Erica Synths Polivoks VCA II Bedienungsanleitung

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GUIDE TO ASSEMBLY OF ERICA SYNTHS POLIVOKS-INSPIRED VCA

If you are reading this, most probably, you are about to build Erica

Synths DIY Polivoks-inspired VCA. This module is 35mm deep, skiff

friendly, has solid mechanical construction and doesn’t require

wiring. The PolivoksVCA has distinctive architecture –two

differential opamp(Russian ICs K118UD1B) based VCAs in series

each for LFO and ADSR control over signal amplitude

independently. Control voltage to attenuation behaviorof this VCA

is nonlinear and not logarithmic. It is kept authentic to the

response of ПОЛИВОКС, and it uses same differential opamps, as

used in the original ПОЛИВОКС. Most parts of the VCA have been

improved to achieve compatibility with euroracksignal and CV

standards, higher dynamic range, better reliability, lower noise,

accept higher signal levels, keep consistent behaviour, self-tuning

of two internal offsets and higher linearity, though the heart of it is

kept the same. Also we redesigned audio signal path, so that you

can use it as two independent VCAs or two VCAs in series as in

original Polivoks, plus summed signal output.

The DIY Envelope kit comes in three versions:

1)2PCBs + 2xK188UD1 ICs + connectors,

2)2PCBs + 2xK188UD1 ICs + connectors + panel,

3) Full kit.

FEATURES:

•Single or Dual VCA mode

•CV level adjustment for each VCA

•Summed audio output (lower signal gain, though)

•Skiff-friendly design

SPECIFICATIONS:

•VCA gain1,2

•CV level-10V…+10V

•Attenuation@0V CV80dB

•Panel width8HP

•Module depth35mm

•Power consumption24mA@+12V, 18mA@-12V

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Adjust CV attenuation level for the first VCA! It

also sets VCA bias. If you use VCAs in series and

no CV is applied to CV1 IN, you must turn CV1

LEVEL knob all way CW to open the first stage.

Switch between single or dual VCA modes.

These are CV inputs.

These are audio signal inputs.

These are audio outputs. On MIX OUT you get

mixed signal from both VCAs in dual mode. It’s

bonus feature, but signal level will be than on

regular outputs.

Adjust CV attenuation level for the second

VCA! It also sets VCA bias.

Produktspezifikationen