Upgraded USDX+ R1.02W Portable Ham Radio | 8-Band HF SDR Transceiver for SSB, CW, and FT8 QRP

Upgrade your portable ham radio setup with the newly refined R1.02W USDX+ (uSDX Plus) SDR QRP Transceiver. Engineered for maximum versatility, this highly compact transceiver delivers 3-5W of output power across 8 full HF bands (80M, 60M, 40M, 30M, 20M, 17M, 15M, 10M).

The R1.02W version features an optimized PCB layout, improved power amplifier (PA) efficiency, and clearer audio processing. Built on an advanced Software Defined Radio (SDR) and Digital Signal Processing (DSP) architecture, it supports multiple modes including LSB, USB, CW, and experimental AM/FM. Equipped with a built-in microphone, high-visibility screen, and a rugged aluminum enclosure, the USDX+ is the ultimate lightweight companion for SOTA (Summits on the Air), POTA (Parks on the Air), and portable QRP operations.

3W-5W USDX+ HF Transceiver Shortwave QRP SSB/CW Transceiver All Mode 8 Band Upgraded Version Of USDX

Note:
-Due to different production batches, the goods may have different appearance but with the same effect. The picture is for reference only, subject to the actual product delivered!

Description:
This is a shortwave QRP SSB/CW transceiver. Ultra-small size makes it easy to carry for outdoor use. It boasts a 1602N LCD screen and a built-in speaker. It supports connection to a PC and uses FT8, JS8, FT4 and other digital mode software control, and supports CW automatic decoding.

Features:
– 8 bands: 3.5Mhz～3.9MHz, 5351.5-5366.5kHz, 7MHz～7.3MHz, 10.1MHz～10.150MHz, 14MHz～14.350MHz, 18.068 MHz～18.168MHz, 21MHz～21.450MHz and 28MHz～29.700MHz
– Excellent PCB layout design in line with high-frequency circuit design principles to ensure excellent performance
– Whether using an external 13.8v power supply, it can reach 3-5W power in 8 bands, and reserve the SOT-223 and TO-220 package pads required for upgrading
– High emission efficiency, 80m/60m/40m/30m/20m efficiency is higher than 80%, 17m efficiency is higher than 70%, 15m/10m efficiency is higher than 60%
– High-precision TCXO for KDS, frequency accuracy is better than 1PPM, frequency stability is better than 0.5PPM
– Ultra-small size: 83 x 38 x 124mm/3.3 x 1.5 x 4.9″ (excluding protruding parts)
– Abundant interfaces (CAT, PTT OUT, MIC/KEY, K-head microphone)
– All LPF parts use 100V C0G/NP0 capacitors
– Use original magnetic latching relays for Omron
– Use op amp chip with lower noise than LM4562
– Built-in speaker with cavity
– BNC antenna interface

List of Functions:
– Simple, fun and versatile QRP SSB HF transceiver with embedded DSP and SDR functions;
– EER Class-E driven SSB transmit-stage
– Approximately 5W PEP SSB output from 13.8V supply
– All-Mode support: USB, LSB, CW, AM, FM
– DSP filters: 4000, 2500, 1700, 500, 200, 100, 50 Hz pass-band
– DSP features: Automatic Gain Control (AGC), Noise-reduction (NR), Voice-triggered Xmit (VOX), RX Attenuators (ATT), TX noise gate, TX drive control, Volume control, dBm/S-meter
– SSB opposite side-band/carrier suppression Transmit: better than -45dBc, IMD3 (two-tone) -33dBc, Receive: better than -50dBc
– Multi-band support, continuously tunable through bands 160m-10m (and from 20kHz to 99MHz with loss in performance)
– Open source firmware, built with Arduino IDE; allows experimentation, new features can be added, contributions can be shared via Github, software-complexity: 2000 lines of code
– Software-based VOX that can be used as fast Full Break-In (QSK and semi-QSK operation) or assist in RX/TX switching for operating digital modes (no CAT or PTT interface required), external PTT output/PA control with TX-delay
– Simple to install modification with 8 component changes and 8 wires
– Lightweight and low-cost transceiver design: because of the EER-transmitter class-E stage it is highly power-efficient (no bulky heatsinks required), and has a simple design (no complex balanced linear power amplifier required)
– Fully digital and software-based SSB transmit-stage: samples microphone-input and reconstruct a SSB-signal by controlling the phase of the SI5351 PLL (through tiny frequency changes over 800kbits/s I2C) and the amplitude of the PA (through PWM of the PA key-shaping circuit)
– Fully digital and software-based SDR receiver-stages (optionally): samples I/Q (complex) signal from Quadrature
– Sampling Detector digital mixer, and performs a 90-degree phase-shift mathematically in software (Hilbert-transform) and cancels out one side-band by adding them
– Three independent switchable analog front-end receiver attenuators (0dB, -13dB, -20dB, -33dB, -53dB, -60dB, -73dB)
– Receiver Noise floor MDS: -135 dBm at 28MHz (in 200Hz BW)
– Receiver Front-end selectivity: steep -45dB/decade roll-off +/-2kHz from tuned-frequency
– Blocking dynamic range: 20kHz offset 123dB, 2kHz offset 78dB
– CW decoder, Straight/Iambic-A/B keyer
– VFO A/B + RIT and Split, and corresponding relay band-filter switching via I2C
– CAT support (TS480 subset)

Specifications:
– Type: HF QRP SDR Transceiver
– Mode: SSB/CW
– Rf output: 10W max at 13.8V exit DC in
– Frequency range: 3.5-30MHz
– Built-in MIC
– Antenna/connector: 50Ω/SO-239

– With built-in 4000mah lithium battery

FAQ

Q1: What are the main upgrades in the R1.02W version of the USDX+?
A: The R1.02W version of the USDX+ features a refined PCB layout, enhanced power efficiency, improved heat dissipation, and optimized audio circuitry. This results in cleaner transmit signals and better receiver performance compared to earlier uSDX iterations.

Q2: What frequency bands does the USDX+ cover?
A: This transceiver is a true 8-band radio. It covers the 80m (3.5 MHz), 60m (5.3 MHz), 40m (7 MHz), 30m (10 MHz), 20m (14 MHz), 17m (18 MHz), 15m (21 MHz), and 10m (28 MHz) amateur radio bands.

Q3: What is the power output of this radio?
A: The USDX+ provides between 3W to 5W of RF output power, depending on the band being used and the operating voltage (typically 13.8V). This makes it highly effective for QRP (low-power) communications.

Q4: Does the USDX+ support digital modes like FT8?
A: Yes. The USDX+ can be used for digital modes such as FT8, RTTY, and PSK31. By connecting the radio to a computer via the audio and CAT interfaces, you can interface it with popular software like WSJT-X.

Q5: What are the DSP features included in this transceiver?
A: The built-in Digital Signal Processing (DSP) includes selectable audio filters (4000, 2500, 1700, 500, 200, 100, and 50 Hz), Automatic Gain Control (AGC), Noise Reduction (NR), Voice Triggered Xmit (VOX), and an RX Attenuator (ATT).

Q6: Does it require an external microphone?
A: The USDX+ has a built-in microphone for high-convenience portable operation, though an external microphone/headset can also be connected via the built-in audio jacks for better audio quality.