Welcome to viva Analog

Vacuum Tube Ckts /// Guitar-Bass Effects /// DIY pages

Analog Circuit Design and Modeling

JC Maillet (c) 1996 - 2008

R.I.P. Gar Gillies & Ken Fischer


Thermionic Tech

Bias Modulating Tremolo Circuits for Vacuum Tube Amps (11/19/03)

Elliminating Hum in Tube Amps (4/13/04)

Garnet Amplifier Variable-Bias Mod (*new* 2008)


Appreciation Pages

Garnet Tube Amps

Traynor Tube Amps

** Traynor Amplifier Schematics & Mods Archive **

Fender Tube Amps

Marshall Tube Amps


Selected Tube Projects

'72 Deluxe Restoration/Conversion ('05)

Concert Rig for Ken Hamm ('05)

Traynor mkIII /// Tweed-Reverberization ('04)

Hot-Rodded Fender Combos ('01-'03)

Mesa-Boogie S.O.B. /// Marshall MkII Mod ('01)

JCM900 - Silicon Removal ('97 & '98)

1960 Bassman Restoration

TSL-122 Repair/Mods

'72 Fire Breathing Champ


"Inside Fender and Marshall Tube Amps"

ISBN 0-9684849-0-5

(c) March 2002

Basic research in Vacuum Tube technology // Amp Mods and Tweaks


\\\ Mathematical Explorations ///

A Generalized Algebraic Approach

to Modeling Vacuum Tube Triodes

(1) Glass Audio article - issue 2/98; Pspice Modeling Technique for Vacuum Tube Triodes

(2) MATLAB & Pspice Sourcefiles used in this work

(3) Pspice Rectifier Models : 5Y3GT, 5V4GA, 5U4GA, and 5AR4

(4) My Triode Reference Data RCA 12ax7 // RCA 12at7


~(: \\\ Rainbow of Sounds /// :)~

DIY Analog Effects

Triggered Swell *original design* foot activated auto-volume with dual mode effect loop ... Nyquist Aliaser *original design* Nyquist under sampler ... Stereo-Vibe 480 *original design* Don Bonham's Stereo "Maggie 480" bulb based emulator using Mieda class-A circuits ... Stereo-Vibe 45 *original design* light coupled op-amp signal path with original tri-mode super wide range constant amplitude LFO ... Range Mistress *original design* full spectrum RangerMaster type booster ... Unicord "Univibe" Phase Shifter - extensive Mods and Re-Design ... "Harmonic Multiplier" *original design* 4-quadrant multiplier based Squaring "Octaver" circuit with variable linear Mixer for Tube Harmonic Simulations and unique Octavia type sound ... Super "Full-Wave" Octaver *not original at all really* very close approx. to f(x)=|x|) ... SWR Limiter pedal *original mods* adapted for low supply including two-band active sidechain filtering ... "MutronIII" Filter/Follower, Pro version with extensive Mods ... Ranger "ParaExciter MkIII" Filter/Overdriver ... "MXR DynaComp" - Tired Battery Simulator ... EH "Small-Stone" Phase Shifter - The "Original" Univibe cap ratios Mod ... PAIA "Infinity+" sustainer circuit re-design ... 4-transistor Pitch-Only Theremin with Line-Out mod ... MXR "Phase45" - Univibing Filters, LED speed Indicator, Vibrato/Phasing mods ... Dan Armstrong "Green Ringer" - Nulling mod ... and MORE ...

Photo: Harry Primate - Missaussaugua Ontario


/// viva Analog /// 360+ /// Bass Preamplifier/Fuzz


\\\ Super Vintage - Mammoth Ivory ///

Organic Tone for Acoustic Guitars


Frank Zappa

Kim Mitchell

Lowell George

TOMMY BOLIN (Guitar Player Interview - March '77) link

Tommy Bolin's Gear


Amerindian Prophecy Stories - a Talk given by Lee Brown in Alaska (*1986*)

DogonStarMystery, BearMedicine, Newton

Helicopter dropping aid attacked by tribesmen

Joey Ramone's "Wonderful World" Lyrics and Chords

Make Music - Not War


jc -> lynx.net

Copyright JC Maillet (C)1996-2007