Partial assembled PCB Wolf-Mini +T DUC/DDC SDR HF Transceiver All Mode 20W UA3REO TFT 2.4 inch FT8 WiFi

A set of circuit boards for self-assembly of the Wolf-Mini transceivers from UA3REO. 

Motherboard - almost fully assembled, missing: VCXO, ADC, ADC driver, DAC, transformers, flash IC.

Front board - almost fully assembled, missing: TFT LCD, 7 ceramic capacitors, 2 tantalum capacitors, keys.

Other boards are empty.

Principle of operation

The RF signal is digitized by a high-speed ADC chip and fed to an FPGA processor.
It performs DDC / DUC conversion (digital frequency shift down or up the spectrum) - by analogy with a direct conversion receiver.
The I and Q quadrature signals from the conversions are fed to the STM32 microprocessor.
It filters, (de) modulates and outputs audio to an audio codec / USB. It also handles the entire user interface.
When transmitting, the process occurs in the opposite order, only at the end of the chain there is a DAC, which converts the digital signal back to analog RF.

• Receiving frequencies: 0 Mhz - 150 Mhz, band filters for ham bands
• Transmission frequencies: 0 MHz - 55 Mhz, amplifiers for ham bands 
• TX power: 20W (HF)
• Automatic antenna tuner (ATU)
• Modulation types (TX / RX): CW, LSB, USB, AM, FM, WFM, DIGI
• LNA, Preamplifier
• Adjustable attenuator 0-31dB
• Band pass filters
• ADC dynamic range (16 bit) ~100dB
• Supply voltage: 13.8V

• TFT Display: 2.4 inch

• Panorama (spectrum + waterfall) up to 384 kHz wide
• Panorama tweaks and themes
• Dual receiver (mixing A + B or A&B audio in stereo)
• Adjustable bandwidth: HPF from 0Hz to 2700Hz, LPF from 100Hz to 20kHz
• Integrated SWR/power meter (HF)
• Automatic and manual Notch filter
• Switchable AGC (AGC) with adjustable attack rate
• Range map, with the ability to automatically switch modes
• Digital Noise Reduction (DNR), Pulse Noise Reduction (NB)
• CAT virtual COM port (FT-450 / TS-2000 emulation, RTS - PTT, DTR - CW)
• USB operation (audio transmission, IQ, CAT, KEY, PTT)
• RDS/CW/RTTY decoder, self-control, gauss filter
• SWR Graphs
• Spectrum analyzer
• FT8 receiver/transmitter
• Automatic send FT8 qso to log https://allqso.ru/
• WSPR Beacon
• VOX
• Equalizer TX/RX, reverber
• SSB/FM Scanner mode
• Support SDHC/SDSC/SDXC memory cards up to 16Gb
• WAV files radio recording and playback, fast broadcast recorded CQ message
• AGC takes into account the characteristics of human hearing (K-Weighting)
• TCXO frequency stabilization (it is possible to use an external clock source, such as GPS)
• WiFi operation: Time synchronization, virtual CAT interface (see Scheme/WIFI-CAT-instruction.txt)
• Tangent support Yaesu MH-36 и MH-48
• Hardware self-testing
• Firmware update over USB, SD, WiFi
• Digital pre-distortion
• And other.. (see menu)

Sensitivity at 10 dB SNR, LNA enabled:

• <150 MHz  -127 dBm

Community telegram channel: https://t.me/TRX_Wolf