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Make the following connections between the shielded cables and the RCA jacks:
1.
Right channel signal conductor (red) to center of right channel RCA jack.
2.
Right channel ground conductor (drain wire covered with a bit of reserved gray
jacket insulation) to the ground lug of the right channel RCA jack.
3.
Left channel signal conductor (black) to center of left channel RCA jack.
4.
Left channel ground conductor (drain wire covered with a bit of reserved gray
jacket insulation) to the ground lug of the left channel RCA jack.
For both the right and left channels, connect a 0.01 µF 400 V capacitor between the
chassis ground lug and the RCA ground lug. Figure 7 shows this connection for the left
channel. The right channel is connected similarly. Note that the white wire shown
connects to the jack-field grounds (or the associated RCA jack lugs) and pin 5 of the
selector switch. Also note: your 0.01 µF cap may look different than the one pictured.
Figure 7-Connecting Left Channel input jack and 0.01 µF capacitor
Move Power Wires
At this point, +17.5 V, -17.5 Volt power and ground wires run from the PAT4PWR board
to the phono section of the original preamp PCBs. We will instead run those power wires
to the new PCB.
Clip or de-solder the wires currently going to eyelets 3, 4, and 8 of the original
PCB closest to the front panel.
Clip or de-solder the wires currently going to eyelets 3, 4, and 8 of the original
PCB closest to the rear panel.
De-solder the far-ends of the wires just removed from their connections to the
PAT4PWR board. Clear the associated holes on the PAT4PWR board using your
preferred method (for example, the toothpick trick).
Form a twisted pair from the supplied red and black 22 AWG wires. Connect:
o
Red wire to the P17P5 eyelet of the PAT4PWR
o
Black wire to the associated GND eyelet
o
The other end of the Red wire to the POS17P5 eyelet of the new phono
preamp.
o
The other end of the black wire to the PGND eyelet of the new phono
preamp.
Connect a purple 22 AWG wire from the N17P5 eyelet of the PAT4PWR board to
the NEG17P5 eyelet of the new phono preamp.