• U4B - Balloon tracker

The world's cheapest, lightest, simplest yet most flexible and expansion-capable WSPR high altitude balloon tracker ever! Includes USB interface for configuration, 128K disk, tons of features... perfect for hobbyists, research, education and more.

Offers both a simple-to-use configuration (as simple as just entering your callsign), and much more complex customizability including 19 GPIOs and I2C bus for further sensors and controls. Telemetry uses the QRP Labs telemetry-over-WSPR protocol or you can use CW, FSKCW, DFCW, QRSS, Hellshreiber (standard and slow MFSK), WSPR, JT9, JT65.

Complete end-to-end tracking and data collection is included - create your own flight tracking page on the QRP Labs site with live mapping and download capabilities for your telemetry.

List of features: 

  • 33.0 x 12.7mm PCB (plus removable protrusion with micro-USB connector)
  • Weight: 1.8g (with micro-USB protrusion removed)
  • 32-bit ARM microcontroller running QDOS (QRP Labs Disk Operating System)
  • 128K disk (implemented on EEPROM chip)
  • 27mW (approximately) transmitter using Si5351A synthesizer
  • TCXO referenced frequency stability
  • Band coverage 2200m to 2m
  • LM75 temperature sensor
  • Status LED
  • USB interface for configuration, programming and easy firmware update (just copy the new firmware file into the apparent USB Flash drive)
  • Free firmware updates for life, when enhancements are developed as the use cases expand

Full details, see main QRP Labs U4B page

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U4B - Balloon tracker

  • Product Code: U4B
  • Availability: Out Of Stock
  • $59.00