5W usDX SDR QRP HF Transceiver All Mode Transceiver Supporting 15M 20M 40M Bands + Blue Morse Key

5W usDX SDR QRP HF Transceiver All Mode Transceiver Supporting 15M 20M 40M Bands + Blue Morse Key

USDX Software Open Source:
https://github.com/threeme3/QCX-SSB/tree/feature-rx-improved

Some Hardware Open Source Sites:
https://dl2man.de/
https://antrak.org.tr/blog/projeler/usdx-an-arduino-based-sdr-all-mode-hf-transceiver-pcb-iteration-v1-02/
https://www.qsl.net/py2ohh/trx/usdx/usdx.html

Group:
https://groups.io/g/ucx/topics

Description:
This is a QRP SSB/CW HF transceiver. It boasts a 1602 screen, a built-in mic and a built-in speaker! It can be connected to an automatic key, and can be decoded by CW.

Features:
- It is durable, using IRF series MOSFET
- Can be used by connecting an antenna (BNC connector)
- 3 bands. With power standing wave digital display
- Dimensions: 80mm x 40mm x 100mm/3.1" x 1.6" x 3.9"
- Provides FT8 option connector later
- Aluminum shell with laser marking

Function List:
- Simple, interesting and versatile QRP SSB HF transceiver with embedded DSP and SDR functions
- EER class-E driven SSB transceiver
- 12V power supply provides about 5W maximum PEP SSB output
- All mode transceiver: supports USB, LSB, CW, AM and FM
- DSP filter: 4000, 2500, 1700, 500, 200, 100, 50Hz pass-band
- DSP function: automatic gain control (AGC), noise reduction (NR), voice trigger, voice trigger Xmit (VOX), RX attenuator attenuator (ATT), TX noise gate, TX driver control, volume control, dBm/S-meter
- SSB reverse side-band/carrier suppression transmission: better than -45dBc, IMD3 (two tones) -33dBc, reception: better than -50dBc
- Supports multiple bands. Continuously adjustable in the 160m-10m frequency band (and performance loss from 20kHz to 99MHz)
- Open source firmware, built in for Ar-duino IDE; allows experimentation. You can add new functions and share contributions through Github. Software complexity: 2000 lines of code
- Software-based VOX can be used as a fast full invasive (QSK and semi-QSK operation), or to assist in running in digital mode (without CAT or PTT interface) for RX/TX switching and external PTT output with TX/PA control-delay
- Simple installation modification with 8 component changes and 8 wires
- Lightweight, low-cost transceiver: Thanks to EER transmitter E-level, it has high power efficiency (no bulky heat sink required), and simple design (no need for complex balanced linear power amplifiers)
- SSB transmitter stage based entirely on software: By controlling the phase of the SI5351 PLL (via the tiny frequency change of I2C over 800kbit/s) and the amplitude of the PA (via the PWM of PWM) to sample the microphone input and reconstruct the SSB signal. PA key shaping circuit)
- Fully digital and software-based SDR receiver stage (optional): sample the I/Q (complex) signal from the quadrature sampling detector digital mixer, and perform a 90-degree phase shift in the software (Hilber transform) and eliminate one by adding side-bands
- Independent switchable analog front-end receiver attenuators (0dB, -13dB, -20dB, -33dB, -53dB, -60dB and -73dB)
- Receiver noise level MDS: -135 dBm (200Hz BW) at 28MHz
- Receiver front-end selectivity: steep tuning frequency -45dB / ten times roll-off +/- 2kHz
- Blocking dynamic range: 20kHz offset 123dB; 2kHz offset 78dB
- CW decoder and straight/Iambic-A/B keyer
- VFO A/B + RIT and and Split, and switch the corresponding relay band filter through I2C
- Supports CAT (TS480 subset). You can stream audio, press keys, and display text through CAT
- This is probably the most cost-effective transceiver and easy to build standalone SDR/SSB transceiver.
- Great simplification: It simplifies the original QCX circuit (that is, reduces the installation components by 50% and it does not require complex transformer windings nor require alignment procedures), and it is more versatile

Package Included:
- 1 x Transceiver
- 1 x Hand microphone
- 1 x Audio cable
- 1 x Morse key

Packaging Details:
- G.W.: 0.55kg

Note:
- Please fix the Morse key before using because it is 3D printed and light in weight.