6
Epiphone Valve Jr.
•
Mercury Upgrade Kit
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.
Factoid:
A
Mercury
Mini-Choke
™ replaces a resistor and
adds a discernable amount of tonal dimension to the circuit.
Perform your own experiment when working on your
Valve Jr.
—
try it with and without the
choke
mod to the circuit. You’ll have
no difficulty hearing how much better it sounds with the
choke
.
Chokes
were originally used in vintage amps but seldom are
now due to the economics of amp building (a cost issue, not a
tonal one!).
Chokes
extend the life of the
power transformer
and rectifier. A choke is much more than a simple inductor. It
can also store energy like a capacitor. Better voltage regulation
results from using a
choke
that puts less stress on your
power
transformer
helping it to live longer.
Chokes
permit higher
load currents to be drawn from vacuum tube rectifiers without
exceeding their peak current rating. This means life extension
for your tube rectifier! Solid state rectifiers run happier as well. If
that’s not enough, the tone of your amp will noticeably improve
with a “peaked and tweaked” hand-tuned
choke
from
Mercury
.
You’ve made the
Mercury
Upgrade
– now
you’re ready to play!
O
“State-of-the-Art”
Studio Samples
Follow these links to a selection of undoctored
MP3 samples of the prototype Mercury Upgraded
Valve Jr. Just for the fun of it these samples were
made under primitive conditions (see the photo to
the right).
A special “Thank you!” goes out to LA musician
Phil Woodward for his guitar work on these
tracks:
Содержание Epiphone Valve Junior
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