1. Introduction
Thank you for purchasing this high performance single-band 5W CW transceiver kit, the
QCX-mini (for QRP Labs CW Xcvr mini). This kit has a long list of features!
Special portable-friendly features:
• Small size: 95 x 63 x 25mm enclosure (plus protrusions)
• Sunlight view-able, 16 x 2 yellow/green LCD screen, back-light can be switched
on/off
• Low current consumption (for example 58mA receive current, with 12V supply and
display back-light off)
• Low weight, 202 grams
• Sturdy extruded aluminium enclosure
• All-metal BNC short connector, bolted to enclosure
Standard QCX-series features
• Easy to build, two-board design, board with main circuit and connectors, display panel board
with LCD; all-controls board-mounted on a press-out sub-board. No wiring, all controls and
connectors are board-mounted
• Professional quality double-sided, through-hole plated, silk-screen printed PCBs
• Choice of single band, 80, 60, 40, 30, 20 or 17m
• Approximately 3-5W CW output (depending on supply voltage)
• 7-14V recommended supply voltage
• Class E power amplifier, transistors run cool…
• 7-element Low Pass Filter ensures regulatory compliance
• CW envelope shaping to remove key clicks
• High performance receiver with at least 50dB of unwanted sideband cancellation
• 200Hz CW filter with no ringing
• Si5351A Synthesized VFO with rotary encoder tuning
• Iambic keyer or straight key option included in the firmware
• Simple Digital Signal Processing assisted CW decoder, displayed real-time on-screen
• On-screen S-meter
• On-screen real time clock (not battery backed up)
• Full or semi QSK operation using fast solid-state transmit/receive switching
• Frequency presets, VFO A/B Split operation, RIT, configurable CW Offset
• Configurable sidetone frequency and volume
• Connectors: 2.1mm power barrel connector, 3.5mm keyer jack, 3.5mm stereo earphone
jack, 3.5mm stereo jack for PTT, 3.5mm stereo jack for CAT control, BNC RF output
• Built-in test signal generator and alignment tools to complete simple set-up adjustments
• Built-in test equipment: voltmeter, RF power meter, frequency counter, signal generator
• Beacon mode, supporting automatic CW, FSKCW or WSPR operation
• GPS interface for reference frequency calibration and time-keeping (for WSPR beacon)
• CAT control interface
• Optional 50W PA kit
• Optional aluminium extruded cut/drilled/laser-etched black anodized enclosure
No test equipment is required to build, align and operate this CW transceiver. Its innovative
self-alignment and self-test features will help and guide you in setting up the transceiver in
a few easy steps. The kit also includes a voltmeter, RF power meter, frequency counter and
signal generator which can aid in debugging and fault-finding.
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