HFDY Malahit DSP SDR v3

Malahit DSP SDR V3 50KHz - 2GHz DSP SDR Receiver. This is an all-in-one portable SDR that is controlled via a touch screen and two encoders. In a review it was concluded the quality of the HFDY unit exceeds that of the Russia-made DSP-2.

New V3 Malachite Radio Dual Antenna Latest Version 1.10D Malahit-DSP Stereo Portable 3rd Version SDR Receiver 50KHz-2GHz

1. Based on the SDR architecture, the msi001 radio frequency front-end 12bit quantization sampling is adopted, and the processor adopts STM32H743, the main frequency is up to 480 MHz;
2. The receiving frequency is 50kHz to 49.999MHz, 50.001MHz to 249.999MHz, 400MHz to 2GHz;
3. Demodulation type: AM, SSB, NFM, WFM, CW;
4. Sensitivity is better than 0.2-0.3μV;
5. Anti-blocking is better than 85 dB;
6. Real-time sampling bandwidth is 160 kHz;
7. Function: variable filter, adaptive noise reduction, threshold noise reduction, noise suppressor, AGC, equalizer, etc.;
8. Display screen is IPS 3.5 inches, capacitive touch screen with backlight adjustment;
9. The battery capacity is 3000mAh, USB-TYPEC interface;
10. The working current does not exceed 300mA;
11. Optional front-end attenuation filter components, attenuation up to 30dB;
12. Connect to the computer via USB, which can realize CAT, IQ and audio communication;
13. The size of the whole machine is 147×77×25mm.

The HFDY Chinese model is advertised as: HFDY Registered 50K-2GHz V1.10d Malahiteam SDR Receiver Radio DSP SDR Receiver 3.5" Touch LCD with Code support Two Antenna V3

Basic Usage

two antenna connectors

Each of these sma connectors has an LED indicator next to it that shows whether that particular antenna is being used, either 50 ohm or Hi-Z. If you have the HDFY Chinese version you will notice that both may remain connected at the same time.

Firmware

How do you find out the firmware version

How to upgrade the firmware. The dfu-utils package on Ubuntu and similar distributions is installed by typing:

sudo apt install dfu-utils

The HFDY Malahit SDR V3 firmware is adequate and offers most of the features that are important in comparison with the Russia-made DSP-2.

• 1.10c Firmware on Chinese Clone

The HFDY SDR uses 1.10c firmware whereas the Russian-made DSP-2 uses the latest official 2.10D firmware.

PC Connection

The Malahit SDR will not charge off the computer USB port if the Malahit SDR is not powered on. When powered on, it will both charge and connect to the PC as an external sound card. It appears as an external sound device. It is capabile of both input and output sound. When connected it will appear (address may vary) as:

Bus 003 Device 112: ID ffff:0737 MicroGenSF Malahit reciever

It is visible in PulseAudio Control

The audio is available for capture and recording using software such as Audacity. In order to hear the audio from the capture device you will need a loopback module active, same as if you wanted to monitor the audio on your live microphone.

Module should automatically create loopback outputs for available input devices. To load the module manually

pactl load-module module-loopback

To make the change persistent, append /etc/pulse/default.pa with

load-module module-loopback

To stop it running, run:

pactl unload-module module-loopback

Loopback quality is poor for some reason, there is a timing issue.

The Malachite-DSP also supports CAT and IQ connections to a host PC. The Malachite-DSP "borrows" the CAT (Rig Control) profile of a Kenwood TS-480. When the Malachite-DSP is connected to the Linux computer via USB, it creates several serial ports such as:

• /dev/ttyACM0
• /dev/ttyACM1