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

Homemade Serge

Simple pattern on my big serge-a-like modular ,few years ago ,before i sold it to pieces ,here using 2 x VCS ,a VC ADSR ,SSG and 73 VCF by Serge

 

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 .

'96

 I have a suitcase full of bones from a highschooler that badly wanted a sampler . and a day comes once and again that i take the suitcase from under the bed ,take the bones out and drum as if i wanna bring him back to life ,or tell my fortune .Like someone the other day did cut down half a forest to build half a room .

 

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Lexicon LXP15

 

Lexicon LXP15 V2 for Sale 

I don't use it enough to keep it and i'm trying to save money for some kind of Sampler/Groovebox.

I replaced the caps on it's PSU ,and replaced the rotary encoder that usually breaks with these machines . Can ship worldwide with UPS ,Payment with Pay Pal , Price for the machine is 150EU + shipping.

Contact : vladribarski@gmail.com

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

......ooOOOOOOOooo

 

Gyrator Bandpass Filters 

Frequency Shifter

  This is yet another untested layout . I made the boards for this and even collected the parts ,but have not completed yet . I found this schematic at Henry's Electronics web page . There is not much information on line other then that sadly as well as no other reported builds . The frequency shifter there contains also a Sine/Cosine VCO and i decided to use another Quadrature VCO for this purpose ,so in that sense this is uncomplete . I made two layouts ,that is for the Dome Filter and the Ring Modulators & Summing Mixer .One of the boards is double layer ,while the Ring Mods board is single layer with a number of jumpers .Normally you would want to match the caps in the Dome filter as closely as you can .This is set up in such way that you would use the +/- 5V from the Ring mod board and connect it to Dome filter board ,other than that both boards are connected normally to +/-15V

 

links to original post and gerbers here : https://synthesizerunderconstruction.blogspot.com/2024/12/frequency-shifter.html

links to original project by interesting henry's electronics : https://www.interestingelectronics.com/old/henrys_interesting_electronics/henrys_exciting_electronics_contents.htm

Something i built ..

 Little gallery of the pedals i built recently ..

Christine Fuzz by Tone God 

Culture Jam Triton Delay and Fred Briggs '64 Vox Tones OD

Mad Box Blend with 99DSP Effects from AliExpress and EH LPB 

XR2206 Ring Modulator based on design by Osamu Hoshuyama

Zvex Fuzz Factory 

Loud

 

Mosaics for Solo Media Player

This is recorded using VLC Media Player set to shuffle the playlists ,there are 3 short playlists here made from a Sample Bank i made from earlier recordings . I called this project originally Eden but these are Mosaics formed with individual sounds ,i avoided composing using these sounds and instead used the Shuffle function of a media player ,the results vary ,but sometimes the sounds pile up fine .Many sounds left unused and one or two are repeated .All bets in is cut out from a larger recording of a shuffled playlist where i used all the sounds from the Sample Bank while Setup is a playlist that i created using a limited number of samples .You can find this on Bandcamp here : https://vladoshribski.bandcamp.com/album/mosaics-for-solo-media-player enjoy !