCF_36dB_half_side.JPG
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www.haraldswerk.de
Home of Next Generation Formant

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KSS
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Re: 6..36dB VCF Lowpass/Highpass

Post by KSS » Thu Jan 14, 2021 6:28 am

:tu:

Quinie
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Re: 6..36dB VCF Lowpass/Highpass

Post by Quinie » Thu Jan 14, 2021 4:14 pm

Sorry Harald pm-ed you, missed this topic
Untested Gerbers for panels
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