Decide if the CW Hotline should be built with a straight key or Iambic paddles and follow the corresponding
instructions. If it will be only used with external keys and paddles, both instructions may be disregarded.
Straight Key Parts
1 Straight Key PCB arm
1 PCB wrench for #4 nuts
3 #4-40 ⅜” screws
2 #4 washers
7 #4 nuts
1 knob & cap
1 #4-40 ⅝” screw
Straight Key Assembly
Insert 2 ⅜” screws into the 2 holes nearest the
center of the main PCB with the screw heads
on the LED side of the PCB. On the other side, insert a washer and nut onto each screw and hand
tighten.
Insert the last ⅜” screw into the hole
nearest the center of the PCB arm, and
lightly secure with a nut.
Insert the PCB arm onto the main PCB
on the ESP8266 side through the 2 first
screws, with the third screw through the
PCB hole marked GND. Secure to the
first 2 screws with 2 nuts.
Add the final nut to the third screw on
the LED side of the PCB. This screw
should be rigidly secured to the main
PCB, and the screw head should only
make contact with the plated ring
around the hole on the arm when the
arm is pressed. Using the PCB wrench,
adjust the 2 nuts on the screw so the
head of the screw is just below but
doesn’t contact the ring on the PCB
arm.
Insert the ⅝” screw to the last hole in
the PCB arm with the head on the
ESP8266 side. Remove the cap from
the knob, add the knob to the other side,
and secure with the last nut. Place the cap back on the knob.