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9
On the output transformer the Red, Blue and Brown
wires are the primary and the Black, Yellow, Green
and Orange are the secondary.
Twist the Blue and Brown wires together and run
them between the two output sockets.
Prepare and connect the Brown wire to the 7 pin of
the output tube socket closest to the power transformer.
Prepare and connect the Blue wire to the 7 pin of the
output tube socket furthest from the power transformer.
Prepare and connect the Red wire to the left
(+) terminal of the can capacitor that is installed
between the rectier socket (EZ81) and the power
tube socket (EL84).
Run the secondary wires toward the rear panel
where the impedance selector will be installed.
Double check wiring and begin soldering.
POWER TRANSFORMER SCHEMATIC OUTPUT TRANSFORMER SCHEMATIC
RED (12”)
GREEN (12”)
GREEN (12”)
RED (12”)
RED/YELLOW (12”)
GREEN/YELLOW (12”)
WHITE (12”) 6V 2A
YELLOW/WHITE (12”) 5V 2A
YELLOW(12”) 0V
290V @ 120MA
290V @ 120MA
6.3V @ 3A
240V
BLACK/RED (12”)
0V
BLACK (12”)
120V
BLACK/WHITE (12”)
FOR 120V OPERATION: USE BLACK LEAD AND BLACK/WHITE LEAD
FOR 240V OPERATION: USE BLACK LEAD AND BLACK/RED LEAD
BLUE (12”)
RED (12”)
BROWN (12”)
ORANGE 16Ω (12”)
GREEN 8Ω (12”)
YELLOW 4Ω (12”)
BLACK 0 (12”)
pro tip: SOLDERING BASICS
Prepare the joint to be soldered. Strip PVC coating
1
/
2
‘‘ from end of wire, hook your leads into lugs or
turrets, twist leads together, etc.
Tin (apply solder to) the tip of the soldering iron.
This will keep it from oxidizing and prolong the life
of your soldering tip. Wipe excess on sponge.
Clean the tip often while soldering. This will help
the iron heat more consistently and evenly.
Be sure to use clamps or tweezers if needed to
hold the components to be soldered in place.
Touch the iron directly on the joint to be soldered
for about two seconds to get it hot enough to melt
the solder.
Touch the solder to the joint. As it melts let it ow
onto the joint to create a solid bond.
Lift the solder off rst and then remove the iron
from the component.
Another method is to tin the stripped wire and then
touch it directly to the heated component. Some
wires will be pre-tinned. They will have a shiny
silver layer twisted around the wire.
SOLDERING IS AN ESSENTIAL SKILL FOR EVERY LEVEL OF AMP BUILDER. HERE ARE A FEW TIPS FROM THE AMP PROS AT MOJOTONE.
SAFETY FIRST! THE SOLDERING IRON TIP REACHES A TEMPERATURE OF 400˚
C
SO NEVER DIRECTLY TOUCH IT OR ANY COMPONENT THAT YOU ARE SOLDERING WHEN IT IS
HEATED. ALWAYS WORK IN A WELL VENTILATED AREA.
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