About the author

Jean-Michel Falligan Devergne

Amperatubes is designed and maintained by Jean-Michel Falligan Devergne (JMF) — Paris-based Direction Artistique senior, AI-native operator and audio specialist. Two decades of vacuum-tube practice: single-ended triode builds, NOS sampling, vintage restoration, SPICE modeling. Bio, sources and contact below.

About Amperatubes — Vacuum tube design companion by Jean-Michel Falligan Devergne

IDENTITYENTRY / STACK
PARIS / DA / BUILDER
JEAN-
MICHEL
Falligan
DEVERGNE
DESIGN = CIRCUIT
NOT IMAGE / SIGNAL FIRST
MANIFESTRULE SET
CORE / ACTIVE LAW
THE SIGNAL RULES.
THE CIRCUIT DECIDES.
NO DSP / NO SIMULATION / NO STORY
QUOTEEND STATE
Sound is a consequence.
instrument serif / soft violence
SYSTEMNODE LOGIC
INTERACTION MODEL
NO MASTERONLY NODESNODE → NODESTATE CHANGEIMPEDANCE SHIFT
each stage edits the next : load / bias / gain / timing
STATEMENTCORE EQUATION
FORMAL CLAIM
DESIGN
=
CIRCUIT
FORM FOLLOWS BEHAVIOR
POWERDEVICE FAMILY
OUTPUT NODES
833A
GM70
MC1/60
GMI90
AD1
TC1/75
power triodes / not decorative nostalgia
TOPOLOGYTOOLS OF THOUGHT
METHOD / CIRCUIT AS LANGUAGE
01CCS = active load
02MU FOLLOWER = pressure / translation
03CROSS-COUPLED = tension exchange
04CATHODYNE = split / control
05TARGET = behavior before style
DEVICEAMPERA / 1BIT
Ampera 1-bit processed Amperatubes brand identity image
TYPOADDICTTUBE-AHOLIC
embedded imagedata uri / raw html
device liveheat fieldname plate
single-ended1-bit / dither
REFERENCEANZAI / AD1 / NF2
Vintage AD1 vacuum-tube amplifier schematic in 1-bit black and white
legacy pathad1 / nf2
4 watts / subjective performancescan / 1-bit
SCHEMATICLTSPICE / BLUEPRINT
LTSpice vacuum-tube circuit simulation rendered in blueprint style
rp 3200000Ωgain 49ccs 32ma
e80l / e810f / 4y100r#0400FF
MATERIALCOPPER / TRACE / FLOW
Vacuum-tube amplifier PCB copper trace pattern in 1-bit mono
tracenode path
etched board1-bit / mono
DEVICETUBES / RAW SET
Set of vintage vacuum tubes photographed in the Amperatubes studio
triode fieldglass / plate / heat
raw imagelive object
DATARUNTIME
SYSTEM DATA
base
Paris
role
DA / builder
mode
analog only
topology
single-ended
heat
direct heated
enemy
dogma
field
high voltage
output
real objects
DEV GEEKACTIVE RELATION
MICRO BEHAVIOR
LOAD
defines
stress
BIAS
sets
stance
FLOW
moves
energy
TRANSFER
shifts
state
NODE
edits
node
SOUND
arrives
last
ARCHIVEAMPERA / DATA
AMPERA DATABASE
339+
TUBES
207
SPICE
47
GUIDES
open source / free / no paywall
COLLECTIONLISTENING SET
DISCOVERY / SOURCE MATERIAL
STRATA EAST / THREE BLIND MICE / RARE GROOVE
deep jazz / spiritual jazz / private press / groove pressure / room tone
deep jazzrare groovespiritual jazzthree blind micestrata eastprivate press
OPEN DISCOGS↗
AUDIOREFERENCE STACK
PERCEPTION GRID
VOICE
AIR
GRAIN
ATTACK
DECAY
ROOM
hot cut / low noise floor / micro dynamics / stage width
SITECARGO SIGNAL
EXTERNAL NODE
falligan2.cargo.site
digital creative / art direction / typography / research redirected into hardware and signal culture
OPEN SITE↗
IMAGE FEEDSINENOBILE
SOCIAL NODE
@SINENOBILE
collage / typography / lettering / image fragments feeding the node system
OPEN INSTAGRAM↗
PREVIOUSCLIENT FIELD
FORMER SYSTEM
HermèsChanelLancômeBalenciagaArmani BeautyOmegaBugattiMoët Hennessy
LIGHTFILAMENT FIELD
HIGH VOLTAGE / LOW NOISE / LIVE PATH
SIGNATUREFINAL NODE
FINAL STATE
BUILT
NOT
BRANDED
THE SIGNAL RULES
NO MASTER / ONLY NODES
NODE / SIGNAL / DEVICE / TOPOLOGY / STRATA EAST / THREE BLIND MICE / RARE GROOVE
About the author

Jean-Michel Falligan Devergne

Amperatubes is built and maintained by Jean-Michel Falligan Devergne (JMF) — Paris-based Direction Artistique senior, AI-native operator and lifelong audio specialist. The site reflects two decades of hands-on work with vacuum-tube electronics: building single-ended triode amplifiers, measuring NOS stock, restoring vintage radio gear, and simulating tube circuits in SPICE.

Every datasheet, equivalent, pinout and SPICE model on Amperatubes is cross-referenced against primary sources — RCA RC-21, Mullard Application Reports, Philips ECG tube catalogs, Tung-Sol and Sylvania engineering bulletins — and audited against the canonical references (Frank Philipse's pocnet.net, Norman Koren's SPICE work, Merlin Blencowe's books, Morgan Jones' Valve Amplifiers). The full sourcing protocol lives at /methodology/, and per-tube discrepancies are flagged in the data quality report.

The interactive calculators (loadline, SPICE tone-stack, output transformer load matching) are not generic plotting widgets — they encode the actual design rules used on real builds, with sensible defaults pre-loaded for 339 audio tubes. The 3D viewer renders per-tube geometries digitised from physical samples in the studio.

The site is open source, free, ad-free, no signup, no tracking beyond aggregate Vercel Analytics. Email and contact form below.

Find JMF