Kenwood V71 Manual

The Kenwood V71 is a dual-band transceiver featuring 144/430MHz operation, cross-band repeat function, 200 memory channels, wide frequency coverage, CTCSS/DCS encode/decode, weather alert function, and high power output. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Dual-band transceiver, microphone, DC power cable, mounting bracket, remote control head cable.

Feature	Description
Frequency Range	144-148MHz, 430-450MHz
Power Output	50W VHF, 35W UHF
Memory Channels	200 memory channels
Cross-band Repeat	Full duplex cross-band repeating
CTCSS/DCS	50 CTCSS tones, 104 DCS codes
Weather Alert	NOAA weather channels with alert
Power Supply	13.8V DC negative ground
Display	Dual LCD display with backlight
Antenna Connectors	Two SO-239 connectors
Data Port	For packet and GPS operation

Installation

Unpack and inspect contents. Choose suitable mounting location.

1. Connect power: Red wire to positive (+), black wire to negative (-) of 13.8V DC source.
2. Install antennas: Connect VHF and UHF antennas to respective SO-239 connectors.
3. Mount unit: Use provided bracket for secure mounting in vehicle.
4. Connect microphone: Plug into front panel MIC connector.

WARNING! Ensure proper polarity when connecting power. Reverse polarity may damage unit.

First-Time Setup

Power on unit; initialize settings.

1. Set operating frequency: Use VFO knob or direct frequency entry.
2. Configure squelch: Adjust SQL control for optimal reception.
3. Set power level: Select high/low power as needed.
4. Program memory channels: Store frequently used frequencies.
5. Configure cross-band repeat: Enable if required for operation.

CAUTION! Ensure proper antenna installation before transmitting.

Specifications

• Frequency Coverage: 144-148MHz, 430-450MHz
• Power Output: 50W VHF, 35W UHF (high), 5W (low)
• Memory Channels: 200 channels with alphanumeric tags
• Modulation: 16KΦF3E (FM)
• Power Supply: 13.8V DC ±15% negative ground
• Current Drain: 12A max (transmit), 1.3A (receive)
• Operating Temp: -20°C to +60°C
• Dimensions: 140W × 40H × 180D mm
• Weight: 1.2 kg

Controls and Settings

Front Panel: Power switch, Volume control, SQL control, VFO knob, Function keys, Microphone connector.

Microphone: PTT, Up/Down keys, Function keys, numeric keypad.

Basic Settings: Frequency selection, power level, squelch level, tone encode/decode. Advanced Settings: Cross-band repeat, memory functions, scan settings, display contrast, time-out timer, APO function.

Connecting Devices

External Speakers: Use external speaker jack for additional audio output. Data: Use data port for packet operation or GPS interface. Remote Head: Connect remote head cable for separate mounting.

1. Turn off unit before connecting external devices.
2. Use appropriate cables and connectors.
3. Secure all connections to prevent disconnection during operation.

Tip: Use high-quality coaxial cables for antenna connections to minimize signal loss.

Operating Modes

Supports simplex, semi-duplex, and cross-band repeat operations.

1. VFO Mode: Direct frequency entry and tuning.
2. Memory Mode: Recall stored frequencies and settings.
3. Call Channel: Quick access to designated call frequency.
4. Weather Mode: Monitor NOAA weather channels.
5. Scan Modes: Programmable scan with memory skip functions.
6. Dual Watch: Monitor two frequencies simultaneously.
7. Cross-band Repeat: Retransmit received signals on opposite band.

WARNING! Ensure compliance with local regulations when using cross-band repeat function.

Memory Functions

Store frequencies, tones, and operating parameters in 200 memory channels.

1. Memory Store: Save current VFO settings to memory channel.
2. Memory Recall: Select stored memory channels.
3. Memory Clear: Delete unwanted memory entries.
4. Memory Groups: Organize memories into groups for easy access.
5. Memory Name: Assign alphanumeric names to memory channels.

Care & Maintenance

Keep unit clean and dry. Use soft cloth for cleaning; avoid solvents. Periodically check antenna connections and power cables.

CAUTION! Do not operate with damaged antennas or power cables. Keep unit away from excessive heat and moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. FCC Part 97: Amateur Radio Service rules apply. This device must accept any interference received. For technical support, contact Kenwood authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection	Check power cable connections and fuse; verify 13.8V DC supply.
No transmission	PTT/Mic connection	Check microphone connection; verify PTT operation; check antenna.
Poor reception	Antenna/Squelch	Verify antenna connection; adjust squelch control; check antenna SWR.
Memory loss	Backup battery	Memory backup battery may need replacement after several years.
Overheating	Ventilation/Power	Ensure adequate ventilation; reduce power output if necessary.

Reset: Menu > System > Reset to factory defaults if required.

Service: Contact authorized Kenwood service center for repairs.