Thursday, November 14, 2024

GENERAL RADIO 1952 UNIVERSAL FILTER





According to the manual this is a Fourth Order (Four Pole) Chebishev Filters ,that can be set to Low Pass ,Band Pass ,High Pass and Band Reject . Cut off frequencies are adjustable from 4Hz to 60 kHz in four ranges .Find the complete manual here : https://www.ietlabs.com/pdf/Manuals/GR/GR1952%20IM.pdf




 

Wednesday, November 13, 2024

Ringmodulator Using XR2206. BY OSAMU HOSHUYAMA

 





From the notes on the web site :An amplifier was added so that a guitar or the like can be input. A bias circuit was added so that it becomes just an oscillator when there is no input signal. It also serves as a knob to prevent only the oscillation sound from leaking out when there is no input signal.

I built this on stripboard somewhat modified ,and fitted in old Russian antenna enclosure . 








Thursday, November 7, 2024

krohn-hite_3103a

 



krohn-hite_3103a-4_wide-range_10hz-3mhz_band-pass_filter_1981

bruel-kjaer_1613.1_octave_filter_

 


bruel-kjaer_1613.1_octave_filter_

Tuesday, October 22, 2024

Miniatures for well tuned equalizer

 



I recorded many sessions with my homemade mixer ,and got stuck with noise and many pedals i built .Then i returned to this very basic set up .Just 2 ring modulators and the mixer ,mostly ..
The feedback with SIAM (Siemens based equalizer) is pure sine wave, so in fact this is me just playing a Sinewave Oscillator .These few pieces reminded me of some ambient stuff i did back in 2012 ,so listening to the similarity i figured i'll keep them short and sweet .

Sunday, October 13, 2024

few recordings

 Here's few recordings of my no input mixer .On the images among the pedals also a Universe Reverb pedal i bought from AliExpress . I said i never use it ,it's not getting along with rest of my diy gear ... but in the latest recordings i just add a little tail from it .After all this time in building gear i like to use mostly my homemade gear for recordings .









































Tuesday, October 8, 2024

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 





Tuesday, September 10, 2024

Mixer

 Finally i completed this diy mixer ,it's not as pretty as some other things i've done ,but i changed my mind too many times about too many things while building this ,so in the end i only waned to complete it and it's done . This is a Buchla 106 Mixer ,with 3 x  SIAM (Siemens based EQ) on 3 channels on one of the two groups of the 106 Mixer .There is mute on all channels and 4 groups of aux channels based on early Serge Mixer using 741 ,i expanded the 106 to 4 channels for group or 8 in total ,so that extra channel at group is actually two channel summer meant to be used as return for 2 aux groups , those 2 extra channels have Tape Saturator Colour MK1 which can be bypassed  with high pass switchable from 40hz to 60hz .The second group of the mixer has no equalizer . In addition there is 4 channel input joystick that works as a four channel panner ,or two x two channel panners ,it can be useful to browse thru the 4 aux groups ,the joystick has Colorupter Optical Disrupter Colour that can be bypassed .This build was not easy cause i reused lot of materials for the panels and the enclosure ,the enclosure is leftover from machines in an old textile factory ,the inputs and outputs are in the back of the enclosure and that part is fitted additionally but it turned out beautiful.














Bellow is a little preview ,pedals used : Zvex Fuzz Factory ,Tone God Christine ,Culture Jam Triton Delay ,Fred Briggs '64 Tones ,now too lazy to make more cables ..



















Wednesday, August 7, 2024

Wednesday, June 26, 2024

Saturday, April 13, 2024

fiction

 






Wednesday, January 17, 2024

Synthesizer Secrets

 https://synthesizerunderconstruction.blogspot.com

I made a new Blog Page ,is this end of life for this one . Over the years i made more then few PCB layouts ,and many of them were built ,tested ,modified ,so it kind of itches to place them in one directory ,like a schematics vault ,or a modular synthesizer ,so i found a layout that is working good for this purpose ,this documentation is free to download along with gerber files . Music and pretty pictures are not hosted here but i hope the list of modules will grow as i need to revisit some of the earlier layouts i made . Most people will just go and buy the kit and this is if you think you might save a few bucks . Here's the link :