Kenwood TH K20 Manual

The Kenwood TH K20 is a 2-meter amateur radio transceiver featuring 5W output power, 200 memory channels, wide frequency coverage (140-174MHz), CTCSS/DCS encode/decode, built-in VOX, large LCD display, priority channel monitoring, and compact design. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Main unit with LCD display, microphone connector, antenna port, DC power input, external speaker jack, and programming port.

Feature	Description
Frequency Range	140-174MHz (2-meter band)
Output Power	5W (High), 1W (Low)
Memory Channels	200 channels with alphanumeric tags
CTCSS/DCS	Encode and decode functions
VOX	Voice-operated transmit
Display	Large LCD with backlight
Power Input	13.8V DC nominal
Antenna Connector	SO-239
Microphone	Included with PTT and controls
Size/Weight	Compact design, lightweight

Installation

Unpack and inspect contents. Choose suitable mounting location.

1. Connect antenna: Use appropriate coaxial cable with SO-239 connector.
2. Connect power: Use 13.8V DC power supply, observing correct polarity.
3. Connect microphone: Plug into front panel microphone jack.
4. Mount securely: Use mounting bracket for mobile installation.

WARNING! Ensure proper antenna installation and secure mounting. Observe correct power polarity to prevent damage.

First-Time Setup

Power on radio; configure basic settings.

1. Set frequency: Use main dial to select operating frequency.
2. Configure squelch: Adjust squelch control for optimal reception.
3. Set power level: Select High (5W) or Low (1W) power.
4. Program memory channels: Store frequently used frequencies.
5. Configure CTCSS/DCS: Set tone squelch if required by repeater.

CAUTION! Ensure proper licensing for amateur radio operation. Verify frequency authorization before transmitting.

Specifications

• Frequency Range: 140-174MHz
• Output Power: 5W (High), 1W (Low)
• Memory Channels: 200 channels
• Modulation: 16KΦF3E (FM)
• Power Supply: 13.8V DC ±15%
• Current Drain: Approx. 1.5A (TX max), 0.3A (RX)
• Antenna Impedance: 50 ohms
• Operating Temp: -10°C to +60°C
• Dimensions: Compact mobile form factor
• Weight: Approximately 0.5kg

Controls and Settings

Front Panel: Power/Volume knob, Channel selector, Function keys, Microphone jack.

Microphone: PTT, Up/Down buttons, Function key.

Basic Controls: Power/Volume, Squelch, Channel selector, Function key. Menu Settings: CTCSS/DCS setup, VOX sensitivity, Scan functions, Display settings, Time-out timer, Lock functions.

Connecting Accessories

External Speaker: Use external speaker jack for improved audio. Programming Cable: Connect to PC for programming. Power Supply: 13.8V DC with proper current rating.

1. Turn off radio before connecting accessories.
2. Use appropriate cables and connectors.
3. Verify accessory compatibility.

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

Memory Operations

Store and recall up to 200 channels with alphanumeric tags.

1. Store frequency: Tune to desired frequency, press F then MR to store.
2. Recall memory: Press MR and rotate channel selector.
3. Edit memory: Use menu to add alphanumeric tags.
4. Memory scan: Scan stored memory channels.
5. Delete memory: Access memory delete function in menu.

WARNING! Backup important memory channels regularly. Memory may be lost if power is disconnected.

Advanced Functions

CTCSS/DCS: Encode and decode tone squelch. VOX: Voice-operated transmit. Priority Channel: Monitor priority channel while scanning. Time-out Timer: Automatic transmit time limit. Lock Functions: Prevent accidental setting changes.

Care & Maintenance

Keep radio clean and dry. Use soft cloth for cleaning. Avoid extreme temperatures and moisture.

CAUTION! Do not use chemical cleaners. Keep away from water and excessive dust.

Regulatory Information

FCC Part 97: Certified for amateur radio service. This device complies with Part 15 of FCC Rules. Operation subject to amateur radio licensing. Copyright © Kenwood Corporation. For support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection	Check power cable and fuse; verify correct voltage.
No transmission	PTT/Microphone	Check microphone connection; verify PTT function.
Poor reception	Antenna/Squelch	Check antenna connection; adjust squelch setting.
Memory loss	Backup battery	Memory backup battery may need replacement.
No audio	Volume/Speaker	Check volume setting; verify speaker connection.

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

Service: Contact authorized Kenwood service center for repairs.