WhitakerAudio JC Whitaker 20 W Stereo Integrated Audio Amplifier, Manual

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WhitakerAudio
– Install R21 – 825
Ω
, 0.5 W . Solder in place. Note that the form factor of this component is
typically larger than a common 1/2-watt resistor. It may be necessary, therefore, to mount
this component about 1/8-inch above the PWB in order to accommodate the leads.
– Install R22 – 220 k
Ω
, 0.5 W . Solder in place.
– Install R23, R24 – 15 k
Ω
, 2 W, 1% . Solder in place, providing about 1/4-inch clearance
above the board.
– Install R25, R58 – 3.9 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above
the board.
– Install R26, R27 – 100 k
Ω
, 0.5 W, 1% . Solder in place.
– Install R28, R29 – 1 k
Ω
, 0.5 W, 1% . Solder in place.
– Install R42, R52 – 220 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance
above the board.
– Install R53 – 270 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above the
board.
– Install R54, R56 – 47 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above
the board.
– Install R59 – 270
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above the
board.
– Install R60 – 3.9
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above the
board.
Clean the soldering iron tip.
– Install C7 – 47 µF, 450 V electrolytic . Solder in place. Be certain to observe proper
polarity.The positive terminal of the device connects to the square pad on the PWB. This
same convention is used for all other electrolytic capacitors on the board.
– Install C8, C10, C11 – 0.22 µF, 400 V, 5% . Solder in place.
– Find C9 – 3.3 pF, 1000 V, ceramic or mica . Set aside for now.
– Install C14 – 20 pF, 1000 V, ceramic . Solder in place.