WhitakerAudio 60 W Stereo Power Amplifier, User And Assembly Manual

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WhitakerAudio
– Replace the standoff removed from the V1 socket. The screws should be finger-tight.
Remember to include the lockwasher on the component side of the board. The heater leads
should straddle the standoff.
– Twist the wires together and route to socket V3 (see Figure 5.2 d for placement). The wires
should be placed at socket-level. In this way they will be resting against the chassis when
the board is inserted in the chassis. Do not dress the wires against the PWB as this may
increase hum in the output of the amplifier.
– Trim the wire lengths as needed to comfortably reach V3. As before, slip a piece of 1/2-
inch long heat-shrink tubing over each wire. Crimp one wire on pin 2, and then crimp the
other on pin 7. Do not solder.
– Cut two 6-inch pieces of #22 green heater wire. Slip one through the heat-shrink tubing on
the lead already connected to pin 2 of V3. Route the wire to the pin and crimp in place.
Solder, keeping the heat-shrink tubing away from the hot wires and the soldering iron.
Slip the other wire through the heat-shrink tubing on the lead already connected to pin 7 of
V3. Route the wire to the pin and crimp in place. Solder, keeping the heat-shrink tubing
away from the hot wires and the soldering iron.
– Slide the heat-shrink tubing into position at the base of the socket. Apply a stream of hot
air to shrink the tubing over the pins. Be careful to not use too much heat.
– Twist the wires together and route to socket V2 (see Figure 5.2 d for placement). The wires
should be placed at socket-level. Do not dress the wires against the PWB.
– Trim the wire lengths as needed to comfortably reach V2. As before, slip a piece of 1/2-
inch long heat-shrink tubing over each wire. Crimp one wire on pin 2, and then crimp the
other on pin 7. Do not solder.
– Cut two 6-inch pieces of heater wire. Slip one through the heat-shrink tubing on the lead
already connected to pin 2 of V2. Route the wire to the pin and crimp in place. Solder,
keeping the heat-shrink tubing away from the hot wires and the soldering iron. Slip the
other wire through the heat-shrink tubing on the lead already connected to pin 7 of V2.
Route the wire to the pin and crimp in place. Solder, keeping the heat-shrink tubing away
from the hot wires and the soldering iron.