Connections
External power supply
Any 10-14V DC voltage or battery can be connected through the external power jack. The power jack has a polarity
protection circuit to prevent damage to the machine due to reverse power connection.
Headset
Connect stereo headphones to the headphone jack (PHONE), impedance 8-32 ohms.
Antenna
Any resonant antenna can be directly connected to the antenna input (ANT) with a BNC connector. For
non-resonant antennas, an antenna tuner should be connected between the antenna input and the antenna.
Key
This circuit has the function of automatically identifying Paddle and straight keys. Just connect the straight key to
the mono plug or connect the middle ring and the bottom of the stereo plug to the ground as shown in the figure
below. When the power is turned on, the circuit will be different according to the inserted key. For automatic
detection, when you hear a click (Morse code letter A), it is a paddle, and when you hear a click (Morse code letter
M), it is a straight key. (
Be sure to insert the straight key into the socket first and then turn on the power to get into
the straight key function
).
3.5mm Stereo Plug Start-up Screen
Operating:
