$30.34
$40.96
USDX-CW/USDX-FT8 5W usDX SDR QRP Transceiver QCX-SSB to SSB 15m/20m/40m 3-Band All Mode HF Transceiver With Bluetooth Advantages: * Less than 5W in 15m, 20m and 40m bands * With a firmware upgrade interface. Through this interface, you can update the firmware for USDX-CW or USDX-FT8 transceiver * With an aluminum alloy housing * Later, the firmware of CW and FT8 versions can be flashed for each other Attention: * Menu 8.6 is the CAT data switch. Please turn it off when FT8 is not used. * When the firmware is for CW version, please turn off the CAT data switch in menu 8.6 to avoid the screen displaying incomplete frequency text (mainly due to a bug in the firmware). About Bluetooth: * The CW and FT8 versions support Bluetooth. * CW version: Turn off the Bluetooth function if you do not want to use it. * FT8 version: Menu 8.6 CAT data switch should be turned on. At the same time, the radio in Bluetooth mode should be powered by the physical Bluetooth switch. In this way, the radio’s Bluetooth function can be used. Description: USDX SDR QRP transceiver is a 3-band HF transceiver. Using TCXO, its operating frequency stability is up to 0.5PPM. It is optimized and modified based on the open-source work uSDX/QCX-SSB. The open source URL is: The USDX QRP shortwave transceiver operates in LSB, USB, and CW modes, covering the 40m, 15m, and 20m amateur radio bands. It has a power output of less than 5W and features a 1602 LCD screen. The casing is partially made of aluminum alloy. The dimensions are 10.05cm x 3cm x 7.5cm (excluding protrusions), with slight variations possible due to manual measurement. Included as a bonus are AM, FM, and Bluetooth FT8 functionalities. Users can experiment with FT8, AM, and FM using a computer or mobile phone via Bluetooth. Please note that these bonus features are intended for entertainment and research purposes only and are not part of the product’s official specifications. Disputes related to these bonus features will not be entertained. If you do not agree with these terms, please refrain from purchasing this product. The CW version supports LSB, USB, and CW modes but does not support FT8. The FT8 version includes AM, FM, and Bluetooth functionalities. Although the Bluetooth FT8 version does not display CW decoding, it still allows CW operation.For customers interested in both modes, please contact our customer service. We will provide firmware for both versions, and you can switch between them by updating the firmware. The package includes the main unit, a power cable, and a hand microphone. A 12V power supply is not included. List of Features: * 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 passband * DSP features: Automatic Gain Control (AGC), Noise-reduction (NR), Voice-triggered Xmit (VOX), RX Attenuator (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 * Open source firmware, built with Ar-duino 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 hardware design with only 4 ICs, a micro-controller and few transistors/passives * 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), possibility to stream audio, keys, display-text over CAT * Optional SWR/Power measurement and PA efficiency/overload control * Probably the most cost effective and easy to build standalone SDR/SSB transceiver that you can find. Very much simplified circuit and versatile in use Schematic: Specifications: * Working voltage: DC 13.8V 2A (Note: it is easy to burn out the radio if the voltage is too high) * DC power plug specifications: 5.5*2.1 (Attention: Positive inside and negative outside. Reverse connection is not allowed) * Operating frequency band: 40m, 20m and 15m bands * Receiver sensitivity: ≥-100dbm * Transmit power: Less than 5W * Audio output power: 2W * Headphone jack: With * Morse key jack: With (Plug specification is 3.5mm. It supports manual and automatic CW keys, set by yourselves in the menu. Manual CW key is supported by default) * Antenna interface type: BNC Description of the Functions of the USDX Menu: Common menu function keys and options: 1.1. Volume preamplifier 1.2. Mode selection 1.3. Bandpass selection 1.4. Band selection 1.8. Gain attenuation for receiving 1.12. Display category selection 2.2. Sidetone frequencies 600Hz and 700Hz 2.4. Transmit and receive delay ON 2.5. Speed of automatic CW keyer 2.6. Selection of CW key types 2.7. Left/right hand habit selection 2.8. ON is for Morse code trainer, and OFF is for TX 2.9. Sidetone volume 0-16 3.1. Voice-activated PTT 3.2. Voice-activated sensitivity 3.3. Voice-activated volume 4.1. Automatic call interval time 4.2. Automatic calls 8.1. Minimum voltage of the grid of transmitting tube: 0-255 8.2. Maximum voltage of the grid of transmitting tube 8.3. Reference frequency adjustment. TCXO 0.5PPM generally does not need to be adjusted 8.6. CAT data switch. It should be turned off if FT8 is not used. Package Included: * 1 x transceiver * 1 x Handheld microphone * 1 x Power cable Packaging Details: * Weight: 0.6kg FAQ: Q: Does the product include batteries? What is the capacity of the battery? A: The product does not contain batteries. The transceiver should be plugged into DC 12V or 13.8V. The voltage should not be too high because it is easy to burn out the radio. Note: * Batteries are not included in the package. FAQ Q1: What is the USDX SDR QRP Transceiver? A: The uSDX is a simple and experimental Class-E driven SSB and CW SDR transceiver. It can be fully-continuous tuned through bands 80m-10m in the LSB/USB-modes with a 2400Hz bandwidth has up to 5W PEP SSB output and features a software-based full Break-In VOX for fast RX/TX switching in voice and digital operations. It’s available in 3-band (15m/20m/40m) and 8-band (80m-10m) versions. Q2: What bands does the USDX transceiver cover? A: The USDX comes in two versions: 3-Band Version: Covers the 40m, 15m, and 20m amateur radio bands (7MHz, 14MHz, 21MHz) 8-Band Version: Bands: 80m/60m/40m/30m/20m/17m/15m/10m (3.5MHz to 30MHz frequency range) Q3: What modes does the USDX support? A: All-mode support: USB, LSB, CW, AM, FM. For digital modes, it supports connection to a PC and uses FT8, JS8, FT4 and other digital mode software control, and supports CW automatic decoding. Q4: What is the power output of the USDX? A: Approximately 5W PEP SSB output from 13.8V supply. Up to 3-5W power in 8 bands depending on the band and configuration. Q5: What DSP features does the USDX have? A: DSP filters: 4000, 2500, 1700, 500, 200, 100, 50 Hz passband. DSP features: Automatic Gain Control (AGC), Noise-reduction (NR), Voice-triggered Xmit (VOX), RX Attenuator (ATT), TX noise gate, TX drive control, Volume control, dBm/S-meter. Q6: How do I use the USDX for FT8 digital modes? A: For FT8 (and any other digital) operation, select one of the pre-programmed FT8 bands by double press the rotary encoder, connect the headphone jack to sound card microphone jack, sound card speaker jack to microphone jack, and give a long press on right button to enter VOX mode. The FT8 version includes Bluetooth functionality for wireless operation. Q7: What is the frequency stability of the USDX? A: Using TCXO, its operating frequency stability is up to 0.5PPM. Adopting KDS high-precise TCXO, the frequency accuracy and stability surpass similar products. Q8: Is the USDX open source? A: Yes! It is optimized and modified based on the open-source work uSDX/QCX-SSB. The open source URL is: https://github.com/threeme3/usdx. The firmware can be modified and upgraded using Arduino IDE. Q9: Can I upgrade the firmware between CW and FT8 versions? A: Through this interface, you can update the firmware for HAMGEEK USDX-CW or HAMGEEK USDX-FT8 transceiver. Later, the firmware of CW and FT8 versions can be flashed for each other. Q10: What power supply does the USDX require? A: The HamGeek transceiver should be plugged into DC 12V or 13.8V. The voltage should not be too high because it is easy to burn out the radio. The package typically does not include batteries or power supply. Q11: What is the VOX function used for? A: 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). This allows hands-free operation and quick RX/TX switching. Q12: What are the dimensions of the USDX? A: The dimensions are 10.05cm x 3cm x 7.5cm (excluding protrusions), with slight variations possible due to manual measurement. The compact size makes it ideal for portable operations. Q13: What’s included in the package? A: The package includes the main unit, a power cable, and a hand microphone. A 12V power supply is not included. Q14: What is the difference between USDX-CW and USDX-FT8 versions? A: The main difference is the firmware focus. The Bluetooth FT8 version does not display CW decoding, it still allows CW operation. The CW version emphasizes CW decoding on the display, while the FT8 version includes Bluetooth for wireless digital mode operation. Both versions can be converted by firmware updates. Q15: What is the transmission performance of the USDX? A: SSB opposite side-band/carrier suppression transmit: better than -45dBc, IMD3 (two-tone) -33dBc, receive: better than -50dBc. This provides clean transmission with low distortion and excellent opposite sideband suppression.
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