Kenwood TS 790 Manual

The Kenwood TS 790 is a high-performance amateur radio transceiver featuring multi-band operation, advanced DSP technology, built-in antenna tuner, multiple operating modes, and comprehensive connectivity options. This manual covers essential information for proper installation, operation, and maintenance of your Kenwood TS 790 transceiver.

Features at a Glance

Key components: Multi-band transceiver, DSP unit, built-in antenna tuner, microphone connector, data port, speaker output, power connector.

Feature	Description
Frequency Coverage	HF, VHF, UHF amateur bands
Operating Modes	SSB, CW, AM, FM, Digital
Power Output	Adjustable up to 100W (HF), 50W (VHF/UHF)
DSP Technology	Digital Signal Processing for enhanced reception
Built-in Antenna Tuner	Automatic and manual tuning modes
Memory Channels	Multiple memory banks with scanning
Data Port	For computer interface and digital modes
Power Requirements	13.8V DC nominal
Display	Multi-function LCD with backlight
Microphone Connector	8-pin modular connector

Installation

Unpack and inspect all components. Choose suitable operating location.

1. Connect power supply: Use proper gauge wires for 13.8V DC connection.
2. Install antenna: Connect coaxial cable to ANT connector.
3. Connect microphone: Plug into 8-pin microphone jack.
4. Connect accessories: Use data port for computer interface.
5. Connect speaker: External speaker optional for improved audio.

WARNING! Ensure proper ventilation; do not block cooling vents. Use appropriate fusing for power connections.

First-Time Setup

Power on transceiver; configure initial settings.

1. Set operating frequency: Use VFO knob or direct frequency entry.
2. Configure operating mode: Select SSB, CW, FM, or AM as needed.
3. Adjust power output: Set appropriate power level for band and mode.
4. Program memory channels: Store frequently used frequencies and settings.
5. Set up antenna tuner: Perform initial antenna matching.

CAUTION! Verify antenna system before transmitting. Start with low power for initial testing.

Specifications

• Frequency Range: Multiple amateur bands including 1.8-54 MHz, 144-148 MHz, 430-450 MHz
• Modes: LSB, USB, CW, AM, FM, Digital
• Power Output: 5-100W adjustable (HF), 5-50W (VHF/UHF)
• Sensitivity: Better than 0.15μV for 10dB S+N/N
• Selectivity: Multiple filter options available
• Antenna Impedance: 50 ohms unbalanced
• Power Requirement: 13.8V DC ±15%, 20A max
• Dimensions: Standard rack-mount size
• Weight: Approximately 8.5 kg

Controls and Settings

Front Panel: POWER, VOLUME, SQUELCH, VFO/MR, MODE, FILTER, AGC, NB, ANL, ATU.

Menu System: Access via MENU button for advanced settings including:

Frequency Control: VFO A/B, step size, RIT/XIT. Audio: AF gain, monitor, speech processor. DSP: Filter settings, noise reduction, notch filter. Memory: Channel storage, scanning, bank organization. ATU: Auto/manual tuning, memory, bypass.

Connecting Accessories

Microphone: 8-pin connector. Data: RS-232 or USB interface. Antenna: SO-239 connector. External speaker: 8-ohm output.

1. Ensure transceiver is powered off before connecting accessories.
2. Use proper cables and connectors for each accessory type.
3. Verify accessory compatibility before connection.
4. Configure interface settings in menu system.

Tip: Use shielded cables for data connections to reduce interference.

Operating Modes

Supports multiple operating modes for various communication needs.

1. SSB Operation: Select LSB or USB depending on frequency band.
2. CW Operation: Adjust keyer speed and sideband selection.
3. FM Operation: Set deviation and CTCSS tones as needed.
4. Digital Modes: Configure data port for PSK31, RTTY, etc.
5. Memory Operation: Recall stored frequencies and settings.
6. Scanning: Program and execute frequency scans.
7. Split Operation: Set different transmit/receive frequencies.
8. DSP Functions: Utilize noise reduction and filtering.

WARNING! Ensure proper mode selection for intended band and emission type.

Memory Functions

Multiple memory channels with comprehensive storage options.

Memory Storage: Frequency, mode, filter settings, offset, tone. Memory Banks: Organize channels by band or purpose. Memory Scan: Scan stored channels with programmable limits. Memory Lock: Protect important channels from accidental changes.

Maintenance

Regular maintenance ensures optimal performance and longevity.

1. Cleaning: Use dry cloth for exterior; compressed air for connectors.
2. Ventilation: Keep cooling vents clear of obstructions.
3. Connectors: Check for corrosion and secure connections.
4. Software: Update firmware when available.

CAUTION! Disconnect power before cleaning. Do not use liquid cleaners.

Regulatory Information

FCC Part 97: Complies with amateur radio service rules. CE compliant for European markets. Manufacturer: Kenwood Corporation. For technical support and service, contact authorized Kenwood service centers or visit www.kenwood.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection/fuse	Check power cable and connections; verify fuse condition.
No transmit	Settings/antenna	Check PTT operation; verify antenna system; check power settings.
Poor reception	Antenna/connections	Verify antenna connection; check coaxial cables; adjust squelch.
Overheating	Ventilation/power	Ensure adequate ventilation; reduce power output if necessary.
Memory loss	Backup battery	Replace internal backup battery; reprogram memory channels.

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

Service: Contact authorized Kenwood service center for technical support.