ELECRAFT KBPF3 Dokumentacja Pobierz pdf (Strona 9)

Install two standoffs on the RF board as shown Figure 4. Be sure you place a split lock washer under the

head of the screw and between the standoff and the board as shown.

TOP OF RF BOARD

4-40 1/2" (13 mm) STANDOFF

4-40 SPLIT LOCK WASHER

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.

Figure 4. Installing KBFP3 Standoffs.

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 3 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) bottom screws with their lock washers in

the locations shown in Figure 3 may destroy power transistors in your K3!

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ELECRAFT KBPF3 Dokumentacja Strona 9