FlexRadio’s FPA series of high-power HF amplifiers redefines modern HF transmission by combining advanced protection, clean wideband linearity, and intelligent control in a modular architecture built for demanding commercial, government, and defense applications. Seamlessly integrated through a robust Ethernet API, every FPA amplifier delivers precise, efficient, and reliable power for long-range communications—whether fixed-site, distributed, or networked.

Designed for full compatibility with the ML-9600-series SDR exciter family, the FPA lineup offers +10 dBm exciter inputs and scalable output stages ranging from 1 kW to 40 kW and beyond. Whether deploying a compact 1 kW solution or building a multi-kilowatt system for continent-spanning HF links, the FPA series provides the flexibility, performance, and control required for next-generation HF networks.

The FPA-1K delivers mission-grade, 1 kW HF amplification with exceptional efficiency, continuous 100% duty-cycle performance, and an intuitive Ethernet-based control interface. Built for seamless integration with the ML-9600 series or customer-provided exciters, it combines advanced thermal management, comprehensive protection systems, and real-time monitoring to provide reliable, standards-aligned HF power for fixed-site and remote installations.

Key Capabilities

• • High Efficiency Architecture — Class-AB amplification with advanced thermal management minimizes heat and maximizes operating efficiency.
  • Web-Based Control & Monitoring — Thin, browser-based UI plus Ethernet API and RS-422 control for effortless integration and real-time visibility.
  • Comprehensive Protection Systems — Multi-sensor thermal management, VSWR protection, foldback control, and BIT reporting reduce downtime and prevent damage.
  • True Continuous Operation — Rated for 100% duty cycle across all modes, supporting demanding 24/7 communication and data requirements.
  • Open, Future-Ready Interface — Ethernet API enables software-defined updates, automation, and integration into modernized HF architectures.

Flexible Exciter Compatibility — Accepts +10 to +20 dBm input, optimized for ML-9600 family exciters but adaptable to customer platforms.

The FlexRadio FPA-5K delivers continuous 5 kW HF power for fixed-site, high-availability communications systems. Built on a modular, software-defined RF architecture with Ethernet-based control, the FPA-5K provides exceptional efficiency, advanced protection, and continuous 100% duty-cycle operation for demanding long-haul, data-intensive, or high-power networked HF systems. Designed for seamless integration into existing infrastructure, the FPA-5K scales effortlessly into multi-kilowatt systems and supports modernized, always-on HF communications.

Key Capabilities

• • Unmatched Efficiency: High-performance RF amplification with optimized thermal management for reduced energy usage and sustained output.
  • Simplified Operation: Thin, web-based management interface provides intuitive real-time monitoring and control from any networked device.
  • Advanced Protection: Built-in fault detection, thermal protection, and power conditioning minimize downtime and extend system life.
  • Continuous High-Power Performance: Engineered for full 100% duty cycle, supporting extended digital operations and high-demand mission profiles.

Future-Ready Integration: Ethernet API enables software-defined control, remote management, and straightforward upgrades as requirements evolve.