Elecraft KNB2 Manual - Manual (Page 6)

6
Install the 8-pin female connector on the RF board at J12 as shown by its outline near W5. Do not
solder yet. The side view of J12, below, shows how it should appear once properly seated.
J12
Solder just one pin near the middle of J12, on the bottom of the RF board. Then, if the connector is not
sitting completely flat against the RF board (or is not vertical), reheat this pin and carefully press the
connector down. You may hear it snap into place. Then solder the remaining pins of J12.
Install the 3/8" (9.5 mm) standoff on the top of the RF board as shown below, using a total of three
split lock washers and a 1/4" (6 mm) machine screw. The mounting hole for the standoff is just to the right
of I.F. amplifier transistor Q22. Use two split lock washers between the standoff and the top of the RF
board in order to position the module at the correct height.
If Q22 on the RF board is not seated flat against the board, re-heat all three pins alternately and push it
down until it is flush. Make sure that Q22's heat sink is pushed down as far as it will go and is not loose.
Plug the noise blanker module into J12 (above Q22), being careful to line up all pins of P1 with J12.
Secure the module to the standoff provided using a 1/4" (6 mm) screw and one split lock washer.
Re-install the bottom cover (6 screws).