CommRadio CTX-10 User Manual – Rev PRELIMINARY 05 APR 2018
21
Headphone
The headphone jack is a standard 2.5mm stereo jack providing volume controlled output
levels adjusted by rotation of Control Knob
[M]
. A stereo connected jack is provided so
you can hear the same audio on both L and R channels.
NOTE: Use this headphone jack as signal source for external powered speakers, powered
monitor speakers, or any other active circuitry.
SPKR
The SPKR jack is a standard 2.5mm stereo jack providing volume controlled output levels
adjusted by rotation of Control Knob
[M]
. Inserting a suitable plug into this jack
automatically disconnects the internal speaker, allowing all output
NOTE: For use of external passive (non-powered) speakers only. To achieve maximum
efficiency and minimal power drain, the internal speaker and this SPKR jack are powered
by a differential (non-ground referenced) amplifier. Damage can occur if this output is
connected to a ground-referenced device. DO NOT connect to any powered circuitry.
KEY
The KEY jack is a standard 2.5mm stereo jack and is the input port for either a straight key
or a three wire paddle. Using a straight key, the key turns the CW signal on and off. Using
a paddle, the paddle is the input to an electronic keyer which turns the CW signal on and
off. To use an external electronic keyer, configure the KEY input to straight key. Wiring
diagram for the stereo jack:
DIAGRAM
ACC
The ACC or accessory jack is a standard 6 pin (female) mini-DIN receptacle, sometimes
referred to as a PS/2 connection. Wiring diagram for the ACC receptacle:
DIAGRAM
