Elecraft KX1 Manual - Manual (Page 39)

38
E
LECRAFT
Install remaining filter crystals using the same procedure you
used for X2.
_ X3 (4.9136)
_ X4 (4.9136)
_ X5 (4.9136)
Turn the board so the bottom face is up with J1 in the upper right
corner and locate the printed outline for antenna jack J2 in the upper
left corner.
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The next step requires an unusually large amount of heat
for soldering. Use a larger soldering tip if available.
Position jack J2 on the board so it is sitting within the printed
outline as shown in Figure 15.
Figure 15. Installing J2.
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Be certain the jack is mounted on the BOTTOM face of
the circuit board as shown. It is very difficult to remove this jack
without damaging the board if it is installed incorrectly.
Solder the center pin lead and recheck the alignment.
Without disturbing the alignment of the jack, solder one of the
heavy ground nubs to the board. Then re-check the alignment. Reheat
the nub, if necessary, to correct any misalignment.
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The case will not close during final assembly if the jack is
not aligned as shown.
Solder the second nub on the jack and make a final alignment
check.
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If you fitted your soldering iron with a larger tip to install
J2, replace it with a fine tip now.
Turn the board face up with KX1 in the upper left corner.
Fit headphone jack J4 in the printed outline in the lower right
corner. The jack has six plastic nubs that hold it up off of the board
slightly. The pins will be flush with the solder pads on the bottom of
the board.
Solder one pin and carefully recheck the position of the jack to
be sure all the plastic nubs are against the board. If necessary, reheat
the soldered pin while pressing down on the jack.
Solder the remaining pins. Be careful working around R15 and
R25 with your soldering iron.