

Make sure you have the correct manual version. NOTE: PCB Rev 4 kits shipped after 1 have four component changes. The PCB revision is the number in the bottom right corner. Please download the correct assembly instructions for your PCB revision. The assembly document includes circuit diagram and a detailed description of transceiver operation. GPS interface for reference frequency calibration and time-keeping (for WSPR beacon).Beacon mode, supporting automatic CW or WSPR operation.Built-in test equipment: voltmeter, RF power meter, frequency counter, signal generator.Built-in test signal generator and alignment tools to complete simple set-up adjustments.Onboard microswitch can be used as a simple straight Morse key.Connectors: Power, 3.5mm keyer jack, 3.5mm stereo earphone jack, BNC RF output.Configurable sidetone frequency and volume.Frequency presets, VFO A/B Split operation, RIT, configurable CW Offset.Full or semi QSK operation using fast solid-state transmit/receive switching.Simple Digital Signal Processing assisted CW decoder, displayed real-time on-screen.


7-element Low Pass Filter ensures regulatory compliance.

Class E power amplifier, transistors are bolted to the PCB as a heatsink, though heat dissipation is minimal.Approximately 3-5W CW output (depending on supply voltage).Professional quality double-sided, through-hole plated, silk-screen printed PCB.Easy to build, single-board design, 10 x 8cm, all controls are board-mounted.In case of any problems, please see the QCX trouble-shooting page. Please see QCX Frequently Asked Questions page for any queries you have. There are NO surface mount components to solder (two SMD ICs are already factory pre-soldered). See below for the long list of features! This is a kit of parts that you assemble yourself. The "QCX" is a 5W, single-band, high performance CW transceiver kit with WSPR beacon, and built-in alignment/test equipment. Same circuit, same firmware, same functional operation - but physical improvements. It has rotary encoder synthesised tuning, VFO A/B/Split, Iambic keyer, CW decoder, and more.ġ: The QCX kit has been replaced by the new QCX+ kit. QCX: a feature-packed, high performance, single-band 5W CW transceiver kit, with WSPR beacon and built-in alignment/test equipment.
