Elecraft KX1 Manual User Manual

Page 32

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LECRAFT

31

Install the following inductors below R6 and R7 in the upper right

quadrant.

_ L4, micro (smaller) size, 2.2 µH (red-red-gold)

_ L5, mini size, 5.6 µH (grn-blu-gold). L5 may be larger than

the outline. Bend the leads to fit into the pads with the body
of L5 pressed to one side against the board. Do not space L5
above the board or it may strike other components when the
K3 is assembled.

Turn the board face up with KX1 in the upper left corner.

Install the following inductors to the left of U3 on the right side of

the board.

_ L7, mini (larger) size, 4.7 µH (yel-vio-gold)

_ L6, mini (larger) size, 6.8 µH (blu-gry-gold). If you have the

KXB3080 module to install, mount L6 on the bottom of the
PC board as shown in the KXB3080 module instructions. If
the lead spacing on L6 is larger than the hole spacing in the
board, bend the leads back under L6 to fit in the holes.

Install the following inductors below R19 near the center of the

board.

_ L10, micro size, 33 µH (org-org-blk). L10 may be larger than

the outline. Bend the leads to fit into the pads with the body
of L10 pressed to one side against the board. Do not space
L10 above the board or it may strike other components when
the KX1 is assembled.

_ L8, micro size, 18 µH (brn-gry-blk)

_ L9, micro size, 100 µH (brn-blk-brn)

i

In the next step you will install a diode which must be

oriented in the proper direction. Be certain to align the banded
end of the diode over the band on the circuit board.

Install diode D4 (1N4148) on the lower edge of the board to the

right of L9.

Install varactor D5 (1SV149) as follows. When you are finished

the top of the varactor must no be more than 5/16” (7.9 mm) above the
board.

_ Locate the outline for D5 on the board. It is near the center of

the board immediately to the right of resistor pack RP5.

_ Orient the varactor according to the printed outline on the

board. The varactor may have a beveled back instead of a
rounded back as shown on the board (See Figure 10).

_ Insert the varactor leads in the solder pad holes. The varactor

has a third lead that has been clipped close to the body. Space
the varactor up off of the board slightly to ensure this lead
does not short to the board.

_ Solder one lead, then check to ensure that the top of the

varactor is no more than 5/16” (7.9 mm) above the board. If
necessary, reheat the joint while adjusting the height of the
varactor.

_ Solder the second lead and trim both leads.

Follow the same procedure to install varactor D6 (1SV149). D6

is located above D5.

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