New Digital modes transceiver from QRPLabs – QDX

Hans Summers has done it again with an amazing new product for kit builders, QRP and digital enthusiasts with the new QDX transceiver. News of the new product release broke last week sending QRP Labs fans into a frenzy on the QRP Labs Google group. An initial batch of 450 units was released on at 1800Z on 11 October with all units sold in 12 minutes! Wow, that’s popular!

The initial batch has been limited in number due to a current global lack of semiconductors although Hans has promised at least one further batch will be available once his supply situation improves. In the meantime, I was pleased to get my order in (despite a number of glitches caused by the online sales portal being overloaded by the sheer number of folks trying to secure their QDX).

All being well the QDX will be here in the UK in a week or so and I will then, as time permits, document the build and operating on here.

Outline details and specs are here:

  • Four bands 80, 40, 30 and 20m
  • 5W output at 9V supply (can be built for 4-5W at 12-13V supply)
  • Single signal transmission (zero unwanted sideband, zero residual carrier, zero intermodulation distortion)
  • Solid-state band switching and transmit/receive switching under CAT control
  • High performance embedded SDR SSB receiver with 60-70dB of unwanted sideband cancellation
  • Built-in 24-bit 48ksps USB sound card
  • Built-in USB Virtual COM Serial port for CAT control
  • Si5351A Synthesized VFO with 25MHz TCXO as standard
  • Easy to build single-board design, Professional quality double-sided, through-hole plated, silk-screen printed PCBs
  • All SMD components factory assembled
  • Connectors: 2.1mm power barrel connector, USB B (for audio and CAT control), BNC RF input/output
  • Built-in test signal generator and testing tools
  • Receive current 100mA, Transmit current 1.0-1.1A for 5W output with 9V supply (around 0.7A for 5W with 13V supply).
  • QFU firmware update for lifetime free firmware updates, easy installation on any PC without drivers, software or hardware e.g. programmer
  • Optional aluminum extruded cut/drilled/laser-etched black anodized enclosure

See Hans’ website for more details: and the DRAFT manual here: The ordering page is here:

Finally, to whet the appetite, here is a YouTube video outlining the new kit:

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