WhitakerAudio J C Whitaker 20 W Stereo Audio Amplifier, Manual

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• Find the black/yellow lead from the power transformer. Install a quick-disconnect
terminal to the wire. This wire is not connected. Secure with a tie-rap so it does not make
contact with any open circuits.
The following steps assume a line input voltage of 120 V ac.
– Connect N-2 – AC neutral to T51. Find the brown lead from the power transformer.
Install a connector to the wire. Attach to the N-2 post on the right channel PWB. Route the
wire below the cable to output transformer T1.
– Connect N-3 – AC neutral to T51. Find the white lead from the power transformer. Install
a connector to the wire. Attach to the N-3 post on the right channel PWB. Route the wire
below the cable to output transformer T1.
– Connect Hot-4 – AC hot to T51. Find the blue lead from the power transformer, T51.
Install a connector to the wire. Attach to the Hot-4 post on the right channel PWB.
– Connect Hot-5 – AC hot to T51. Find the black lead from the power transformer, T51.
Install a connector to the wire. Attach to the Hot-5 post on the right channel PWB.
– Connect the NC terminals – T51 primary windings not used for 120 V operation. Connect
the following wires to any of the available NC terminals on the right channel PWB:
• Blue/yellow
• Brown/yellow
• Black/red
• White/black
– Connect the ground wire from power transformer T51 to the available ground lug on the
rear corner of the left channel PWB. Do not solder.
Double-check the connections from the power transformer to the three PWB.
5.6.7.5 Choke Leads
In the following steps, trim the lead lengths so the wires will comfortably reach their respective
terminals. After each terminal is attached to a lead, gently pull on the wire and terminal to make
sure a good crimp has been made.