Elecraft KX1 Manual - Manual (Page 18)

E
LECRAFT 17
Insert RP5 with Pin 1 of the pack in the round solder pad. The
round pad is farthest from the edge of the board.
i
Be careful to orient the resistor packs so the dot next to
Pin 1 on the pack is at the round solder pad on the board. Once
soldered in place, it is almost impossible to remove the pack
without destroying it.
Wet your soldering iron with a small amount of solder, and touch
it to one of the pins to tack-solder it in place.
Check the position of RP5 to verify that the pins at both ends are
inserted as far as they will go into the board as shown in Figure 4, then
solder and trim all ten leads.
Follow the same procedure to install six-pin resistor pack RP2, 1K
(102) above and to the left of RP5. Pin 1 goes at the top pointing
toward the printed outline for C51.
Install ten-pin resistor pack RP4, 10k (103) below U2 in the top
left quadrant of the board. Pin 1 goes to the left, pointing toward the
outline for RP3.
Install ten-pin resistor pack RP3, 10k (103) to the left of RP4. Pin
1 of RP3 is at the top, nearest the end of RP4.
Locate resistor pack RP1, 390 ohms (391). RP1 is in a 16-pin DIP
package that looks much like an integrated circuit. The resistance
elements run across the package (e.g. pin 1 connects to 9 through 390
ohms).
Test fit RP1 between RP2 and RP3 and just below the outline for
DS1 on the circuit board. It is normal for the pins of a DIP package to
be slightly flared so they do not easily fit into the solder pad holes. If
necessary, place RP1 so that an entire row of pins is against a smooth
surface and straighten the pins as shown in
Figure 5.
FLARED
STRAIGHT PRESS AND
ROCK TO
STRAIGHTEN
Figure 5. Straightening IC Pins.
Place RP1 on the circuit board with pin 1, indicated by a dot on
top of RP1, in the round solder pad. Be sure it is seated all the way so
the shoulders on the pins are against the board. Solder and trim all 16
pins.