©Mojotone
®
Tweed Super
®
Style Amp Kit Manual 2012
Page 4
Internal Wiring
•
Follow the color coded wiring diagram closely, twist the filament wires (6.3v heater wires) together from
transformer and between tube sockets to reduce hum from 120ac voltage.
•
Have enough of the power cord inside chassis to reach fuse, switch and ground
•
Affix the floating fiberboard, noting it is held in place by the wires, attach backing with rubber cement if
necessary (or mount directly to chassis)
•
Place entire fiberboard inside the chassis noting the orientation (see schematic)
•
Connect corresponding wires to hardware, try to keep wire short and runs as neat as possible. This will
help make future troubleshooting and repair easier.
•
On Standby Switch, solder (1) 0.047uF @ 600V cap to left lug and ground.
•
Solder (2) ½ W 100 Ohm resistors - solder from the pilot light to ground
•
Solder (1) ½ W 1 Meg resistor from Input 1 to ground tied to Input 2. This grounds the input of the amp so
that no hum or noise picked up by the amp when the guitar cable is unplugged.
•
On the Bright Volume potentiometer, (looking from the back with the lugs pointing up), solder a 100pF cap
from the center lug to the right lug. Solder the left lug to ground. The 100pF cap accomplishes a bypass to
brighten the tone. The higher the value of the cap, the brighter the sound.
•
On the Presence potentiometer, solder a 0.1uF @ 600V to the center lug and to ground. Solder left lug
to ground. The Presence is a power amp control that effects the amount of high end (or treble) frequency
coming from the power amp section of the amp.
•
On each power tube socket, solder (1) ½ W 1.5K ohm grid resistor from pin 5 to 6.
•
Try to avoid crossing wires over each other.
•
Before you plug the amp in check and re-check your wiring.
If you are not clear on any part of the
circuit, ask someone.
Photo 7 - Internal Wiring
