Kenwood TH D7 Manual

The Kenwood TH D7 is a dual-band amateur radio transceiver featuring 2m/70cm operation, built-in TNC for packet radio, APRS capability, wide receiver coverage, cross-band repeat function, multiple scanning modes, CTCSS/DCS encode/decode, and robust construction. Powered by 13.8V DC, this radio offers comprehensive features for amateur radio enthusiasts. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Dual-band transceiver, built-in TNC, microphone connector, antenna ports, DC power input, speaker output, data port.

Feature	Description
Frequency Range	144-148 MHz (2m), 430-450 MHz (70cm)
Output Power	5W (high), 0.5W (low) selectable
TNC	Built-in packet radio terminal node controller
APRS	Automatic Packet Reporting System capability
Cross-band Repeat	Full duplex cross-band repeating function
Scanning Modes	Program, memory, band, and tone scan
CTCSS/DCS	Encode and decode capabilities
Memory Channels	200 memory channels with alphanumeric tags
Power Input	13.8V DC nominal
Antenna Connectors	Dual SO-239 connectors

Installation

Unpack and inspect contents. Choose suitable mounting location.

1. Connect antenna: Use appropriate coaxial cable to SO-239 connectors.
2. Connect power: Use supplied power cable to 13.8V DC source.
3. Connect microphone: Plug microphone into front panel connector.
4. Connect external speaker: Use speaker jack if external speaker required.

WARNING! Ensure proper antenna installation and grounding. Use appropriate fusing for power connection.

First-Time Setup

Power on radio; configure basic settings.

1. Set operating frequency: Use VFO knob or keypad to select frequency.
2. Configure squelch: Adjust squelch control for proper operation.
3. Program memory channels: Store frequently used frequencies.
4. Set CTCSS/DCS tones: Configure tone access as required.
5. Configure TNC settings: Set up packet radio parameters.

CAUTION! Verify frequency authorization and power settings comply with local regulations.

Specifications

• Frequency Coverage: 144-148 MHz, 430-450 MHz
• Output Power: 5W/0.5W selectable
• Modulation: FM (16F3)
• Receiver System: Double conversion superheterodyne
• Sensitivity: Better than 0.16μV for 12dB SINAD
• Audio Output: 1W at 8 ohms
• Power Requirements: 13.8V DC ±15%
• Current Drain: 1.5A max (transmit), 0.5A typical (receive)
• Operating Temperature: -10°C to +60°C
• Dimensions: 140(W) × 40(H) × 180(D) mm

Controls and Settings

Front Panel: Power switch, volume control, squelch control, VFO knob, function keys, LCD display.

Microphone: PTT, up/down buttons, function keys.

Menu Settings: Frequency step, scan settings, tone settings, TNC configuration, APRS setup, memory management, display settings, power settings.

Connecting Devices

Antenna: SO-239 connectors. Power: DC input jack. Audio: External speaker jack. Data: TNC data port.

1. Turn off radio before connecting accessories.
2. Use appropriate cables and connectors.
3. Verify proper polarity for power connections.
4. Test all connections before operation.

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

Operating Modes

Supports simplex, repeater, cross-band, and packet operation.

1. Simplex Operation: Direct communication on same frequency.
2. Repeater Operation: Access repeaters with offset and tones.
3. Cross-band Repeat: Retransmit received signals on other band.
4. Packet Operation: Use built-in TNC for data communication.
5. APRS Operation: Transmit position and telemetry data.
6. Memory Operation: Quick access to stored frequencies.
7. Scan Operation: Monitor multiple frequencies or channels.

WARNING! Ensure proper licensing for operating frequencies and modes.

Advanced Features

TNC Operation: Configure for packet radio communication. APRS: Set up position reporting and messaging. Cross-band Repeat: Enable full duplex repeating between bands. Memory Management: Organize and manage memory channels.

Care & Maintenance

Keep radio clean and dry. Use soft cloth for cleaning; avoid solvents. Check connections regularly for corrosion or damage.

CAUTION! Do not expose to extreme temperatures or moisture. Service by qualified personnel only.

Regulatory Information

FCC Part 97: Amateur Radio Service. This device complies with Part 15 of FCC Rules. Operation subject to condition that device does not cause harmful interference. Copyright © Kenwood Corporation. For support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection/fuse	Check power cable; verify fuse; ensure proper voltage.
No transmission	PTT/microphone	Check microphone connection; verify PTT operation.
Poor reception	Antenna/connections	Verify antenna connection; check coaxial cable; adjust squelch.
TNC not working	Settings/cables	Verify TNC settings; check data cable connections.
Memory lost	Backup battery	Replace internal backup battery; reprogram memory.

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

Service: Contact authorized Kenwood service center for repairs.