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NA 505 – 500W

87.5 – 108 MHz Range


  •  Extremely high efficiency MOSFET technology amplifier.
  • High gain PA, typically capable of more than 500 W output power with less than 10 W drive input power.
  • Automatic gain control providing fixed output power even in case of fluctuating drive power.
  • High reliability, easy handling and consistent performance standard achieved among the various units due to total absence of tuning requirements.
  • Compact size.
  • Easily replaceable standard components.
  • Advanced recycling overload and protection system.
  • Proportional Auto-Foldback of output power in the event of excessive VSWR.
  • Full remote control and telemetry capability, with all main parameters on rear terminal connector.


  • Frequency Range: 87.5-108 MHz 
  • RF input power: 6- 10 W max. 
  • RF Output Power: 500 W ± 0.5dB 
  • RF Output Connector/Impedance: “N” Connector/ 50 ohm 
  • RF Input Connector/Impedance: “N” Connector/50 ohm 
  • RF monitor connector: BNC 
  • RF monitor attenuation: 54 dB 
  • Harmonic and spurious emission: < -70 dBc ALC 
  • Output power stability: ± 3% AC Input Power: 110-125/220-240 Volts Single Phase 
  • Power Consumption: 1000 watts from AC 
  • Overall Dimensions: 19” (483 mm) wide x 7” (117 mm) high x 16” (420 mm ) depth. 
  • Weight: 38 Lbs (17 Kg) 
  • Recommended Ambient Temperature : 0° to 30° C (32° to 85° F) 
  • Maximum Humidity: 90%, non-condensing

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