Raleigh Audio Premium Extreme RAKK dac, Assembly Manual

Page: 19 / 65

Pre ­ wire the Power Transformer
For the following steps, refer to the LL1683 Data sheet .
————————————————————————————
1.
Wire the transformer for your Mains line voltage:
115VAC:
•
Connect pin 2 to pin 12 with a #20 black wire.
•
Connect pin 4 to pin 10 with a #20 black wire.
230VAC:
•
Connect pin 4 to pin 12 with a #20 black wire.
————————————————————————————
2.
Wire the high voltage:
•
Make a twisted-pair from two pieces of #20 red wire, one 7½” long and one 7¾” 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.
————————————————————————————
3. Connect the center tap in the following manner:
•
Prepare a 10” 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.
————————————————————————————
4. Wire the tube filament power
•
Make a twisted-pair from two pieces of #20 grey wire, one 7” long and one 9¼” 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.
————————————————————————————
18