WhitakerAudio 60 W Stereo Power Amplifier, User And Assembly Manual

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WhitakerAudio
– Install R14 and R15 – 1 k
Ω
, 0.5 W . Solder in place.
– Identify R16 – 200
Ω
, 0.5 W . Set this component aside with the chassis parts. It will be
installed later.
– Install R17 and R18 – 100 k
Ω
, 2W . Solder in place, providing about ½-inch clearance
above the board.
Clean the soldering iron tip.
– Install C1 – 25 µF, 50 V , electrolytic. Solder in place, observing proper polarity.
– Install C2 – 22 pF, 600 V, ceramic . Solder in place.
– Install C3 and C7 – 180 µF, 450 V, electrolytic . Solder in place, observing proper
polarity. After each device is inserted into the board, bend the leads over onto the foil
trace; then solder. Use sufficient solder to fill the foil side of the mounting pad. Be careful
to not use too much heat as that may damage the capacitor.
After soldering the capacitors in place, double-check your work. Note that the negative (–)
terminals all face the same direction on the PWB.
– Install C4 and C5 – 0.22 µF, 600 V . Solder in place.
– Find C6 – 0.015 µF, 200 V . Set this component aside. It will be installed later on the
speaker terminal PWB.
– Install C8 and C9 – 0.01 µF disc, 1 kV . Solder in place.
– Install C10 – 0.01 µF, 100 V ceramic . Solder in place.
– Install the four-terminal Molex barrier strip. Solder in place.
– Mount the two 4 terminal Molex contact headers at the Conn1 and Conn2 positions.
Solder in place.
– Find tubes V1, V2, and V3. Set them aside in a safe place. The tubes will be installed
during the final checkout process.
– Find the quick-disconnect connectors. Set them aside; they will be used later.