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General| Type | Automatic Antenna Tuner |
|---|---|
| Frequency Range | 1.8 - 30 MHz |
| Input Impedance | 50 Ohms |
| Output Impedance | 50 Ohms |
| SWR Meter | Yes |
| Power Meter | Yes |
| Power Handling | 300 W PEP, 150 W continuous |
| Power Rating | 300 Watts SSB/CW |
| Power Supply | 12 VDC |
Provides an overview of the MFJ-939 Plug&Play Intellituner's capabilities and purpose.
Lists the specific Icom, Kenwood, and Yaesu radio models compatible with the tuner.
Details the tuner's automatic tuning, memory, and matching capabilities.
Presents the tuner's performance parameters, frequency coverage, and power ratings.
Guides users through the first steps of connecting and operating the tuner safely.
Describes the function of the SWR LED, TUNE LED, and TUNE button.
Explains the multi-functionality of the ALT and POWER buttons.
Details how to switch between automatic and semi-automatic tuning modes.
Describes the power input jack and RF connectors (Transmitter, Ground, Antenna).
Outlines the physical installation, antenna, and transmitter connections.
Explains how to connect interface cables and reconfigure for different radio models.
Details how to operate the tuner with compatible Icom radios using the MFJ-5114I cable.
Details how to operate the tuner with compatible Kenwood radios using the MFJ-5114K cable.
Explains operation with specific Yaesu FT series radios using the MFJ-5114Y cable.
Details operation with the Yaesu FT-950 radio using the MFJ-5114Y cable.
Details operation with Yaesu FT-2000 series radios using the MFJ-5114Y4 cable.
Covers operation with high-end Yaesu models using the MFJ-5114Y3 cable.
Explains how to configure and operate the tuner with Alinco radios using the MFJ-5114A cable.
Explains antenna memory resolution, banks, and the Intellituner algorithm.
Discusses inductance, capacitance limits, and tuning parameters.
Explains Morse code alerts, beeps, and transceiver foldback protection.
Provides guidelines for proper grounding and RF safety.
Discusses antenna placement and common impedance matching issues.
Details special functions activated at power-on and how to reset the tuner.
Describes deleting memories, total reset, and performing a self-test.
Details failure messages and the power-down circuit test.
Explains relay testing and frequency counter calibration.
Details the procedure for calibrating the SWR bridge.
Details the function of various jumpers for radio model selection and interface setup.
Provides steps for resolving common operational issues.
Lists contact information for support and optional accessories.
Outlines the warranty coverage, conditions, and service procedures.
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