ELECRAFT KBPF3 Specifikace stáhnout pdf (Strana 10)

There are three connectors on the bottom of the KBPF3 board that must be properly mated to P44A, P44C

and P44E on the RF board. Even though the connectors are hard to see, they can be aligned as follows:

Set the KBPF3 board in place over the standoffs, aligning it so the holes in the KBPF3 board

are aligned with the tops of the standoff. This will align the connectors.

Press down on the KBPF3 board to mate the connectors at the end near battery BT1 and along

the side nearest the LPA board or, if installed, the KPA3 shield, while checking to ensure that

the holes in the board are aligned with the holes in the standoffs. Note that simply installing the

mounting screws will not ensure the 3-pin connectors are fully mated. When properly mounted

the KBPF3 board should rest on top of the standoffs and be parallel with the RF board

underneath.

Attach the KBPF3 board with a 4-40 1/4” (6.4 mm) zinc pan head screw and lock washer at

each standoff as shown in Figure 4.

NO LOCK WASHER

BETWEEN KBPF3 BOARD

ND STANDOFF

4-40 SPLIT LOCK WASHE

4-40 1/4" (6.4mm) ZINC PAN HEAD SCREW

ESD SENSITIVE!

WEAR A GROUNDED

WRIST STRAP OR TOUCH

AN UNPAINTED METAL GROUND

BEFORE HANDLING THE RF BOARD.

KBPF3 BOARD

Figure 4. Mounting the KPBF3 Board.

Replace both bottom covers using the 4-40 black pan head screws you removed earlier. Note that three

locations take the 4-40 1/4” (6.4 mm) black pan head screws with lock washers as shown in Figure 2 while the

remainder are 4-40 3/16” (4.8 mm) screws . Be sure these are in the correct locations!

CAUTION!

Failure to replace the three 1/4” (6.4 mm) screws with their lock washers in the

locations shown in Figure 2 may destroy power transistors in your K3!

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ELECRAFT KBPF3 Specifikace Strana 10