kenwood tm 261a manual pdf

The Kenwood TM-261A is a 2-meter FM transceiver designed for amateur radio operations, featuring 45W output power, 200 memory channels, built-in CTCSS/DCS, wide frequency coverage, and robust construction for mobile use. Below are key sections covering specifications, installation, operation, programming, and maintenance.

1. Features Overview 2. Installation Guide 3. Basic Operation 4. Technical Specifications 5. Controls and Functions 6. Memory Programming 7. CTCSS/DCS Operation 8. Maintenance & Care 9. Regulatory Compliance 10. Troubleshooting

Features Overview

Key components: Main unit, microphone, mounting bracket, DC power cable, and operation manual.

Feature	Description
Frequency Range	136-174 MHz (RX/TX)
Output Power	45W (High), 10W (Low)
Memory Channels	200 channels (including 10 scan edges)
CTCSS/DCS	Built-in encoder/decoder
Power Supply	13.8V DC ±15%
Antenna Connector	SO-239
Dimensions	140(W) × 45(H) × 180(D) mm
Weight	1.2 kg
Microphone	Included with UP/DOWN controls
Display	LCD with backlight

Installation Guide

Proper installation ensures optimal performance and safety.

Mounting: Secure using provided bracket in vehicle or stationary location.
Power Connection: Connect red wire to positive (+), black wire to negative (-) of 13.8V DC source.
Antenna: Connect compatible 2-meter antenna to SO-239 connector.
Microphone: Plug into MIC jack on front panel.

WARNING! Ensure proper fuse rating (15A recommended). Avoid power source reverse polarity.

Basic Operation

Power on unit; adjust volume and squelch as needed.

Frequency Selection: Use main dial or UP/DOWN buttons on microphone.
Power Level: Press [LOW] to toggle between 45W and 10W output.
Transmit: Press and hold PTT on microphone; speak clearly.
Receive: Adjust SQUELCH control to eliminate background noise.

CAUTION! Operate only with proper amateur radio license for your region.

Technical Specifications

Frequency Coverage: 136-174 MHz (all modes)
Mode: FM
Power Output: 45W (High), 10W (Low) selectable
Memory Channels: 200 channels
Voltage: 13.8V DC ±15% negative ground
Current Drain: 12A max (TX at 45W), 1A (RX), 0.5A (standby)
Impedance: 50 ohms
Dimensions: 140 × 45 × 180 mm (W×H×D)
Weight: 1.2 kg
Temperature Range: -20°C to +60°C

Controls and Functions

Front Panel: POWER/VOLUME knob, SQL control, Function [F] key, Channel Selector, [LOW] power switch.

Microphone: PTT, UP/DOWN buttons, optional [F] function access.

Display: Shows frequency, memory channel, CTCSS/DCS status, power level. Function Menu: Access by pressing [F] then corresponding button for settings like repeater offset, tone encode/decode, scan functions.

Memory Programming

Store frequently used frequencies and settings.

Select memory channel: Press [MR] then dial to desired memory number.
Store frequency: Tune to desired frequency, press [F] then [MR] for 2 seconds.
Program offset/tone: Use [F] menu to set repeater shift (±), CTCSS/DCS tones.
Recall: Press [MR] and select channel number.

Tip: Use memory channels for quick access to local repeaters.

CTCSS/DCS Operation

Encode/decode sub-audible tones for repeater access and private calling.

Access tone menu: Press [F] then [TONE] button.
Select encode/decode/both: Use dial to choose mode.
Choose tone frequency: Select from built-in CTCSS (67.0-250.3 Hz) or DCS codes.
Save: Settings are stored per memory channel.

Note: CTCSS/DCS settings must match repeater requirements for access.

Maintenance & Care

Keep unit clean and dry. Use soft cloth for exterior; avoid chemicals.

CAUTION! Disconnect power before cleaning. Do not immerse in liquids.

Regulatory Compliance

FCC Part 97: Certified for 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, contact authorized Kenwood dealer or visit www.kenwood.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection/fuse	Check DC connections; verify fuse integrity; ensure proper voltage.
No transmission	PTT/microphone	Check microphone connection; verify PTT function; check antenna.
Poor reception	Antenna/squelch	Verify antenna connection; adjust squelch control; check location.
Memory lost	Power interruption	Re-program memory channels; ensure continuous power during operation.
No audio	Volume/speaker	Adjust volume control; check external speaker connection if used.

Reset: Turn off unit, press [F] + Power on to reset to factory defaults (erases memories).

Service: Contact authorized Kenwood service center for repairs.