Uniden America UT421 User Manual
PRO505XL
U01UT386ZZA(1)
Professional Mobile CB Radio
© 2019 Uniden America
Corp. Irving, Texas
Printed in Vietnam
INTRODUCTION
Welcome to the world of Citizens Band radio communications. Your
Uniden radio is an advanced mobile radio designed for use in the
Citizens Band (CB) Radio Service. It will operate on any of the 40 AM
frequencies authorized by the Federal Communications Commission
(FCC). Your Radio features a superheterodyne circuit with PHASE
LOCKED LOOP techniques to assure precise frequency control.
Safety Notice
The antenna used for this radio must be properly installed and
maintained and must provide a separation distance of at least 16.92
inches (43 cm) from all persons and must not be collocated or operated
in conjunction with any other antenna or transmitter. Never transmit if
any person is closer than the specied distance to the antenna.
Note that Uniden does not specify or supply any antenna with
this transceiver. While a 0 dBi gain antenna is normal for a typical
installation, the above limit applies to any antenna with up to 3 dBi gain.
CB license requirement
U.S. users no longer need to apply for a license to use a CB radio.
However, CB radio is still considered a “license by rule” service. This
means that, while the FCC permits CB station operation without station
identication, station operators are still required to comply with the
Communications Act and with the rules of CB Radio Service. (For more
information on U.S. radio rules, visit the FCC website at www.fcc.gov.)
Uniden contact information
You can get answers 24/7 at our website: www.uniden.com.
INCLUDED IN YOUR PACKAGE
If any of these items are missing or damaged, immediately contact your
place of purchase or www.uniden.com.
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PRO505XL Mobile radio
1
2
Mounting bracket, knobs, and mounting hardware
Microphone and hook
► Other printed materials
NOTE: You must use a CB antenna (sold separately) with this radio.
PARTS OF THE RADIO
Front
3
4
765
No. Name Details
1 CB/PA
Switches between CB Radio and PA systems
Switch
2 Volume/
Power
Adjusts the volume.
Turns radio on and off.
3 4-Pin Mic Plugs in microphone
4 CH9 Sets the radio to CH9 (Emergency).
5, 6 Channel
Selectors
7 Squelch
knob
Press or to select which channel the radio
will transmit or receive on.
Adjusts the level at which the radio squelches or
suppresses weak radio signals
3
NOTE: FCC rules reserve Channel 9 for motorist assistance and
Push-to-Talk
other emergency communications. Channel 9 should only be used
in situations where there is immediate danger to the safety of
individuals or the protection of property.
Back
10
9
8
11
No. Name Details
8 Antenna
Connector
9 PA Speaker
Connects to a male PL-259 external antenna
cable (antenna sold separately).
See Connecting external speakers, page 6.
Jack
10 External
See Connecting external speakers, page 6.
Speaker Jack
11 12 Volt DC
Connects to DC power supply, page 4.
Power Cord
Microphone
Press and hold the PTT button to transmit on
the selected channel. Release the button to listen
for a response.
NOTE: For the best sound quality, hold the
microphone about 2 inches away from your
mouth and speak in a normal voice.
button
NOTE: Make sure you have read and understood part 95 of the FCC
rules and regulations before using the transmitter.
INSTALLATION
Connect the microphone
Align the microphone connector with the jack on the front of the radio.
Push the connector in rmly and secure it with the locking screw.
Connect the power
You can connect the radio to any standard 12 volt DC power source,
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