User manual for the Uniden PRO401HH handheld CB radio: setup, battery and DC power, channel operation, 10-codes, troubleshooting and specs.
The PRO401HH is a handheld radio designed for use in the Citizens Band (CB) Radio Service. It operates on any of the 40 AM frequencies authorized by the Federal Communications Commission (FCC) and uses a superheterodyne circuit with Phase Locked Loop techniques for precise frequency control. Features listed for the radio include a condenser microphone, a ceramic filter, automatic gain control, automatic modulation control, an automatic noise limiter, a HI-LO transmit power switch, a BNC antenna connector and a jack for an external power source and battery charger.
The manual opens with a safety notice and FCC Part 15 compliance information, then lists Uniden contact details and the package contents. It describes the parts of the radio, antenna installation, DC and battery power setup including the low-power LED indication, basic operation such as turning the radio on and off, selecting a channel, changing the volume and transmitting, a table of common CB "10" codes, maintenance, troubleshooting steps, service and repair information, and full general, transmitter and receiver specifications.
| Channels | 40 AM |
|---|---|
| Frequency Range | 26.965 to 27.405 MHz |
| Frequency Control | Phase Locked Loop (PLL) synthesizer |
| Frequency Tolerance | ±0.005% |
| Operating Temperature | 14ºF to 131ºF (-10ºC to +55ºC) |
| Microphone | Electret Type |
| Input Voltage | 13.8 V DC nom, 10.9 VDC – 15.6 VDC |
| Current Drain | TX full mod. 1.7 A; RX with max. audio output 1.7 A |
| Size | 2.16 x 7.1 x 1.7 in (55 x 180 x 45 mm) |
| Weight | 0.56 lbs (255 g) |
| Transmitter Power Output | 4 Watts @ 13.8 VDC |
| Modulation | 85% - 95% |
| Output Impedance | 50 ohms, unbalanced |
| Receiver Sensitivity | <1 μV for 10 dB |
| Audio Output Power | 0.5 watts max. @ 8 ohms |
| Battery Power | 9 alkaline or 9 rechargeable Ni-Cd batteries |
It can run on either 9 non-rechargeable alkaline batteries or 9 rechargeable Ni-Cd batteries. A switch inside the battery compartment must be set to match the battery type you are using.
It operates on any of the 40 AM frequencies authorized by the Federal Communications Commission.
The red LED blinks when battery power is low. Replace or recharge the batteries, or connect the radio to a power source.
Tune to the channel you want, listen to make sure it is clear, then press and hold the PTT button and hold the microphone about 2 inches from your mouth. Release the PTT button to listen for a response.