USDX-SOTA PCB KIT

ADX BARB SOTA TRX – uSDX Modular SDR HF Transceiver PCB Kit (With ATU + Band Filter System)

The ADX BARB SOTA TRX PCB Kit is a complete modular hardware platform designed for building a uSDX-based SDR HF QRP transceiver system. This kit provides all the essential printed circuit boards required to construct a fully functional SOTA-ready transceiver, including support for an automatic antenna tuner (ATU) and band-pass filter system.

Based on the modular uSDX SOTA architecture, this design follows a stackable multi-board system approach, allowing RF, control, and filtering stages to be separated for improved performance, easier assembly, and cleaner RF layout.

This kit is supplied as a 5 PCB set, including the front and rear panel boards along with the main functional modules. The modular structure allows builders to assemble a compact and highly capable HF transceiver suitable for portable, field, and SOTA (Summits On The Air) operation.

The system is designed around the proven uSDX SDR transceiver concept, which uses a simplified architecture to deliver multi-band HF operation, digital mode capability, and efficient QRP power output. The included ATU and band filter board integration provides improved antenna matching and band selection flexibility, making it suitable for a wide range of HF operating conditions.

This PCB set is ideal for experienced amateur radio builders who want a fully modular HF SDR transceiver platform with expandability and real-world field usability.

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Key Features

• Complete 5 PCB kit for uSDX SOTA-based transceiver build
• Includes front panel and rear panel PCBs
• Supports ATU (Automatic Antenna Tuner) integration
• Includes band-pass filter board support
• Modular stacked PCB architecture (main, RF, control, filter, and panels)
• Designed for HF QRP SOTA portable operation
• Based on proven uSDX SDR transceiver architecture
• Suitable for multi-band HF operation with filter swapping
• Optimized for compact enclosure integration

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System Overview

The ADX BARB SOTA TRX system is built using a modular block architecture, where each functional stage is separated into dedicated PCBs:

• Main transceiver control board
• RF processing stage
• Band-pass filter board system
• Optional ATU (antenna tuning unit) board
• Mechanical front and rear interface panels

This structure allows easy upgrades, troubleshooting, and customization while maintaining strong RF performance and mechanical stability in a compact enclosure.

The system is intended for portable HF operation (SOTA / POTA / field use) where size, efficiency, and flexibility are critical.

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Applications

• SOTA (Summits On The Air) portable operation
• QRP HF amateur radio operation
• uSDX SDR transceiver builds
• Multi-band HF experimental radio projects
• Modular RF system development
• Educational SDR and transceiver construction

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What’s Included

• 5 × PCB set (complete ADX BARB SOTA TRX system)
  • Main system PCB(s)
  • ATU / RF integration board
  • Band filter PCB
  • Front panel PCB
  • Rear panel PCB