ELECRAFT KRX3 Betriebsanleitung PDF herunterladen (Seite 36)

Remove jumper W4 from connector J64A on the K3 RF board. J64A is near the KIO3 board as shown in

Figure 45. On some older RF boards, W4 is a jumper soldered between two pads on the board itself. If your

board has a hard-wired jumper, cut it with diagonal cutters and completely remove the ends so they cannot short

to the ground plane or nearby pads. If you ever want to operate your K3 with the KRX3 subreceiver removed,

make up a jumper and insert it in J64A as shown in the figure.

Figure 45. Jumper W4 on the K3 RF Board.

Plug the SUBIN interface board into J64A on the K3 RF board as shown in Figure 46. J64A is directly in

front of the KIO3 board in the rear left corner of the K3. Be certain the connector on the SUBIN board is aligned

with J64A so all pins are engaged.

Figure 46. Mounting the SUBIN Interface Board.

Locate J64B on the K3 RF board. It is between the crystal filters and the front panel shield that holds the

KREF3 and KSYN3 boards. J64B should have a plug in the third hole matching a missing pin on the SUBOUT

connector P1. The plug is shown on the Keying the KRX3 SUBOUT Connector instruction sheet provided with

the kit. If it is not present, install it according to the instructions.

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ELECRAFT KRX3 Betriebsanleitung Seite 36