HF PackerAmp V4, Руководство по монтажу

Страница: 25 / 76

HF PACKER
AMP
V4R6 Page 25
The RF Output cable is best fabricated on the bench and then
installed in the amplifier.
•
The cable type is RG174. Length is 11 inches.
•
The shields on both ends are connected to 1.5 inch
TEF #24 black hookup wire. Heat sink the shield when
soldering the wire to the shield so the inner conductor
is not melted.
•
Thread on four 23-43 cores on the wire near the end to
be attached to a three pin Molex connector, J4. Cover
with black heat shrink to hold the cores in place.
•
Use 1/4 inch of black heat shrink on the wire ends to
cover the bare shields.
•
Attach the cable to the SO-239 connector being careful
to keep the wire straight so the center conductor
insulation is not melted. Thread a short length of red
heat shrink over the center conductor. Heat the red
heat shrink with a heat gun to constrict around the wire.
•
Crimp the black #24 TEF hookup wire and attach to a
red #4 ring terminal. Follow up by soldering the
connection.
•
Attach connector to rear panel using two 4-40 x ¼ inch
screws, one split lock washer and two 4-40 nuts.
•
Attach a 12 inch length of #24AWG Teflon coated
hookup wire (white) to the PTT connector on the rear
panel.
•
This wire is routed along with the output cable and
terminated into the 3-pin connector, J4.
•
The cable is routed along one edge under the circuit
board to relieve cable congestion in the box.
Low Pass Filter Input Cable Fabrication
•
Cut a 5 inch length of the RG174 cable. Twist the
shields and cut to ¼ - 3/8 inch length.
•
Cut two ½ inch lengths of the black ¼ inch heat shrink
tubing for bare wire covering.
•
Tin the end. Use a heat sink clamp next to the coax so
the heat does not reach the center conductor.
•
Cut two 1 3/8 inch lengths of black #24 AWG Teflon
coated wire.
•
Strip the insulation from both ends 1/8 inch or slightly
longer. Tin one end. The other end is crimped to
terminal pins.
•
Solder the black wires to the shields. Use a heat sink
clamp next to the coax so the heat does not reach the
center conductor.