Epiphone Valve Jr.
•
Mercury Upgrade Kit
43
This project and its documentation is the result of technical investigations made by the engineering staff of
Mercury Magnetics
. The disclosure of the information herein may pertain to proprietary rights and
the furnishing of these documents does not constitute an expresed or implied license to use such materials.
C
3
C
2
C
1
C
1
C
2
C
3
L
PL
L
SL
R
P
R
S
R
E
R
H
L
P
L
PL
L
SL
The Output Transformer Circuit
Primary Self Capacitance
Secondary Self Capacitance
Interwinding Capacitance
Primary Leakage Inductance
Secondary Leakage Inductance
L
P
R
P
R
S
R
E
R
H
Primary Inductance
Primary Resistance
Secondary Resistance
Core Eddy Current Losses
Core Hysteresis Losses
“Blessed are the Tone Makers”
The above circuit reveals the properties of an audio output transformer. The transformer is a reactive
component—its values change depending upon the information feeding it. Transformers for
tube-based electric guitar amps are designed to intentionally provoke the tubes into distortion—
the polar-opposite of demands of hi-fi. The best guitar tone comes from harnessing and manipulating
the inherent flaws of the imperfect transformer. This is where art meets science in our pursuit of
great guitar tone.
—Sergio Hamernik
Mercury’s
circuit equivalent of an Output Transformer
Consider the above vs. this typical
dummied-down transformer symbol
Copyright © 2006 by Mercury Magnetics. All Rights Reserved. Mercury Magnetics, ToneClone, Mercury Vintage, FatStack, Mini-Choke, M.A.G.I.C. and VoodooScrew are trademarks
of Mercury Magnetics. Axiom and Multiple Arrayed Geometric Inductive Coupling® are registered trademarks of Mercury Magnetics.
Players who know tone insist on
Mercury Magnetics
transformers
9167 INDEPENDENCE AVE. • CHATSWORTH, CA 91311 • (818) 998-7791 • FAX (818) 998-7835
www.
MercuryMagnetics
.com
Summary of Contents for Epiphone Valve Junior
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