EMU (Universal Active Filter)

 

please contact me if i need to remove this as i don't remember where i found this really elaborate schematic from the Emu Modular 

in case you missed this...

 

   

Serge '73 VCF ,original layout from Serge ,using 2 x CA3080 , i cleaned up this layout to my taste and build this filter using this ..twice ,little tip : if you're using this layout and don't have a metal can CA3080 you can use that chip in SMD with adapter ,using CA3080 in TH can be hard ,this one and few other original layouts from that Serge system can still be found at the wayback machine . Here is Gerber files for this interesting filter , you can see i did not completed the silkscreen since the original documentation contained that information .

This information was already online ,contact me if i need to remove it from this google website .

preslusaj i promotaj i skrati

 This is recorded with a homemade mixer and few homemade ring modulators

https://vladoshribski.bandcamp.com/album/loud

Bandpass Gyrator Filters or almost an Octave filter

 

Bandpass Gyrator Filters or almost an Octave filter as presented by helge-h here at electro-music forum

i made 4 of these filters as part of my Matrix Mixer ,too bad that more then 6 position switches are really expensive ,but that is the only extra thing you need to expand this filter , i installed the capacitors on the switches as that makes sense to me

Orban 674

 

I started obsessing with this EQ when i found the schematics . Really something to DIY .This is a Gyrator based Para-Graphic EQ by Orban ,Good thing 4 pin potentiometers are still available until they are .Too bad i'm not as enthusiastic about building more gear ,this is deff something i'd try to make. Make as in Make-donija .

SynthesizerUnderConstruction

 Here are links to my other blog . These are all tested working layouts . If you can buy the kit ,it's easier but if you have a few spare parts and need a specific project maybe it's here : SynthesizerSecrets 

SIAM (Siemens Inspired Equalizer )

Preamp and Envelope Follower ( By Juan Bermudes Costa)

Thomas Henry 555 VCO (Slim Version)

Crossfade Panner (Buchla Based)

Experimental Hardware Neurons (By Grant Richter)

Non-Linear Circuits Primal Hyperchaos 

Non-Linear Circuits Jerk

Non-Linear Circuits SPasm

NLC Neuron/Grant Richter's CV Twister

CGS95 Reverb

Serge n-Step Programmer/Sequencer

Buchla Low Pass Gate/Envelope Follower

Serge Wavemultiplier/Overdrive 

Paparail's VC AUX

Hagiwo's Addive VCO

Serge SSG/Bazier CUrve

Serge Triple Glide

Buchla 194

Yamaha GX BPF

Matrix Mixer

 

Matrix Mixer with gyrators as presented at electro-music forum ,this matrix mixer is with a twist ..each of the four stages has one input set to go thru the bandpass filter with rotation switches dedicated for purpose of filters set in the left side ,the upper and lower filter have two settings for resonance selectable via switch ,the 2nd and 3rd stage's 2nd and 3rd input have an attenuator switch ,as well as the 4th channel ,there was not enough space but in retrospect i'd add switchable boost on each channel in a form of additional 10 or 15K resistor at the output opamp ,the gyrator filters as expected make nice sinusoidal tones in feedback .This is really an active matrix mixer from CGS schematic ,each row can be set to unipolar or bipolar mixing and can be used for audio or cv mixing .

----- NOW THIS MATRIX MIXER IS NO LONGER FOR SALE -----

This unique Matrix Mixer with 4 Filters is for sale for 150EU + Shipping ,it works on +/-15V or +/-12V, i can include external PSU if you don't have one already but that might increase shipping costs , can ship worldwide with UPS ,payment with Pay Pal ,contact me for more info on vladribarski@gmail.com

Active Processor

UNTESTED!

 

Serge Triple Glide

 

tested , working!

building best of cgs

 

ↀ

 

◉

Sparrows

way way back when i was skinny

NLC Spasm

 

verified working

194+

 

i always wondered how come no one moded 194 to make it 6 bands ,so i added 2 more bands from ian fritz's filter bank from electronotes ,as it's also transistor based , in the end i added 1 stage from 106 mixer to have panel controls for the mini filter bank

EEE______

 

SWAMP

 

Best of CGS

 

Box