Elecraft KBT2 - Manual (Page 6)

6
Wrap and solder one end of the 3” (7.5 cm) red wire to the anode of the diode (at the right end of the
diode/resistor assembly as shown in Detail B). Clean up any protruding wire strands that might tear the
heatshrink tubing.
Solder the other end of this wire to a FAST-ON terminal. (Flow solder into the cylindrical part of the
FAST-ON, avoiding the plastic insulator.) Do not connect the diode/resistor assembly to the (+) battery
terminal at this time.
Wrap and solder one end of the 7.5” (19 cm) red wire to the cathode of the diode (banded end).
When working with a heat gun or other source of heat in the following steps, be sure to stay well
away from the battery, flammable liquids, etc. The diode/resistor assembly should NOT be attached
to the battery at this point in the installation.
Slip a 2” length of heatshrink tubing over the diode/resistor assembly as shown in Detail B. Position
the tubing so that it completely covers all exposed wiring at either end.
Shrink the tubing using a heat gun. (If a heat gun is not available, you may use a cigarette lighter or
match. Remember to stay clear of the battery.)
Position the diode/resistor assembly between the battery and speaker as shown in Figure 3.
Solder the free end of the 7.5” (19 cm) red wire to the right-hand terminal of the battery switch.
Solder one end of the 12” (30.5 cm) red wire to the left-hand terminal of the battery switch.
Solder one end of the 7” (18 cm) black wire to a FAST-ON terminal. Do not connect the black wire
to the (-) battery terminal yet.
Solder the free end of the black wire to a female crimp terminal..
Solder the free end of the 12” (30.5 cm) red wire to a female crimp terminal.
Insert the wires with the crimp terminals into the female connector housing (battery connector) as
shown at the left side of Figure 3. Verify that the black wire is on the left, with the plastic nubs on the
housing facing down.
Connect the FAST-ON terminal on the black wire to the (-) terminal of the battery. Connect the
FAST-ON terminal at the end of the diode/resistor assembly to the (+) terminal of the battery.
Use cable ties to secure the red and black wires at approximately the locations shown in Figure 3.