Raleigh Audio RAKK dac Mark III Extreme Preamplifier Assembly Manual page 10

4. Wire the high voltage:
• Make a twisted-pair from two pieces of #20 red wire, one 9½" long and one 9¾" long.
Align the wires evenly at one end.
• Connect the longer wire at the uneven end to pin 17 on the power transformer.
• Connect the shorter wire to pin 15 on the power transformer.
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5. Connect the center tap in the following manner:
• Prepare a 12" piece of #20 black wire and strip 1" from one end. Connect the tip of this
end to pin 24 and then wrap the bare wire around pin 22. Solder both pins.
• Dress this wire towards pin 15 and wrap it around the red twisted pair following the lay
of the twist.
• Trim the black wire to be the same length as the two red wires.
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6. Wire the filament power
• Make a twisted-pair from two pieces of #20 grey wire, one 5" long and one 7¼" long.
Align the wires evenly at one end.
• Connect the longer wire at the uneven end to pin B1 on the power transformer.
• Connect the shorter wire to pin B6 on the power transformer.
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7. Wire the power indicator
• Cut the leads of the 22K (red, red, black, red, brown) resistor to be ½" long. Form a
loop, or hook, on each lead.
• Solder one end of the resistor to pin B2. Lay the resistor flat on the transformer
pointing towards the center of the transformer. You may choose to secure the resistor
with a drop of adhesive.
• Make a twisted-pair from two pieces of #22 black wire, one 10½" long and one 11½"
long. Align the wires evenly at one end.
• Connect the uneven end of this twisted-pair to the power
transformer: shorter wire to pin B5, and longer wire to the open end of the resistor.
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