Gries Five User manual

zie4
Amplification
dcie
Tube
Amplifier
Owner’s Manual
Congratulations
and thank
you
on
your
selection
of a zce
all tube
guitar
amplifier.
Please
read
this
manual
before
operating your
amp.
Tube amplifiers
contain
potentially
lethal
voltages
even
after
they
are unplugged
that
may
cause
injury
or
death.
Do
not attempt
to
repair
or
modify
any
amplifier unless
you are
absolutely
certain
you
are qualified
to
do
so.
To
reduce
the risk
of
fire or
shock
hazard
do
not
expose
the amp
to moisture.
Plug
the amp into
a 3
prong grounded
AC
outlet
only.
Do
not alter
the
AC
plug.
Output
tubes
run
very
hot.
Turn
off
amp and
let it
to
cool
before
replacing
tubes.
Never
operate the
amp
unless a
speaker
is
connected
to
one
of the speaker
jacks;
doing
so
may
damage
the
output
transformer
and
will
void
your
warranty.
Replace
all
tubes
and
fuses
using
only
the
same types.
If
you
remove
the
chassis
from
the cabinet
be
careful not
to
dent the
edges
of
the
faceplate.
Front
Panel
Input
Jacks
- Connect musical
instrument(s)
to amp.
Volume
- Controls
input
gain.
Gain
- Blends the passive
EQ
(Treble,
Mid,
&
Bass) controls
out of
the
preamp circuit
and
restores
the
gain
that
is typically
lost
in
the
passive
EQ
section.
Gain Pull
Bright
Switch
— Pulling
the control
out
increases
treble
response.
Treble,
Midrange,
Bass
- Control equalization.
Master
Volume
-
Controls preamp
output
level
and
overall volume.
Lamp
-
Glows
when
AC
is
on.
Rear
Panel
Fuse
Holder
-
Holds
1
amp
type
3AG
slow
blow
fuse.
AC
Cord
- Plug
into
grounded
120
VAC outlet.
AC
Switch
(Power)
-
Controls electrical
power
to
amp;
turn
up
to operate.
Speaker Jacks
- One
speaker
and one extension.
See
Speakers.

foot
Switch
Jack
—
Connects
to
a
push
on
—
push
off
type
foot
switch
to
turn
the
Gain
function on
or
off.
The
foot
switch
should
have
a
shielded
cable.
Operation
Plug
guitar
cord
into
an
Input
Jack.
With
Volume and
Master
Volume
controls
set low, turn
AC
switch to
on
position
(up).
It
will
take
less
than
a
minute
for
the
tubes
to
warm
up
and
the
amp
to operate.
The Volume,
EQ.
Gain,
and
Master
Volume
controls
interact with
each
other
in
a
way
that
may
not
be
apparent.
See
“Suggested
Settings”
before
use.
Speakers.
When
using one speaker, always
plug into the Spkr
jack.
Use
the
Ext
jack
when
a
second
speaker
is
used.
The
output
impedance
is
8
ohms
and
the
impedance
of the
stock speaker
is also
$
ohms.
It
is
possible
to
connect
the
speaker output
to
a
load
of 4
to
16 ohms
without
causing
any
problems.
Never
operate the amp
unless
a
speaker
is
connected
to
a
speaker jack.
Doing
so
may
damage
the
output
transformer
and
will
void
your
warranty.
fuse
replacement.
Unplug
the
AC
cord
before
replacing
fuse. Use
only
1
amp
type
3AG
slow
blow
fuse.
A
fuse
that
blows
repeatedly indicates
the
amp
is in
need
of service.
Tube
replacement.
Unplug
the
AC
cord
and
allow
tubes
to
cool
for
five
minutes.
To
replace
small
preamp
tube
remove
the
aluminum shield
and
gently
pull
the
tube
out
using
a
slight
circular rocking
motion.
To
remove
the
large
power
and
rectifier
tubes,
push both
sides
of
the
retaining
clips
away from the base
of
each
tube
and
pull
with
a
circular
motion.
To
install
tubes, ensure
that
the
gap
between
pins
on
a
small
tube
(or
the
key
in
the
base
of
a large tube)
aligns
properly with
each
socket.
Power
tubes
generally
need
replacing
every
one
to
three
years,
depending
upon
how
often
and
hard
the
amp
is
used
preamp
and
rectifier tubes
generally
last much
longer.
Suggested Settings
Any
numerical
reference
to
a control
setting
assumes
a
scale
of
0
—
10,
with
0
fully
counterclockwise,
10
fully
clockwise,
and
5
straight
up.
for
“Clean”
tones:
Leave
Gain
at
0
and
Master
Volume
at
10.
Adjust Volume, Treble,
Midrange,
&
Bass for
desired
tone.
The
sound
will
begin
to
distort
as
the Volume
is
turned
past
5
or
so,
depending
on
the
guitar
and
picking
technique
used.
To
add
some
“Crunch”: Start
with
a
clean
setting and
turn
the
Gain
to
1
or
2.
The
amp
will get
considerably louder
as the
Gain
is
turned
up.
When
the
Gain
is
set
at
4 or
above,
it effectively
removes
the
EQ
from
the circuit
and
the
Treble,
Midrange,
&
Bass
controls
no
longer
have
any
effect.
THIS
IS
PERFECTLY

NORMAL. When
the Gain is
set at
4 or
above, use
the tone control(s) on your
guitar to affect
the tone.
For “Distorted” tones: Set
Volume and Gain in
a
range of 4 — 10. Overall volume can
be
reduced
by
turning the
Master Volume down from 10. Spend some
time
experimenting.
Try the Gain on 10 and gradually turn
up
the Volume
to
increase
distortion. Or turn the Volume to
10 and
adjust
the Gain. F or maximum
distortion, set
both the Volume
&
Gain
to
10 and control overall volume with the
Master
Volume. A small, low-powered
tube
amp like this will generate
distortion
in both
the
preamp and power
tubes.
The Master Volume is “between”
these tubes
in the circuit. Turning it down will reduce the power tube distortion
and
“clean
up”
the sound
to a
certain extent.
Gain Foot Switch: Connecting a foot
switch
to
the rear panel jack allows
you to toggle
between the sound
&
volume produced by the setting of the Gain control and the
sound with the Gain
set at
0. By setting the Gain around 2-4 this can
be used as a
boost
for
solos.
The Bright Switch
is more effective
at
lower
settings of the Volume control.
Tube Layout
Looking
at
the rear of the
amp from left to right: 5AR4, 6V6 or 6L6, 12AX7
Limited Warranty
U4
Amplification will repair
or replace defective materials or workmanship
for
a
period
of
three
years
without charge. Vacuum
tubes and
lamps carry
a
ninety
day
warranty;
Eminence speakers are covered
by
their own
seven year warranty. This
warranty applies only
to
the original purchaser.
Please retain your sales
receipt
as
it is your
proof of purchase. This warranty
does not cover neglect,
abuse, or
transportation
costs.
For
warranty service
contact:
U€2
Amplification
P.O. Box 514
Mattapoisett, MA
02739-0514
508-287-2339