uSOTA-ATU USDX SDR Transceiver 8 Band HF Ham Radio QRP CW Transceiver ATU-100 Antenna Tuner Dual Screen Display

Description

Theoretically, AM and FM modes are supported, but the effect of these two modes is very poor, which can be almost useless. If you need a normal radio station in AM and FM mode, please do not buy this product.
uSDX_ATU:
1. uSDX: HF QRP SDR Transceiver
uSDX is optimized and modified based on Guido PE1NNZ's open source project uSDX/QCX-SSB. uSDX is a shortwave QRP SSB/CW transceiver. With 1602 LCD screen and ultra-small size, it is easy to carry.

Open source address: https://github.com/threeme3/QCX-SSB
Discussion group: https://groups.io/g/ucx/topics

2. ATU: (Automatic Antenna Tuner Unit):
Automatic Antenna Tuner Unit is a miniaturized clone of David Fainitski, N7DDC’s infamous 7X7 ATU100 automatic antenna tuner unit adapted for QRP operation up to 10 watts.

uSDX_ATU Performance Characteristics:

1. uSDX:
- 8 bands: 3.5MHz; 5.3MHz; 7MHz; 10MHz; 14MHz; 18MHz; 21MHz; 29MHz
- Emission efficiency: higher than 85% ( 3.5MHz; 5.3MHz; 7MHz; 10MHz; 14MHz); higher than 80% (18MHz and 21MHz); higher than 70% for 29MHz
- Connect to PC, use FT8, JS8, FT4 and other digital mode software control, support CW automatic decoding
- It can reach 3-5W power in 8 bands and can freely upgrade the PA module (TO-220)
- High-precision TCXO for KDS, frequency accuracy better than 1PPM, frequency stability better than 0.5PPM
- Independent core board, RF PA board and ATU board to avoid own signal interference
- Ultra-small size: 100 x 90 x 57mm/3.9 x 3.5 x 2.2" (without protrusions)
- All LPF parts use 100V C0G/NP0 capacitors
- Use original LM4562 or LM833 or LT6231 op amp chip
- Rich interfaces: HEADPHONE, PTT OUT, MIC/PTT, SPK/MIC
- BNC antenna interface (with BCN-SL16 adapter, easy to match antenna)
- External power supply: 12.6VDC (13.8VDC power adapter)

2. ATU:
- Maximum tuning inductance: 8.42µH
- Minimum tuning inductance: 0.05μH
- Maximum tuning capacitance: 1869pF
- Minimum tuning capacitance: 10pF

uSDX_ATU System Functions:
- Full mode support: USB, LSB, CW, AM, FM
- All-digital and software-based SDR receive channels
- All-digital and software-based SSB transmit channels
- Receive attenuator: 0dB, -13dB, -20dB, -33dB, -53dB, -60dB, and -73dB
- DSP filter bandwidths: 4000, 2500, 1700, 500, 200, 100, and 50 Hz
- Receiving background noise: –135dBm at 28MHz (BW=200Hz)
- Receiver Front-End selectivity: Tuning frequency -45dB/decade roll-off +/- 2kHz
- SSB/carrier suppression: transmit, better than 45dBc; receive, better than 50dBc
- DSP functions: 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

Three-Layer PCB:
- ATU-board
- PA-board: 8 band
- Mainboard

Rear Panel Connector (JACK):
1. Headphone Jack (3.5 mm):
Tip–Audio out
Ring–Audio out
Sleep–GND

2. MIC/PTT (KEY) Jack (3.5 mm):
Tip–Mic input
Ring–PTT
Sleep–GND

CW-KEY INPUT MODE:
Tip–DAH
Ring–DIT
Sleep–GND

3. SPK/MIC Jack (3.5 mm):
TIP: SPEAKER
RING 1: MIC
RING 2: PTT
SLEEVE: GND

4. PTT OUT Jack (3.5 mm):
Tip–SSR output
Ring–SSR output
Sleep–GND

Package Included:
- 1 x Main Unit uSDX_ATU
- 1 x 12.6VDC Power Adapter (or 13.8VDC)
- 1 x BNC-SL16 Adapter
- 1 x BNC-BNC Cable
- 1 x UV-3R Handheld Microphone (including MIC, PTT, SPEAKER functions)

Note:
- Note that there is no built-in battery or built-in speaker. External power supply 13.6v is required.

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