QCX+ Radio

Features

• QCX+ 5W Single Band CW transceiver kit - QRP Labs
  • Operating Manual
  • Assembly manual for PCB Rev 3
  • Troubleshooting Guide
• IQ Radio - Direct Conversion
  • Quadrature Sampling - Tayloe Detector
    • Ultra Low Noise, High Performance, Zero IF Quadrature Product Detector and Preamplifier - By Dan Tayloe
  • Phasing Network based on the NC2030
• ATMega32 controller (like Arduino but not the Arduino IDE)
  • Proprietary ATMEGA328 Firmware
  • 2 x 3-pin standard AVR header for In-Circuit-Programming on the board
• Easy to build, spacious 13 x 10cm main board, separate front panel board with all controls board-mounted
• Professional quality double-sided, through-hole plated, silk-screen printed PCBs
• Choice of single band, 80, 60, 40, 30, 20 or 17m
  • I built 40 Meters
• Approximately 3-5W CW output (depending on supply voltage)
• 7-16V recommended supply voltage
• Class E power amplifier, transistors are bolted to the PCB as a heatsink, though heat dissipation is minimal
• 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
  • Based on the HyperMite by Dave NBMOS
• Si5351A Synthesized VFO with rotary encoder tuning
• 16 x 2 blue backlight LCD screen
• 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
• 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 or WSPR operation
• GPS interface for reference frequency calibration and time-keeping (for WSPR beacon)
• CAT control serial data interface
  • 38400 baud serial port
  • Omni-Rig 1.20
• Optional 50W PA kit
• Optional Enclosure
• Optional TCXO module
• Optional Dev kit

Dev Kit

The QSX+ dev kit consists of the following items

• 95 x 120mm PCB
• 4pcs 12mm nylon hex spacer for mounting the PCB above the main QCX+ board
• 8pcs 6mm M3 nylon screw
• 8pcs 2-way female header connector
• 1pcs 20-way male header connector (may be broken into smaller pieces as desired)

Holes for fitting pin header connectors that mate with connectors on the main QCX+ PCB, for

• Power (Gnd, +5V, 12V)
• Si5351A Clk0/1/2 outputs)
• I2C bus
• ISP header
• Frequency counter, DVM and RF Power inputs
• I and Q outputs (IC5 pin 1 and 7)
• I and Q path phase shift outputs
• CW filter input and output
• Audio amplifier input and output
• GPS header
• CAT control and PTT signals
• All pins of the PTT, CAT and Audio connectors

Enclosure

Build

• Sockets (purchased separately)
  • 8 PIN - Mill-Max 115-47-314-41-001000
  • 14 PIN- Mill-Max 115-47-314-41-001000
  • 28 PIN- Mill-Max 110-99-328-41-001000

Videos

NA5Y Series

• Built by function