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Broadcast Electronics AMX 5 – 5 kW AM Transmitter

Broadcast Electronics AMX 5 is a compact 5 kW AM transmitter with silicon-carbide amplification, standard MDCL+ carrier control, front-access modules and HTML5 remote monitoring.

Broadcast Electronics AMX 5 – 5 kW AM Transmitter combines silicon-carbide RF amplification and modulation in a compact 5U chassis. Its published output range of 100 W–5.6 kW supports different operating levels, while 85% efficiency at 5 kW carrier output into a 50-ohm load helps manage energy consumption. Standard MDCL+ adds programme-dependent carrier reduction.

Efficient Amplification and Protection

Silicon-carbide MOSFETs serve both the RF amplifier and pulse-width modulator. Integrated MDCL+ provides continuously adjustable carrier reduction up to 6 dB, with actual savings dependent on programme content and settings. Safe Mode protection places the amplifier into a protected state during severe electrical events. Full carrier power is supported into a nominal 1.5:1 VSWR, with automatic power reduction at higher mismatch.

Modular Servicing and Frequency Configuration

Broadcast Electronics AMX 5 provides front-access RF modules, power supplies and a removable harmonic-filter assembly. Rear-removable exciter and control modules simplify maintenance without extensive rack disassembly. The transmitter is supplied on one ordered frequency within 525–1705 kHz. Field frequency changes require the appropriate harmonic filter and calibration rather than a software-only tuning adjustment.

Monitoring, Audio and Digital Readiness

The Broadcast Electronics AMX 5 OLED front-panel display and HTML5 browser interface provide metering, configuration and diagnostics. SNMPv3, parallel remote connections and a 500-event log support station supervision. One balanced analogue input and two AES3 inputs accommodate different audio chains. HD Radio and DRM operation require the appropriate external signal generator. Optional Orban Inside processing adds integrated AM audio processing and HLS streaming input.

Basic Specifications

  • Factory model: AMX 5; rated power class: 5 kW.
  • Output range: 100 W–5.6 kW.
  • Frequency coverage: 525–1705 kHz; supplied on one ordered frequency.
  • Channel spacing: 9 kHz or 10 kHz.
  • RF output: 7/16 DIN; 50 ohms.
  • Efficiency: 85% at 5 kW carrier into 50 ohms.
  • Modulation: digital pulse-width modulation.
  • Positive modulation capability: greater than 150% at rated nominal output.
  • AC input: 185–264 V, single or three phase, 47–63 Hz.
  • Operating temperature: 0–50°C.
  • Rack format: 5U.
  • Unpacked dimensions: 19 × 24 × 8.75 inches, W × D × H.
  • Unpacked weight: 30.8 kg.