Gotharman EuroBoard MkII User manual

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Gotharman’s EuroBoard MkII
User Manual

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Table of Contents
Overview ..............................................................................................................................................3
Parameters...........................................................................................................................................4
Jumpers................................................................................................................................................6
Installing a Filter Board ........................................................................................................................8
Connecting the Power..........................................................................................................................9
VCF1 Single Filter................................................................................................................................10
VCF2 Dual Filter..................................................................................................................................11
VCF3 Trippple Filter............................................................................................................................12
VCF4 Gotharman’s First .....................................................................................................................13
VCF5 miniProphet ..............................................................................................................................14
VCF6 SP Filter .....................................................................................................................................15
VCF7 Tubaz.........................................................................................................................................16
VCF8 Dual Spaze SSI2144 filter ..........................................................................................................17
VCF9 Xtra Distortion Filter .................................................................................................................18
VCF10 Dual SSI2140 Multimode Filter...............................................................................................19
VCF11 Zaturn Filter ............................................................................................................................20
VCF12 FilterBank................................................................................................................................21
VCF13 Diode Drive Filter ....................................................................................................................22

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Overview
Thank you very much for purchasing/consider to purchase Gotharman’s EuroBoard MkII.
EuroBoard is a eurorack module which can hold one of the analog filter boards, which are
available for Little deformer 3, Tiny LD, Urano, Anamono X and Xmini, for using these filters in a
eurorack system.
Compared to the first EuroBoard module, MkII is smaller (14hp vs 22 hp), and has jumpers added
to set the polarity of each parameter, to make it fit all the different filter boards.

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Parameters
The four main parameters are Cutoff, Cutoff2, Reso and Feed. These parameters might have
different functions on the various filters. This will be explained for each filter board in the
following chapters of this manual.
The Cutoff parameter can be modulated by the CutCV1 and CutCV2 inputs through the
attenuators.
The Cutoff2 parameter can be modulated by the Cut2CV input through the attenuator.
The Reso parameter can be modulated by the Reso CV input through the attenuator.

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The Feed parameter can be modulated by the FeedCV input through the attenuator.
The LPF, BPF and HPF switches are used for switching specific filter outputs on or off, and for
changing filter modes. The functionality of these are explained separately for each filter board in
the following chapters.
If a switch is up, it is off, if it is down, it is on.

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Jumpers
The polarity of the parameters on the various filter boards are not the same. LD3, Urano, Tiny LD
and other instruments sets the polarity of the various parameters, when you select the installed
filter board in the VCF menu.
On EuroBoard MkII you will have to set the polarity of each parameter, using jumpers. The
recommended jumper settings are shown for each filter board in the following chapters of this
manual.
The location of the jumpers:
The Cutoff and Feed jumpers.

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The Reso and Cutoff2 jumpers.
When a jumper is placed on the upper 2 pins, the parameter is normal.
When a jumper is placed on the lower 2 pins, the parameter is inverted.

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Installing a Filter Board
Place EuroBoard MkII on a surface, with its front facing downwards.
Check the chapter in this manual, for the filter board that you will install, and set the jumpers to
the recommended settings.
Place the filter board with the electronic parts facing upwards, into the filter board connector.
Insert and tighten the vinyl screw that came with EuroBoard MkII, into the filter board hole, using
a screwdriver.

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Connecting the Power
Connect the power cable with the brown cable (-12V) facing upwards, if it is a multi-colored cable,
or the red line facing upwards, if it is a grey cable.
Connect the other end of the cable to your eurorack power bus.

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VCF1 Single Filter
Recommended jumper settings:
Parameters:
Cutoff: Cutoff
Cutoff2: Filter block 2 cutoff
Reso: Reso
Feed: Feed
Switches:
LPF: LPF output on/off
BPF: BPF output on/off
HPF: HPF output on/off
Outputs:
1: Filter output
2: Filter output with analog distortion added

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VCF2 Dual Filter
Recommended jumper settings:
Parameters:
Cutoff: Filter 1 (always BPF) Cutoff
Cutoff2: Filter 2 cutoff
Reso: Filter 1 and 2 Reso
Feed: Filter 1 and 2 Feed
Switches:
LPF: Filter 2 LPF output on/off
BPF: Filter 2 BPF output on/off
HPF: Filter 2 HPF output on/off
Outputs:
1: Filter 1 and 2 output
2: Filter 1 and 2 output with analog distortion added

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VCF3 Trippple Filter
Recommended jumper settings:
Parameters:
Cutoff: LPF Filter Cutoff
Cutoff2: BPF Filter cutoff
Reso: LPF, BPF and HPF Filters Reso
Feed: HPF Filter cutoff
Switches:
LPF: LPF filter to output 1 on/off
BPF: BPF filter to output 1 on/off
HPF: HPF filter to output 1 on/off
Outputs:
1: LPF, BPF and HPF filters output
2: All 3 filters as BPF’s output

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VCF4 Gotharman’s First
Recommended jumper settings:
Parameters:
Cutoff: Cutoff
Cutoff2: Filter block 2 cutoff
Reso: Reso
Feed: Feed
Switches:
LPF: LPF output on/off
BPF: BPF output on/off
HPF: HPF output on/off
Outputs:
1: Filter output
2: Filter output with analog distortion added

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VCF5 miniProphet
Recommended jumper settings:
Parameters:
Cutoff: Cutoff
Cutoff2: No function
Reso: Reso
Feed: No function
Switches:
LPF: Out 1 12/24 db
BPF: Out 2 18db on/off
HPF: Out 2 6db on/off
Outputs:
1: 12/24db output
2: 6/18db output. These outputs are inverted, so mixing them with output 1 can create new filter
types!

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VCF6 SP Filter
Recommended jumper settings:
Parameters:
Cutoff: Cutoff
Cutoff2: No function
Reso: Reso
Feed: Sample Rate
Switches:
LPF: 6/12 bits
BPF: No function
HPF: No function
Outputs:
1: Filter output
2: Filter output with added analog fuzz

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VCF7 Tubaz
Recommended jumper settings:
Parameters:
Cutoff: Cutoff
Cutoff2: No function
Reso: Reso
Feed: Feed
Switches:
LPF: Out 1 LPF/BPF
BPF: No function
HPF: No function
Outputs:
1: LPF/BPF output
2: HPF output

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VCF8 Dual Spaze SSI2144 filter
Recommended jumper settings:
Parameters:
Cutoff: HPF 1 and 2 Cutoff
Cutoff2: LPF 1 and 2 Cutoff
Reso: All 4 filters Reso
Feed: Spaze –Spazing between HPF/LPF set 1 and HPF/LPF set 2
Switches:
LPF: HPF 2 LPF/HPF mode
BPF: HPF 1 LPF/HPF mode
HPF: HPF/LPF sets 1 and 2 serial/parallel mode
Outputs:
1: HPF/LPF set 1 output
2: HPF/LPF set 2 output

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VCF9 Xtra Distortion Filter
Recommended jumper settings:
Parameters:
Cutoff: Cutoff
Cutoff2: Analog distortion Drive
Reso: Reso
Feed: Feed
Switches:
LPF: LPF output on/off
BPF: BPF output on/off
HPF: HPF output on/off
Outputs:
1: Filter output
2: Filter output with analog distortion added

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VCF10 Dual SSI2140 Multimode Filter
Recommended jumper settings:
Parameters:
Cutoff: Multi mode filter Cutoff
Cutoff2: BPF filter cutoff
Reso: Multi mode filter Reso
Feed: BPF filter Reso
Switches –Multi mode filter type:
LPF BPF HPF Mode
Off off off LPF 24db
On off off LPF 18db
Off on off LPF 12db
On on off LPF 6db
Off off on BPF
On off on Notch
Off on on HPF
On on on AllPass
Outputs:
1: Multi mode Filter output
2: BPF Filter output

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VCF11 Zaturn Filter
Recommended jumper settings:
Parameters:
Cutoff: Filter 1 Cutoff
Cutoff2: Filter 2 Cutoff
Reso: Filter 1 Reso
Feed: Filter 2 Reso
Switches:
LPF: Filter 1 LPF/BPF mode
BPF: Filter 2 LPF/BPF mode
HPF: No function
Outputs:
1: Filter 1 output
2: Filter 2 output