3
West Mountain Radio
Operating Manual
Connections
AUDIO IN:
1/8” stereo jack that accepts audio from a low-
impedance external speaker jack or headphone output jack
typically found on Amateur transceivers. Use the supplied stereo
patch cable to connect to the radio if the radio has a stereo
output. If using two radios, use a right/left splitter adapter or
audio splitter cable to connect to two radios/audio sources.
PTT:
1/8” mono jack that can be used to indicate when the radio
is in transmit mode (active low). The CLRstereo uses the audio
level drop to detect transmit. In a noisy environment where the
audio level never drops completely out this can be used as a
definitive indicator. If the CLRstereo does not properly detect
transmit mode, when the transmit is complete, the CLRstereo
may take an additional second to learn the receive noise before
suppressing it.
AUDIO OUT:
1/8” stereo jack that contains both audio signals.
It can drive a stereo headphone, amplified stereo speaker set or
two small speakers.
Coaxial Power Jack:
This is one of two possible sources of
power for the CLRstereo. The CLRstereo comes with a 6ft. power
cable. One end is a 2.1 mm power plug (center positive) and
the other is a pair of Powerpole
®
connectors. RED is for PLUS
13.8 VDC and BLACK is for Ground. If using other connectors,
just remove the Powerpole
®
and connect the white striped wire
to PLUS 13.8 VDCand the other wire to ground. The CLRstereo
is protected from a reverse polarity power connection. A small
500mA, 12-volt, wall mount power supply (wall wart)may be used
to power the CLRstereo. The plug required is 5.5mm OD with a
2.1 mm pin, and the pin is positive. West Mountain Radio carries
