WhitakerAudio J C Whitaker 20 W Stereo Audio Amplifier, Manual

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20 W Stereo Audio Amplifier
– Connect L51in – choke in. Find one of the black wires from the power supply choke
(L51). Check to see if the lead will comfortably reach the L51in terminal on the rectifier
PWB. If it will, install a connector to the wire and make the attachment. In the event that
the lead is not long enough to reach the L51in post, install a butt-splice connector to the
lead. Cut a section of #22 red 600 V hookup wire sufficient to reach the rectifier board.
Crimp both ends of the splice and cover with a 1.5-inch piece of small heat-shrink tubing.
Process (heat). Attach a quick-disconnect connector to the end of the red wire. Attach to
the L51in post on the rectifier PWB. Route the cable from the choke to the rectifier PWB
using the available cable clamp at the rear of the chassis.
– Connect L51out – choke out. Find the remaining black wire from the power supply
choke. As with the other lead from L51, check to see if the wire will reach the L51out
terminal on the rectifier PWB. If so, install a connector to the wire. If not, use the
procedure detailed previously to extend the wire. Attach to the L51out post on the left
channel PWB. Route the wire through the available cable clamp.
– Attach the black ground lead from the case of L51 to the ground lug at the rear of the left
channel PWB. Do not solder. Route the wire through the available cable clamp.
Double check the connections from the choke to the circuit boards.
5.6.8 PWB Interconnections
In the following steps the necessary connections will be made between the right channel, left
channel, and rectifier PWBs.
– Prepare two hookup wires as follows: #18 green, 30 inches, and #18 brown, 30 inches.
This wire can be found in the Filament Wire package in the chassis box. Tightly twist the
two wires together along their length.
– Route the green/brown twisted pair to the rectifier PWB through the cable clamps at the
rear or the chassis.
– Install a quick-disconnect connector on the green #18 wires and attach to the 6VH1 post
on the right channel PWB.