The QMX+ is a QRP transceiver from QRP Labs. It is similar to the QMX but covers more bands and is in a larger case with room for development. It is available both as a kit and assembled, although there is a long weight for assembled QMX.
qrp-labs.com/qmxp.html
Features:
Full 160m to 6m band coverage
CW, FSK Digi, and SSB (USB/LSB) modes
All features of QCX+ (VFO A/B/Split, RIT, Message and frequency memories, beacon, keyer, etc)
3-5W output at 12V supply (can be built for 3-5W at 9V supply)
SWR bridge built in
Internal RTC powered by the common CR2032 coin cell battery (battery not included)
Single signal digi mode 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 6-layer, through-hole plated, silk-screen printed PCBs
All SMD components factory assembled
Connectors: 2.1mm power barrel connector, USB-C (for audio and CAT control), BNC RF input/output, 3.5mm jacks for audio out, paddle/GPS/mic/PTT in, and PTT out
Built-in test signal generator and testing tools
GPS interface for frequency calibration, real time clock and location (internal WSPR beacon)
IQ output mode for use with SDR software
Switched mode regulators Receive current 80mA, Transmit current 1.0-1.1A for 5W output with 9V supply (around 0.7A for 5W with 12V supply).
Internal microphone ready for the future SSB firmware
11 GPIO ports including a 3.5mm stereo jack socket on the rear panel labelled "AUX" that may be configured as a serial port
Optional aluminium extruded cut/drilled/laser-etched black anodized enclosure
Weight: 578 grams including enclosure
One useful mod that both doubles RF out and makes the QMX_ more robust is to double the number of BS170 RF transistors.
qrp-labs.com/qmxp/qmxpmod/pa0rdt.html
You can also buy a kit that makes the mod neater and provides better cooling
w1nc.org/8x-finals-complete-kit
Some independent developers have developed software to run on a Tab5 that adds many features including a panadapter and FTx decoding. The Tab5 communicates with the QMX by USB and provides full control and audio interface.
github.com/SteffenLav/qmx-panadapter
The github site describes the software and has links to documentation and latest release.
Discussion on QRPLabs groups.io
groups.io/g/QRPLabs/message/170781
It is pictured here in a 3D printed holder and QMX+ stand with design available here:
The QMX+, Tab5, mount and accessories fit nicely in a small case meant for USB power supplies and cables.
www.amazon.com/dp/B08ZT1P3K4?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1
Top compartment:
Stand and Tab5
room for battery packs
Bottom compartment:
QMX+
power, USB, mic cable and earphones
mic and paddle