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Musical Circuits
Musical Circuits:  #'s - C        D -M        N - S        T - Z  

Last Updated: December 29, 2017 03:15 AM

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

UBE Screamer - A CMOS implementation of the Tube Screamer.   __ Contact: holler @ runoffgroove.Com

Ultra Simple Circuit Bass Guitar Compressor - An ultra simple compressor, ideally suited for bass guitar.   __ Designed by Rod Elliott  ESP

Ultra Simple Circuit Line Mixer for the Studio - Because we needed a mixer for some shows that our band is doing, I felt the need to make a simple line mixer to run the sound modules through in the studio to free the Mackie mixer for our shows.  Up until now it has been a real hassle to yank out the Mackie from the studio everytime we had to do a show.   __ Designed by Jon Tirone, AKA John Fisher

Umble-A distortion stompbox, inspired by Dumble Amplifiers. Schematic & PCB/perfboard layouts. - A distortion stompbox, inspired by Dumble amplifiers.   __ Contact: holler @ runoffgroove.Com

Uno-The Boogie MkI - One of the first amps to offer distortion at lower volumes was the Boogie MkI amplifier.  As told by Randall Smith, the designer of the Boogie amp, these amplifiers were born of a practical joke on a guitarist friend.  Mr.  Smith modified a Fender Princeton to have considerably more gain and power, but appear stock.  As the story goes, Carlos Santana play-tested the amp and was impressed.  Carlos was quoted as saying the amp "really boogied!" Thus, the name of the amp was born.   __ Contact: holler @ runoffgroove.Com

Using an old Computer Box to build a guitar Amplifier - In the event of the new ATX computer boxes, the former boxes for PC will become and are becoming obsolete.  It is almost unimaginable how many unused computer boxes will be unused or trashed very shortly in history.  That's a lot of metal.  They will be and are already common articles in junk shops, flee markets and garage sales.   __ Designed by Jon Tirone, AKA John Fisher

Using the Hot Springs Reverb reverberation unit - The Hot Springs tanks and circuit board should be mounted in a location that is free of ambient electro-magnetic fields.  The input and output jacks are typically placed on a patch panel with other effect's inputs and outputs.  In use, the effects or aux send buss of the console patches to the Hot Springs input and the output of the Hot Springs returns to one of the mixer inputs for control of reverb level in the total mix.h __ Designed by John Simonton

VamPower 100 Watt PA Amplifier - The schematics on this page are actually of the VamPower 100 watt PA Head and have been kindly drawn and submitted by Andrew Higgins  (many thanks indeed Andrew) .  Though they are of the PA Head, the power supply, output stage and splitter are pretty much the same on most of the VamPower amps.  It's only the PA front-end pre-amp that differs.   __ Designed by John Chambers

Various tube Crossovers - You'll find here few ASCII schematics for Heath and Marantz tube crossovers.  They were given in L'Audiophile No 11 old sery July 1979

Versatile FET booster engine. Schematic & perfboard/PCB layouts. - A versatile FET booster engine.   __ Contact: holler @ runoffgroove.Com

Vibrato Unit for Guitar - A reasonably simple circuit, with results similar to the Vox AC30 guitar amp __ Designed by G. Forrest Cook

Visual metronome - The Metronome is any device that produces a regulated audible and/or visual pulse, usually used to establish a steady beat, or tempo, measured in beats-per-minute  (BPM) for the performance of musical compositions.  It is an invaluable practice tool for musicians that goes back hundreds of years 

Vocal zapper - This low cost device can be used with any conventional stereo system to remove the lead vocal from most stereo tapes, CDs or records.  Plug in almost any dynamic microphone and you're ready to put your voice where the lead singer was.   __ Designed by John Simonton

Vocal Zapper-How It Works - All vocal eliminators start with the assumption that the lead vocal in a recording is in the center of the stereo field - which means that it is equal amplitude and phase in both left and right channels.  Subtracting one channel from the other removes this highly correlated signal while leaving the uncorrelated signals in the channels unchanged.  Since kick drum and bass are often recorded at stereo center the time constant of C3 and R12 is chosen so that these signals are blocked from the non-inverting input so they pass to the final output without being zapp __ Designed by John Simonton

Voltage Controlled Panner - pans audio left and right __ Designed by G. Forrest Cook

Volume Control - This circuit could be used for replacing your manual volume control in a stereo amplifier.  In this circuit, push-to-on switch S1 controls the forward  (volume increase) operation of both channels while a similar switch S2 controls __ Designed by Aaron Cake

Volume Pedal Conversion - Volume Pedal Conversion for Wah Pedals __ Designed by Guitar Effect RC Keen

Vox AC30 Guitar Amplifier Simulator - This project has been withdrawn at Stephan's request, as he has sold the rights for the AC30 Simulator to a manufacturer.  While its removal is obviously a loss for my site, I wish him well.  Sorry for any inconvenience.   __ Designed by Rod Elliott  ESP

Vox AC-30 Top Boost adapted for use as a distortion stompbox - The Vox AC-30 amp is considered by many to be the defining sound of the British Invasion during the 1960s.  The Top Boost circuitry provided crisp treble-laden overdrive that perfectly complemented the rich bass content.  The English Channel is a JFET-based distortion stompbox that uses the same basic architecture as that classic early '60s amp. __ Contact: holler @ runoffgroove.Com

Wave Multiplier for music synthesizers - The idea for this project came from the fabled middle section of the Serge wave multipliers.  At the time I designed this, I had never seen or heard one of these units, nor had I seen its schematic diagrams, but armed with descriptions and suppositions by various people who had seen them, and a couple of photos of CRO traces from the output of the module, I decided to design myself one. __ Designed by Ken Stone

Why do we need Mixer? - Article:  The mixing of a number of audio signals is such a common thing to do that one would expect the Net to be riddled with articles on how and why signals are mixed.  There are plenty of circuits that show how it can be done, but very little that explains the benefits or drawbacks of any particular scheme.   __ Designed by Rod Elliott  ESP

WidgyBox-A Guitar Distortion Effects Unit - Plug into to those great guitar sounds with this unit.It's cheap, easy to build and can be run from a 9V battery or pugpack supply.__ SiliconChip

Wien-bridge Theremin - This circuit is a basic theremin with only a pitch control.  It uses the "heterodyne" technique, as did Theremin's original instrument.  Heterodyning is advantageous in its simplicity, and is made further attractive in this design by eliminating the coils that are usually hard to find  (electronic design 10/05)  __ Designed by Arthur Harrison

Wireless guitar transmitter - Schematic only

Wurlitzer Jukebox repaired with digital MP3/WAV file player & auduino - This cool old jukebox from Wurlitzer is owned by my dad, its 100% all mecanic brain from 1965 is worn out many years ago,
it is very complicated and time consuming to make it run stable for just a few days before a new problem show up,
So the perfect fix is to skip the mecanics, use all buttons and credit indicator as it is, and make it all digital, __ Designed by Thomas Scherrer OZ2CPU

Yet Another Mobile MP3 Player - This is an earlier player using a conventional PC motherboard, so the power supply I designed is quite compatible.   __ Designed by Bob Blick

Zonk Machine & Treble Booster - Thanks to A.  Coleman for lending his original Hornby-Skewes Zonk Machine for tracing.  This is another of those obscure distortions that were designed in the early years of electronic distortion for guitars.  It�s not YAFF  (Yet Another Fuzz Face) circuit, and it�s probably more interesting for that.  Thanks also to �amscray� for providing the schemo for the Hornby-Skewes Treble Booster, which is purportedly the preferred front end for this __ Designed by R.G. Keen

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Musical Circuits:  #'s - C        D -M        N - S        T - Z

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