Uniden PRO505XL

| mayo 8, 2019

40 Channel Compact Mobile CB Radio

Uniden PRO505XL CB Radio

  • Full 40 Channel Operation
    Backlit LCD Display
    Public Address
    Channel Up/Down Buttons
    S/RF Meter


Connect the microphone
Align the microphone connector with the jack on the front of the radio. Push the connector in firmly and secure it with the locking screw.

Connect the power
You can connect the radio to any standard 12 volt DC power source, with either a positive or negative ground. If you don’t know whether your power supply uses a positive or negative ground, consult the manual for your power supply or contact the manufacturer.

WARNING! DO NOT connect this equipment to a power supply if you are not absolutely certain of the grounding type!

1) Make sure your power supply is turned off.

2) For power supplies with a NEGATIVE ground, connect the RED lead on the radio to the power supply’s POSITIVE (+) pole, and connect the BLACK lead to the power supply’s NEGATIVE (–) pole or to a neutral ground such as the chassis. Turn on your power supply.

3) Turn the radio’s Volume knob clockwise to power on the radio.

Installing the mounting bracket
When choosing the location for the radio’s mounting bracket, keep the following things in mind:

  • Pick a location that does not block your view, interfere with your vehicle’s controls, or hinder your driving.
  • Make sure the radio and microphone are not in front of an airbag.
  • Pick a solid surface that can support the bracket and radio weight.
  • Make sure there’s enough room. (You may want to put the radio in the bracket when you’re choosing where to install the bracket.)

Once you choose the location, use the included, self-tapping screws to attach the mounting bracket and the microphone bracket to your vehicle (you don’t have to drill holes). Slide the radio into the bracket and use the included knobs to hold it at the preferred angle.

Connecting an external antenna
WARNING! The antenna used for this radio must be installed at least 8 inches (20 cm) away from all persons. The antenna must not be collocated or used with any other antenna or transmitter.

CAUTION: Never operate your radio with no antenna or with a damaged antenna cable. This can damage the radio.

You will need to purchase an antenna to operate the radio. There are two basic types of mobile CB antennas–full-length whips and loaded whips–with a wide variety of mounts to suit different vehicle locations.

  • Choose an antenna that matches the specifications of this radio.
  • Follow the manufacturer’s installation instructions carefully.
  • Tune your antenna using a Standing-Wave Ratio (SWR) meter: set the radio to channel 20, and adjust the antenna until the SWR is as close as 1:1 as possible.

CAUTION: Make sure the SWR is less than 2:1 before using the radio. An SWR higher than 2:1 can damage the transmitter.


Every six to twelve months, check to make sure that…

  • The Voltage Standing Wave Ratio (VSWR) is less than 2:1.
  • All electrical connections are secure and free of corrosion.
  • The antenna cable shows no wear or damage.
  • All mounting screws are securely fastened.


If your radio is not performing to your expectations, please try these simple steps. If these steps don’t solve your problem

Problem: Things to try:
Radio won’t turn on (no power)

1.    Check the radio’s power cord and all connections.

2.    Check the fuse in the radio’s power cord.

3.    Check your vehicle’s electrical system.

Poor reception

1.    Adjust the squelch level.

2.    Check the antenna, cable and connectors.

3.    Check operation mode of the radio.



1. Adjust the squelch level.



1.    Check the antenna, cable and connectors.

2.    Check the antenna grounding.

3.    Check for corrosion on the connectors.

PA won’t broadcast

1.    Check the CB/PA toggle is set to PA.

2.    Check the mike’s PTT button is pressed in when you talk.


Channels 40 AM
Frequency Range 26.965 to 27.405 MHz
Frequency Control Phase Locked Loop (PLL) synthesizer






-30°C to +50°C
Microphone Plug in type, electret
Input Voltage 13.8 V DC nom. (+ or – ground)
Current Drain TX full mod., 1.4A
RX with max. audio output, 0.8A
Size 4-7/8” W x 7-1/2” D x 1-3/4” H
Weight 1 lb. 3 oz.
Antenna Connector UHF, SO-239
LCD Meter Indicates relative RF output and received signal strength
Power Output 4 Watts
Modulation Class B amplitude modulation
Freq. Response 300-3000Hz
Output Impedance 50 ohms, unbalanced



Max. Sensitivity -107dBm
Image Rejection (910 KHz) 65 dB Nominal
I.F. Frequency Double Conversion Superheterodyne 1st 10.695 MHz 2nd 455 kHz
Squelch Sensitivity Threshold: -110dBm Nominal Tight: -47dBm Nominal
Audio Output Power 3 watts max. into 8 ohms
Freq. Response 200 to 3000 Hz
Distortion less than 10% at 1.5 watts, 1000Hz
Internal Speaker 8 ohms, 2 watts round

FCC Compliance

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void your authority to operate the equipment.

Owner’s Manuals

  • PRO505XL – pdf English
  • PRO505XL – pdf Spanish

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