Mojotone CANYON Series User manual

1WWW.MOJOTONE.COM

BUILD. MODIFY. REPAIR.2

Mojotone’s Tweed Champ 5F1 Style Amp Kit is based on the beloved 5 watt amp from the
1950s. These amps were perfect for recording
and were featured on a wide array of recordings
from Joe Walsh’s “Rocky Mountain Way” all the
way to Derek & the Dominos’“Layla.” Modeled
after the historic Class-A 6V6 platform, this amp
delivers warm tones that are harmonically rich
and have a beautiful low volume crunch.
The amp utilizes one 6V6 power tube and one
12AX7 preamp tube, giving the amp its famed
lush harmonic composition. We chose our
Mojotone American Vintage AV8C 15 Watt
speaker to complement the 5F1 style circuit
since it has a nice clean sound at its lowest
volumes but introduces an articulate and
unique grit as you increase the amp’s volume.
Don’t be fooled by the fact that this circuit
features only a single volume control; 5F1s
have been used by some of the greatest
guitarists and on some of the greatest
recordings of all time. Our Tweed Champ style
amplier is extremely tactile and responds
well to dynamic playing; so no matter if you
play jazz, classic rock, blues or anything in
between, you will not be disappointed.
TWEED CHAMP
5f1 STYLE 1X8 COMBO AMP

Copyright © 2019 Mojotone, LLC
All content included in this book including text, graphics and images is the property of Mojotone, LLC and protected by U.S. and international copyright laws. The collection, arrangement and assembly of all content in this book
is the exclusive property of Mojotone, LLC and protected by U.S. and international copyright laws. You may not copy, reproduce, distribute, publish, display, perform, modify, create derivative works, transmit, or in any other way
exploit any part of copyrighted material without permission from Mojotone, LLC.
Disclaimer: Mojotone, LLC makes no representations or warranties of any kind as to the information, content, procedures, materials or operation of this book. To the full extent permissible by applicable law, Mojotone, LLC
disclaims all warranties, expressed or implied, including but not limited to, implied warranties of merchantability or tness for any particular purpose. Mojotone, LLC will not be liable for damages of any kind arising from the use
of this book, including but not limited to direct, indirect, incidental punitive and consequential damages.
CONTENTS
INTRODUCTION pg. 3
SECTION 1: SAFETY pg. 3
SECTION 2: INVENTORY pg. 4
SECTION 3: TOOLS pg. 5
SECTION 4: COMPONENT IDENTITY & ORIENTATION pg. 6
SECTION 5: HOW TO READ COMPONENTS pg. 6
SECTION 6: SOLDERING BASICS pg. 7
SECTION 7: CHASSIS ASSEMBLY pg. 8
SECTION 8: CIRCUIT BOARD ASSEMBLY pg. 10
SECTION 9: TRANSFORMER WIRING pg. 12
SECTION 10: CIRCUIT BOARD Installation pg. 14
SECTION 11: WIRING THE SOCKETS, POTS, JACKS & Power Cord pg. 15
SECTION 12: Speaker Wiring & Installation pg. 18
SECTION 13: INITIAL CHASSIS TESTING pg. 19
SECTION 14: Chassis Installation pg. 20
SECTION 15: SOUND TEST pg. 21
SECTION 16: TROUBLESHOOTING pg. 21
MORE FROM MOJOTONE pg. 22

5WWW.MOJOTONE.COM
Introduction
This amplier kit wiring and assembly are based on the same construction methods
that the original designers used 50+ years
ago. This vintage method of assembly is a
“hands-on” experience. You should take your
time when assembling the kit. It’s always
exciting as you get closer to nishing the
build, but this is where errors will normally
occur. It can become overwhelming when
looking at the whole picture of building the
kit, therefore try looking at the amp in small
sections. Ex: The input jacks, preamp section
on the board, power supply section on the
board, wiring the potentiometers, wiring the
preamp tube sockets, wiring the power tube
sockets, transformer wiring and so on.
Remember to take your time and enjoy the
build. If you get stuck on something, step
away from the build for a few hours or a day,
then come back to it.
SECTION 1:
SAFETY
SAFETY FIRST! Electronics can be dangerous
and must be treated with respect. Any circuit
that works with 120VAC power from an
electrical outlet is especially dangerous and
could potentially kill you. Here are some
guidelines to keep you safe as you work.
{Never work on a circuit while power
is applied.
{Do not connect power to a circuit until
the circuit is nished and you have carefully
checked your work (twice).
{If you smell anything burning,
immediately disconnect the power and
examine your circuit to find out what
went wrong.
{Keep your work area dry and organized.
{Be careful around large capacitors.
They can continue to hold voltage long after
they are disconnected from power. Discharge
electrolytic capacitors if power has been
applied to the unit.
{Be especially careful when you solder. A
hot soldering iron can easily burn you.
{Always work in a well-ventilated space.
{Have safety equipment such as a re
extinguisher, a rst-aid kit and a phone nearby.
{Be Patient! Rushing through any type of
technical work just leads to frustration and
compounds issues that can easily be avoided.

BUILD. MODIFY. REPAIR.6
SECTION 2:
INVENTORY
(1) solid pine cabinet*
(1) Mojo 760 EX power transformer
vacuum tubes*
(1) 10' install power cord
w/ hardware
(1) ground tab
(2) rubber grommet
(1) RCA speaker jack set
(2) J12A 1/4” shorting jack
w/ hardware
(1) indicator light assembly
w/ hardware
(1) fuse holder, (1) slow blow 1 amp
fuse w/ hardware
(1) 1MA potentiometer
w/ hardware
(1) chicken head knobs
(1) Jensen C8R 8" 25watt 4Ω speaker*
(1) NOS 771 output transformer
(2) octal tube socket, (2) tube clips
(1) chrome chassis
(1) eyelet board & backer board
(1) 9-pin tube socket, (1) tube shield
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1
12AX7 12AT7
6V6GZ34S
10
9
8
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6
5
4
3
2
1
12AX7 12AT7
6V6GZ34S
10
9
8
7
6
5
4
3
2
1
12AX7 12AT7
6V6GZ34S
(1) (1)
(1)
5Y3 6V6
12AX7
100 Ω
1M
220K
68K
100K
22K
1.5 K
10 K
470Ω
5Y3 6V6
12AX7
100 Ω
1M
220K
68K
100K
22K
1.5 K
10 K
470Ω
5Y3 6V6
12AX7
100 Ω
1M
220K
68K
100K
22K
1.5 K
10 K
470Ω
5Y3 6V6
12AX7
100 Ω
1M
220K
68K
100K
22K
1.5 K
10 K
470Ω
5Y3 6V6
12AX7
100 Ω
1M
220K
68K
100K
22K
1.5 K
10 K
470Ω
5Y3 6V6
12AX7
100 Ω
1M
220K
68K
100K
22K
1.5 K
10 K
470Ω
10
9
8
7
6
5
4
3
2
1
12AX7 12AT7
6V6GZ34S
*optional based on order

7WWW.MOJOTONE.COM
HARDWARE
keps nuts (6) 4-40, (6) 8-32, (2) 6-32, (2) 10-32
(4) 4-40 x 1/4” screw
(2) 8-32 x 1/4’’ screw
(6) 4-40 x 3/8’’ screw
(2) 6-32 x 1/2’’ screw
(2) 10-32 x 11/2’’ screw
WIRES
(2’) 18 gauge stranded Black
(2’) 18 gauge stranded WhiteWhite
(3’) 18 gauge pre-tinned Green
(10’) 22 gauge pre-tinned YellowYellow
RESISTORS
Carbon Composite
(2) 1/2 watt 100Ω
(2)
1/2watt 1.5K
(2)
1/2watt 22K
(2)
1/2watt 68K
(2)
1/2watt100K
(1)
1/2watt220K
(1)
1/2watt 1M
Metal Oxide
(1) 2 watt 10K
Wire Wound Ceramic
(1) 5 watt 500Ω
Capacitors
(1) Sprague Atom
25µf @50v
(1) Mojotone Electrolytic King Cap
16µf @475v
(2) Mojotone Electrolytic King Cap
8µf @475v
(2) Orange Drop
0.022 µf @ 600v
{1/2'' nut driver
{Set of needle nose pliers (one with teeth
and one without)
{Wire cutters
{Wire strippers
{Soldering iron and solder
{Adjustable wrench
{Phillips head screw driver
{Multimeter
16uF
8uF
1
00
1
M
2
2
0
K
68K
1
0
0
K
22K
1
.
5
K
500
0.022uF
SECTION 3:
TOOLS
Certain tools are required to successfully build your amp. The following are recommended
to complete your project.
NEED A TOOL? Do you see something on
this list that you need? Turn to page 20
for a full list of tools, parts and kits to
add to your workbench

BUILD. MODIFY. REPAIR.8
color
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Grey
White
Gold
Silver
TOLERANCE
± 1%
± 2%
± 0.5%
± 0.25%
± 0.10%
± 0.05%
± 5%
± 10%
BAND 1
0
1
2
3
4
5
6
7
8
9
BAND 2
0
1
2
3
4
5
6
7
8
9
MULTIPLIER
1Ω
10Ω
100Ω
1KΩ
10KΩ
100KΩ
1MΩ
10MΩ
100MΩ
1Ω
0.1Ω
0.01Ω
SECTION 4:
COMPONENT IDENTITY &
ORIENTATION
Ensure all polarized caps are in the correct orientation when installing onto the
board. This is typically denoted by an arrow
pointing towards the negative side, or a
small indention on the positive side.
Safety first! A cap in the wrong orientation
can explode! So follow your wiring diagram
and pay close attention when orienting your
polarized caps
SECTION 5:
HOW TO
READ COMPONENTS
Reading Resistor Values
The resistors that are included in your
Mojotone kit, all use the 4-band resistor color
code for determining their values. The easiest
way to read the resistors, start by having the
gold strip facing towards the right. The rst two
colors on the left are going to be your values,
for example Yellow & Violet would be 47. The
third strip is going to be your multiplier. So for
this example, the third strip is a yellow stripe
which is 10,000. The value of the resistor is
calculated as such 47 X 10,000 which equals
470,000 ohms or 470K ohms.
Reading Orange Drop Capacitor Values
Your Mojotone kit includes 715P Series
Orange Drop capacitors. These capacitors use
a numerical value and multiplier, very similar
to resistors, for calculating their values. The
top line printed on the capacitor is going to
be the series number followed by the 3 digit
voltage rating. For example, SBE 715P600V
translates to SBE (manufacturer), 715P
(capacitor series / type), 600V (DC voltage
rating). The next line will have a 3-digit code
followed by a letter. Just like the resistors, the
rst two digits are your values in pico farads
(pf) and the third digit is the multiplier. The
letter code after the 3-digits is tolerance value
for the capacitor. For example, 104J is equal
to 10 X 10,000 or 100,000pf which converts
to 0.1uf, the ‘J’ indicates that cap is has a 5%
tolerance in value. The 4-digit code after the
value digits is going to be the date code when
the capacitor was manufactured. For example,
0936 converts to the 36th week of 2009.
NON-POLARIZEDPOLARIZED
common values for Orange Drop Capacitors:
102J - 0.001uf
222J - 0.0022uf
332J - 0.0033uf
472J - 0.0047uf
103J - 0.01uf
223J - 0.022uf
473J - 0.047uf
104J - 0.1uf
SBE715P600V
104J 0936
manufacturer
series / type
DC voltage rating
date code
capacitance & tolerance values
4 7 x 10,000 =
470,000 Ω
or
470K Ω

9WWW.MOJOTONE.COM
SECTION 6:
SOLDERING BASICS
Before you start slinging solder in your kit or if you have never soldered before, take
a moment to read over this section about
soldering.
When assembling your amp kit, whether
it’s putting components on the eyelet board,
wiring up the tube sockets or connecting
wires to the potentiometers, the rst thing you
want is a good solid mechanical connection.
So for example if you are connecting a wire
to a pin on a tube socket or on the back of
a potentiometer, you do NOT want to set
the wire on the pin or let it oat loosely and
throw a bunch of solder on there. Solder is
not a great conductor, specially some of the
newer lead-free solder, think of it as more of
a semi-conductive glue. So what you want
is a solid physical connection between the
components that you are connecting together.
For example, when soldering to a tube
socket, you would want to create a hook with
the wire or component lead, hook it through
the pin, then use a pair of needle nose pliers
to pinch the hook together around the pin.
Now the wire has a solid connection to the
pin, so even if solder were to fail, in theory
you have the components connected together.
After you have created the mechanical
“bond”, then you can add a little solder to
help solidify the joint.
Working with eyelet boards
When installing components onto the
eyelet boards, you want the component to
lay or sit down onto the board, feeding the
leads into the eyelets and them bending
them underneath the board. Once all the
components are installed on the board and
the connecting wires are attached as well,
then start soldering the joints. After they have
been soldered, be sure to clip the excess leads
that are underneath the boards so that they do
not short against other components.
PRO TIP: There is an exception to laying a
component down on the eyelet board and
that would be when higher wattage resistors
are in the power supply OR if the amplier
is running the power tubes in a cathode
biased conguration. These components
are dropping voltages across them during
operation, which results in excess heat, and
needs to oat a little above the board to
dissipate the heat.
Soldering a Connection
{Connect the components together. Be
sure you have a solid mechanical connection
before you proceed.
{Make sure the tip of the iron is clean.
{Heat the components by touching the tip
of the iron to both components at the same
time. It should take about 2-3 seconds for the
connecting component leads to become hot
enough to ow solder.
{Slowly ow the solder into the connection.
The solder should liquefy and spread over the
connection. If the solder does not melt almost
instantly or if it beads up and falls off, double
check the temperature of your soldering iron
and make sure the tip of the iron is clean.
{Remove the solder from the connection.
{Remove the iron from the connection and
allow the joint to cool. Once it has cooled
you can gently pull the component to test the
connection.

BUILD. MODIFY. REPAIR.10
SECTION 7:
CHASSIS ASSEMBLY
TRANSFORMERS
{Mount the power transformer by rst
removing the black rubber tips on the ends of
the mounting screws. Do NOT remove the nuts
on the transformer. These are used to create an
air gap for dissipating heat. The transformer will
be recessed through the rectangular cutout in the
“belly” of the chassis. Install 8-32 keps nuts on the
left two studs (ones that are closest to the side of the
chassis). Install a ground tab on each of the right
studs and fasten with 8-32 keps nuts.
{Install rubber grommets in holes for
output transformer leads.
{Mount the output transformer using the (2)
8-32 x 1⁄4” screws and corresponding keps nuts
onto the outside of the chassis next to the power
transformer (output transformer is not recessed).
Install the transformer so that the Red and Blue
wires go through the grommet closest to the power
transformer and the YellowYellow wire goes through the
grommet furthest from the power transformer. The
screws will go through the outside of the chassis,
and the nuts will be installed in the inside. Use a
screwdriver and adjustable wrench to tighten.
CONTROL PANEL
{Mount the fuse holder using its pre-
assembled hardware and adjustable wrench.
Install fuse.
{Mount the indicator light using its pre-
assembled hardware and adjustable wrench.
1 2
1 AMP
FUSE
1 2
1 AMP
FUSE
1 2
1 AMP
FUSE
1 2
1 AMP
FUSE
1 2
1 AMP
FUSE
1 2
1 AMP
FUSE
power
transformer
power
transformer
cutout
rubber
grommet
holes
output
transformer
mounting
holes
output
transformer
ground tab
fuse holder assembly
indicator light assembly

11WWW.MOJOTONE.COM
{Mount potentiometer using it’s pre-
assembled hardware and 1/2” nut driver. Make
sure the potentiometer is mounted with it’s lugs
facing up towards the open end of the chassis.
PRO Tip: When mounting the pots, make sure
the toothed locking washer goes between the
potentiometer and the chassis. The at washer
will go on the outside of the chassis and the
nut will tighten down.
{Once you have the pot securely installed,
turn the shaft of the pot all the way counter-
clockwise. Install the chicken head knob onto
the pot shaft making sure the pointer of the
knob is pointing to “1” on the chassis. Use a
small at head screwdriver to tighten the set
screw in the back of the knob securely on the
pot shaft.
{The input jacks will be installed in a later
section.
REAR PANEL
{Mount octal tube sockets and tension
clamp using the (6) 4-40 x 3/8” screws and
keps nuts. When mounting, be sure to choose
an orientation and keep this orientation
uniform through both octal sockets. Install
octal sockets with solder lugs facing inside
the chassis.
{Mount speaker jack using its pre-
assembled hardware and 1/2” nut driver.
{Mount 9-pin tube socket using (4) 4-40
x 1⁄4” screws and keps nuts and tighten down
with adjustable wrench and screwdriver.
potentiometer and knob assembly
octal tube socket assembly
RCA speaker jack assembly
9-pin tube socket assembly

BUILD. MODIFY. REPAIR.12
SECTION 8:
CIRCUIT BOARD ASSEMBLY
{Starting at one end of the front side of the
board, identify the necessary components for each
eyelet connection and place leads through the
eyelet holes. Once inserted, bend the leads under
the bottom of the board to hold them in place.
PRO Tip: When a capacitor and resistor are both
running between the same eyelet holes, you
can twist their leads around one another and
solder to form a solid mechanical connection.
{Once all components are in place on the
front side of the board, ip the board over and
start applying traces or jumper wires to the
backside of the board. These are illustrated
on your wiring diagram as striped lines
connecting different eyelet holes. Use your
YellowYellow cloth-covered wire and cut each piece
to size. Insert leads and bend around front of
eyelet board to secure them.
PRO Tip: Make a small hook with the wire so
that the wire “hooks” into the eyelet.
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8
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 8uF
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 16uF 8uF
16uF
500 Ω
25µF
+
500 Ω
25µF
+
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 8uF
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 16uF 8uF
16uF
500 Ω
25µF
+
500 Ω
25µF
+

13WWW.MOJOTONE.COM
{Once jumper wires are in place,
follow wiring diagram to create leads where
necessary. These will be the wires that go
out from the component board to other
components in the circuit. Insert these leads
down through the front of the board and bend
around back to secure.
PRO Tip: Use the included Wiring Diagram to
approximate lead lengths
{Once all components, jumpers, and leads
are in place, start at one end of the board
and begin soldering every eyelet EXCEPT
the eyelets with a red circle ( ). There will
be additional wires connected here once the
circuit board has been installed.
{Make Sure you don’t have any bad or
“cold” solder joints by lightly pulling each
wire after solder has set.
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 8uF
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 16uF 8uF
16uF
500 Ω
25µF
+
500 Ω
25µF
+

BUILD. MODIFY. REPAIR.14
SECTION 9:
TRANSFORMER WIRING
Power Transformer
{Twist all matching pairs of wires
coming out of the power transformer.
{Measure length needed for each wire,
allow yourself extra lead and cut to length.
This will eliminate excess wire and free up
space in your chassis. Apply this principle
to all leads.
{Prepare the two Red wires from the
power transformer (HV secondary). Connect
one wire to pin 4 and the other to pin 6 of the
5Y3 rectier tube socket (the octal socket
that is closest to the power transformer).
These wires carry AC voltage, so either wire
can go to either pin 4 or 6.
{Prepare the two YellowYellow wires from
the power transformer (5v rectifier
filament). Connect these two wires to the
top opening of pins 8 and 2 of the 5Y3
rectifier tube socket.
{Prepare the 2 Green wires from the
power transformer (6.3v tube lament).
Connect them to the indicator light.
{Prepare the Red and YellowYellow striped wire
from the power transformer and connect to
the ground tab.
{Now you will need to decide to use
vintage correct wiring or an updated modern
wiring for the power supply. When this circuit
was designed in the 1950s, typical electrical
outlets were not grounded so the chassis had
to be grounded by a capacitor tied to one side
of incoming A/C power cord. Now that it is
required that all electrical outlets in the US
and most other regions to be grounded, these
additional steps are unnecessary but will still
function properly and safely while retaining
the original wiring. Whichever wiring you
choose, be sure to follow the corresponding
instructions when installing the A/C power
cord on page 17.
{ForVINTAGE wiring of the power supply,
Prepare the Black and WhiteWhite wires coming
from the power transformer. One of these
will go to your fuse and one will go to the
bottom lug on the back of the potentiometer.
(It doesn’t matter which wire goes to either
component).
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TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
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5
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7
89
fuse
holder
rectier
tube socket
power
transformer
indicator
light
potentiometer

15WWW.MOJOTONE.COM
{For MODERN wiring of the power supply,
connect the Black wire from the power
transformer to the bottom lug on the back of
the potentiometer.
{The WhiteWhite wire will be connected to the
power cord once it is installed.
{Double check your wiring.
OUTPUT Transformer
{Primary is Blue and Red. Secondary is
YellowYellow.
{Connect the Blue wire from the output
transformer to pin 3 of the 6V6 octal socket
closest to the rectier.
{Connect the YellowYellow wire from the
output transformer to the tip lug of the
speaker jack.
{The Red wire from will be soldered to
the board once it has been installed.
{Double check your wiring and begin
soldering all connections in this section
EXCEPT for the indicator light. There will
be additional wires connected to it when
wiring the tube sockets.
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TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
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3
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5
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TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
rectier
tube socket
power
tube socket
RCA
speaker jack
power
transformer
potentiometer

BUILD. MODIFY. REPAIR.16
SECTION 10:
CIRCUIT BOARD
installation
{Locate the two small ber board mounting
holes drilled into the chassis.
{Tilt the chassis on it’s side and insert
the 6-32 screws from the top of the chassis
through to the outside.
{Holding the screws in place, insert the
backboard into the chassis, and push the
mounting holes down over the screws.
{Repeat with main component board.
{Use the 6-32 keps nuts and hand tighten
screws. Once in place, fasten down the
screws and nuts using a screwdriver and
adjustable wrench.
completed
circuit board
backer board

17WWW.MOJOTONE.COM
SECTION 11:
WIRING THE SOCKETS,
POT, jacks & Power cord
WIRING THE TUBE SOCKETS
{Follow the wiring diagram and begin
wiring the tubes sockets starting from the
rectifer tube and work your way across the
chassis towards the preamp tube. Note that
there is a jumper between pins 1 and 8 on the
6V6 power tube.
{Prepare the Red wire from the output
transformer and connect it to the board.
WIRING THE POTENTIOMETER
{Follow the wiring diagram and begin
wiring the “VOLUME” potentiometer.
{Connect the correct Green wire to the
ground lug.
INPUT JACK INSTALLATION AND WIRING
{Install the input jacks. Follow the
wiring diagram for the correct orientation.
{Install a 1MΩ resistor on the input jack
closest to the potentiometer. Connect to the
second jack with a jumper.
{Connect the YellowYellow wires to the input
jacks.
{Connect the Green wire the ground lug
on the input jack on the top right.
MOJO 760
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022 uF 0.022 uF
25 uF
+
470Ω
10 K
8uF 16 uF 8uF
MOJO 760
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022 uF 0.022 uF
25 uF
+
470Ω
10 K
8uF 16 uF 8uF
rectier
tube socket
ground lug
power
tube socket
RCA
speaker jack
pre-amp
tube socket
potentiometer
MOJO 760
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
1M
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022 uF 0.022 uF
25 uF
+
470Ω
10 K
8uF 16 uF 8uF
J12 input jack assembly input jacks

BUILD. MODIFY. REPAIR.18
WIRING THE HEATER FILAMENTS
{Connect one end of the 100Ω resistors to
each lug of the indicator light. Make sure that
either lead that is connected to the indicator
light does NOT touch the other or the bracket
that holds the assembly to the chassis.
Connect the other end of both resistors to the
top left eyelet on the berboard.
{Connect and solder one end of a Green
wire to each lug of the indicator light. Tightly
twist together enough of the Green wires to
reach to the 6V6 power tube socket and cut.
Connect one wire to the 2 pin and one to the
7 pin of the 6V6 power tube socket.
{Follow the Wiring Diagram and
begin wiring the heater filaments between
the tube sockets starting from the far left
power tube and working your way across
to the far right pre-amp tube.
PRo Tip: Since there is a jumper wire connected
to the 5 pin of the pre-amp tube socket,
you can achieve the jumper by stripping
the wire running to the 4 pin back further
and running it through to the 5 pin.
MOJO 760
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
1M
500 Ω
25µF
+
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10K
8uF 16 uF 8uF
100 Ω
100 Ω
power
tube socket
power
tube socket
indicator
light
pre-amp
tube socket
pre-amp
tube socket

19WWW.MOJOTONE.COM
INSTALLING & Wiring THE A/C POWER CORD
{Strip about 5” of the outer insulation
of the power cord.
{Insert stripped wires through the hole
in the bottom left corner of the chassis
next to the rectifier tube.
{Use the Black strain relief to clamp
around the power cord about 2” before the
portion that was stripped. Compress the
strain relief with an adjustable wrench or
needle nose pliers and carefully insert it
into the chassis until it locks in place.
{For VINTAGE wiring of the A/C power
cord, prepare the Black wire in the power
cord and connect it to the tip terminal of
the fuse holder.
{Prepare the WhiteWhite wire in the power
cord and connect it to the top lug on the back
of the potentiometer.
{Prepare the Green wire in the power
cord and connect it to the ground lug next
to the power transformer.
{For MODERN wiring of the A/C power cord
prepare the Black wire in the power cord
and connect it to the tip terminal of the
fuse holder.
{Prepare a length of Black wire and
connect one end to the top lug of the fuse holder
and the other end to the top lug on the back of
the potentiometer.
{Prepare the WhiteWhite wire from the power
transformer and slide a 1” - 2” length of heat
shrink tubing down it.
{Prepare the WhiteWhite wire in the power
cord and twist the end together with the end of
the WhiteWhite wire from the power transformer to
form a mechanical connection and then solder.
{Slide the heat shrink tubing over the solder
connection and apply heat with a small ame to
shrink it over the exposed wire to insulate.
{Double check your wiring and begin
soldering all connections in this section.
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
1M
500 Ω
25µF
+
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 16uF 8uF
100Ω
100Ω
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
1M
500 Ω
25µF
+
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10 K
8uF 16uF 8uF
100Ω
100Ω
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
1M
500 Ω
25µF
+
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10K
8uF 16uF 8uF
100Ω
100Ω
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
1M
500 Ω
25µF
+
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022uF 0.022uF
10K
8uF 16uF 8uF
100Ω
100Ω
12
3
4
56
7
8
12
3
4
56
7
8
TWEED CHAMP Layout Model 5F1 Revision 2.2 09/10/2019
1
2
3
4
5
6
7
89
1M
220K
68K
68K
100K
100K
22K
22K
1.5 K
1.5 K
0.022 uF 0.022 uF
25 uF
+
470Ω
10 K
8uF 16 uF 8uF
100 Ω
100 Ω
fuse
holder
fuse
holder
potentiometer
potentiometer
ground lug
A/C power cord
A/C power cord
ground lug

BUILD. MODIFY. REPAIR.20
SECTION 12:
Speaker Wiring &
Installation
SPEAKER WIRING
{Twist the two 15” lengths of Black and
WhiteWhite 18 gauge stranded wire together.
{Prepare the Black and WhiteWhite wires and
solder them to the RCA plug, WhiteWhite to center
and Black to shield. Trim excess wire from
the tip of the plug.
{On the other end of the wiring harness,
prepare the wires and make a “hook” with a
pair of needle nose pliers.
{Insert the WhiteWhite wire “hook” into
the positive (+) terminal on the back of
the speaker. Use the needle nose pliers to
carefully crimp the “hook” on the terminal,
forming a mechanical connection. Then
solder the wire to the terminal. Repeat the
same process with the Black wire on the
negative (-) terminal.
SPEAKER INSTALLATION
{Remove the upper and lower back panel of
the cabinet.
{Remove the four keps nuts from the
speaker studs on the bafe.
{With the cabinet laying face down, line
up the mounting holes on the speaker with
the studs on the bafe and carefully install the
speaker onto all four studs at the same time.
{Finger tighten the mounting speakerscrews
starting with the top left screw, tighten with a
screwdriver, then tighten the screw diagonally
from it. Then tighten the remaining screws in
the same way.
upper
back panel
lower
back panel
RCA plug