WhitakerAudio J C Whitaker 20 W Stereo Audio Amplifier, Manual

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103
20 W Stereo Audio Amplifier
– Feed the 5-inch piece of small-sized sleeving onto the secondary (green) windings from
transformer T301 (the preamplifier power supply filament transformer). Place one piece
of heat-shrink tubing on each end of the sleeving. Process with the heat gun. Be careful to
focus the heat on the heat-shrink tubing, not the sleeving.
5.6.7.2 Right Channel Output Transformer Primary Leads
In the following steps, trim the transformer lead lengths so the wires will comfortably reach their
respective terminals. Note that the sleeving containing the primary leads from T1 will rest against
the bottom chassis plate. After each terminal is attached to a lead, gently pull on the wire and
terminal to make sure a good crimp has been made.
– Connect PL1 – output transformer plate 1 connection. Find the blue wire from the right
channel output transformer (T1). Install a connector to the end of the wire. Attach to the
PL1 post on the right channel PWB.
– Connect SC1 – output transformer screen 1 connection. Find the blue/yellow wire from
the right channel output transformer. Install a connector to the end of the wire. Attach to
the SC1 post on the right channel PWB.
– Connect PL2 – output transformer plate 2 connection. Find the brown wire from the right
channel output transformer. Install a connector to the end of the wire. Attach to the PL2
post on the right channel PWB.
– Connect SC2 – output transformer screen 2 connection. Find the brown/yellow wire from
the right channel output transformer. Install a connector to the end of the wire. Attach to
the SC2 post on the right channel PWB.
– Connect T1ct – output transformer center tap. Find the red wire from the right channel
output transformer. Install a connector to the end of the wire. Attach to the T1ct post on
the right channel PWB.
Double-check the connections from the right channel output transformer to the PWB.
5.6.7.3 Left Channel Output Transformer Primary Leads
In the following steps, trim the transformer lead lengths so the wires will comfortably reach their
respective terminals. Note that the sleeving containing the primary leads from T2 will rest against