\\\ Analog Bass/Guitar Effects and DIY ///
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Custom/Original Designs
JC Maillet (c) 1996-2009
"Opto-Vibe" /// Super Wide-Range Univibe re-Design
(c) 2009
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"Little FET Booster" Amplifier Driver
(c) 2009
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"360+" Bass Preamp/Fuzz System
(c) 1997/2009
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Univibe Maximizer
(c) 1996 - 2009
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"Stereo-Vibe 480" (c) 2005
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"Stereo-Vibe 45" (c) 2006
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"Stereo Vibe" (c) 2007
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8x opto-cell (2x4) op-amp Stereo Vibe-Phasor with accurate replication of Univibe Range and AC-Response
... listen to one channel only and compare against Univibe
"Range Mistress" (c) 2004
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"SRV Special" (c) '98/'08
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"Triggered Swell" (c) 2006
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"Brownian Motion Filter" (c) 2006
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opto controlled multi-band State Variable filter with glide option and variable Q
"Unitrem" (c) 2006
designed/built 17-04-05
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Univibe Oscillator crossed with jFET emulation of Fender VibroChamp bias modulator
6-Band "Class A" Equalizer (c) 2006
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"Harmonic Multiplier"
(c) (4/'00) - (8/'01)
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original "Nyquist Aliaser" Project (c) 2006
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MXR "Phase45" // Univibing Mods
Univibe Cap Ratios, Phase/Vibrato, LED monitor
Wide Speed Range (10/'03)
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Musitronic "Mutron-III"
Mods/Additions (c) '96 and '02
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MXR "DynaComp" Mods ('02)
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Electro-Harmonix "Small-Stone" Mods ('97)
Univibing Frequency Ratios // Cutting Bass Response
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"Royal" Octaver Fuzz
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SWR-Style Bass Comp/Limiter (c) 2005
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PAIA "Infinity+"
Compressor Re-Design ('98)
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Dan Armstrong "Green Ringer"
Nulling Mod (10/'03)
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Craig Anderton's "Balanced Modulator"
Switch-able Lock and Tuning Range Mods ('97)
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The Sound of f(x)=|x|
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Ranger "Para-Exciter MkIII"
Clone ('98)
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A synth-like wah when living in a volume pedal - variable-Q filter booster with adjustable gain with enough output for serious amplifier overloading ... I'm told Tony Iommi used one at some point ...
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Jake Rothman's Pitch-Only Theremin ('99)
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Craig Anderton's "Bi-Filter Follower" (10/03)
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Vox "Suppa Tone Bender" Clone ('97)
VOX issued this circuit in 1974 - it had some connection with Steve Hackett ... Ultra-thick and compressed, this fuzz can produce a nice Brian May singing tone - similar to a BigMuff except for extra shunting diodes ... works well with standard parts ...
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Yamaha "CH-10MII Chorus" - (c) 2002
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This unit provides warm chorusing and good leslie simulation at mid speeds ... the LFO speed pot was intermittent so I epoxied a replacement outside on top and stuck a bigger knob for easy foot control ...
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To extend the LFO range into high warble territory I short out the speed-limiting resistor - that's R62 33k connected in series with the 250k SPEED pot ... and to extend the depth of the effect a little I short out R65 470k - the resistor leading to the depth control ... two easy mods providing extended performance ...
Rocktron X100 Mods (c) 2006
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Roger Mayer's Axis Fuzz with switcheable BMP tone
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opto-Limiter with Linear V-R converter
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Joe Davisson's Antiquity on Ge PNP's
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"Diva Crunch" /// My take on Doug Hammond's "Meteor"
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Simple Audio Range Sine-wave Oscillator with Shape Control
(c) 2008
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Uses common parts: Radio Shack 272-1139 (1.5v 25mA) or 272-1140 (6v 25mA) bulb, a 1k trimmer, any standard op-amp, two 0.22uF Ceramic caps, a dual 50k LIN pot and two 9volt batteries - you may want to stick a 5k or 10k output volume pot on there too, and if you're gonna box this thing up may as well bring the Shape control trimmer on top ... tuning the Shape control allows constant amplitude and cleaner sine wave, perhaps at the expense of lock-in times as the oscillator becomes glitchy when sweeping the FREQ pot ... offsetting allows dirty waveform with more grip, and better lock-in - no glitching ... Note: a little bit of RF can creep into the circuit because by lack of decoupling on the supply rails - to me it's more interesting this way - but it's easy to fix if you don't want that, simply stick capacitance (10uF electro and 0.1uF ceramic in parallel) from each op-amp supply pin to gnd - that's 4 caps in all ... simillar in design to the oscillator that made Hewlett&Packard famous and rich this is a great little high performer employing very few parts
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"MOJO" class-A Exaggerator
(c) 2008
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"Super-MOJO II"
(c) 2008
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"Envelope Locked Loop" (c) 2007
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EMAIL: jc AT lynx DOT net