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Page 66
CHAPTER TEN
SECTION 10.3
COAX SWITCH HOUSING (continued)
ATTACH THE COAX JUMPERS & FEED LINE
Figure 10.30
shows the coax switch housing with the appropriate coax connections. The table in
figure
10.31
identifies the orientation of the feedline and the three coax jumpers. Route the coax jumpers along
the boom, being careful to avoid placement on sharp edges. Secure with electrical tape.
Taping of the coax jumpers and control cable to the boom should be one of the last items done
before mounting the DB42E onto the mast. The coax jumpers will need to be disconnected
during the wiring testing covered in Chapter .
Figure 10.32
shows how the coax jumpers should be routed to each EHU. NOTE: The drawing shows the
coax jumpers as being below the boom—this is for illustration purposes only. The coax jumpers should be
taped against the antenna boom. It is a good idea to label each coax jumper in case you ever need to re-
move them. As a last step we recommend waterproofing the PL259 connectors using the included coax-
seal. It is a good idea to first put a layer of tape over the PL259’s and apply the coax-seal over the tape for
ease of removal, should it prove necessary. Do not do this step until the entire antenna has been tested
and is ready to put up on the tower.
FIG. 10.30
COAX SWITCH
SO239 CONNECTOR
FIG. 10.31
COAX PURPOSE
JUMPER
LENGTH
IN
FEEDLINE FROM SHACK
NA
OUT 1
COAX JUMPER TO DRIVEN EHU
15 ft
OUT 2
COAX JUMPER TO DIRECTOR 2 EHU
11 FT 6 IN
OUT 3
COAX JUMPER TO DIRECTOR 1 EHU
8 FT
OUT 2: 11 ft 6 inch (PN 21-6301-96)
OUT 3: 8 ft (PN 21-6301-80)
OUT 1: 15 ft Coax Jumper (PN 21-6301-98)
DIR1
DIR2
DRV
Coax IN (if no 80m dipole
)
FIG. 10.32