High-end SDR amateur radio


Many radio amateurs use PC with the classical transceiver. In one case it is a notebook, in other – desktop computer. A connection between those two devices every user solves according to its own preference. Somebody connects additional USB interfaces, somebody solders the wire harness. So when you want to go to the contest with the tuned working station, moving the equipment becomes “the pain in the neck”. In this case, you dream about having all that in one box and MB1 becomes a perfect solution for that.

The MB1 transceiver - is a new trend in amateur radio, a transceiver and a computer in a single package. It combines a classic design, developed over several decades, with the most advanced DUC/DDC SDR-technologies - Direct Digital Conversion (DDC) and Digital Up Conversion (DUC), plus a fully-featured high-end personal computer with an Intel Core i5 processor on board. The workstation is switched on with one button

  • Two independent receive channels with a bandwidth of 312 kHz

  • Broadband overview of up to 80 MHz
  • High-quality IPS 7" touchscreen display with a resolution of 1280x800 pixels
  • ExpertSDR2 software in two versions: for Desktop and for integrated GUI display
  • Opportunity to install any other software (applicable for Windows 10 OS) by the User
  • Record and play on air fragments (IQ files) with a bandwidth of up to 312 kHz

Features of the transceiver

  • An Independent receive path with Digital Direct Conversion (DDC)

  • A Separate independent transmission path, constructed on the basis of Digital Up Conversion (DUC)

  • Full duplex or half duplex modes*
  • Two independent receivers with panorama's bandwidths up to 312 kHz plus two sub-receivers

  • 4 HF antenna connectors and 2 VHF
  • Four separate programmable PTT outputs for external power amplifiers
  • ALC connector for external power amplifiers**
  • The ability to connect to VHF transverters
  • The ability to use the transceiver as a frequency measuring receiver
  • The ability to use the transceiver as a signal generator (DAC OUT)
  • Minor delay in CW mode (about 10 ms)
  • Ability to use the transceiver in SO2R mode
  • Remote control mode

* Full duplex mode is supported by the transceiver's hardware but is not implemented in the ExpertSDR2 software. It will be supported in the future ExpertSDR2 software releases.

** ALC functionality is supported by the transceiver's hardware but is not implemented in the ExpertSDR2 software. It will be supported in the future ExpertSDR2 software releases.


PC capabilities of your transceiver

  • Installation of digital modes software

  • Installation of HAM and Contest logs
  • Two CW Skimmers may be used on different bands
  • The transceiver can connect to the LAN and the Internet
  • Use of Internet applications (e.g. e-mail, Skype, ICQ, TV, etc.)
  • Play video and audio files
  • Watch TV via USB-receivers
  • Ability to connect two external monitors, keyboard, mouse


Application area 

  • Full-function radio amateur transceiver
  • Mobile contest-station
  • Remote receipt point for the contests and other applications
  • Spectrum analyzer with the bandwidth up to 80MHz
  • Work with the external programs of digital connection types, CW Skimmer, etc.

Block scheme

MB1 2


A version of ExpertSDR2 software with adapted GUI for 7" display was specially developed for the MB1 transceiver. At the present time software works in RX/TX mode and supports two independent receiving channels with the bandwidth up to 312 kHz. A DSP library developed by company Expert Electronics allowed improvement of receiving quality and higher the stability of the software.

MB1 supplied accessories

The transceiver may have an additional option: Automatic Tuner Unit (ATU) for impedance matching antennas with 50 Ohm output path of the transceiver.

Basic configuration:

  • MB1 transceiver

Note: ATU is not installed in the transceiver in the Basic configuration

  • PTT-microphone MD15

  • Power Supply Cable to connect the transceiver to an AC mains network
  • Backup fuse 5A

Maximum configuration:

  • MB1 transceiver+ATU

Note: ATU is installed in the transceiver in Maximum configuration

  • PTT-microphone MD15
  • Power Supply Cable to connect the transceiver to an AC mains network
  • Backup fuse 5A

Additional equipment:

Additionally, you can purchase following devices:

  • Computer Headset with electret microphone
  • PTT footswitch
  • E-Coder panel or E-Coder mini kit for convenient remote work



Design concept of the receive path Direct Digital Conversion
RF ADC clock frequency, MHz 160
RF ADC resolution, bit 16
RX frequency range, MHz 0.09 ... 65; 95 ... 148
The maximum width of the spectrum display, MHz 80
Amount of independent RX channels 2
Blocking Dynamic Range (BDR), dB 129
Dynamic Range over IMD3, dB >100
Reciprocal Mixing Dynamic Range (2 kHz), dB >110
MDS level, dBm -124
Image channel rejection, dB > 110
Local oscillator stability, ppm +/- 0.5
Built-in preamplifier, dB -20, -10, 0, +10
Additional VHF preamplifier, dB +22



The method of signal generation Digital Up Conversion
RF DAC clock frequency, MHz 640
RF DAC resolution, bit 14
The range of transmission frequencies, m 160, 80, 40, 30, 20, 17, 15, 12, 10, 6, 2
Maximum output power in HF, W 100
Maximum output power in VHF, W 50
Maximum output power in 6M, W 50


Other characteristics

Power voltage range, V, Hz ~100 ... 240, 50 ... 60
Maximum consumption power, W 320
Operating temperature, °C 0 ... +50
Dimensions L x W x H, mm (inches) 285 x 325 x 150 (11,2 x 12,8 x 5,9)
Weight, kg (lbs) 9.3 (20.5)


Internal PC parameters

Motherboard GIGABYTE MDH11KI on Intel® H110 Express Chipset
CPU Intel® Core™ i5-6400T Processor (6M Cache, up to 2.80 GHz) Intel® HD Graphics 530
RAM 8GB SoDDR4 - UMAX DDR4 2400 1024x8
SSD 120GB size-type M2

- 4 x USB 3.0 on the rear panel and 2 x USB 2.0 on the front panel
- HDMI and DPORT for external monitors
- LAN connector 1Gb
- COM-port


Specifications are subject to change without notice or obligation and specifications are only guaranteed within the amateur radio bands.



Additional High Pass Filter (HPF) for VHF with pass frequency 100 MHz.



HPF can be easily installed inside the transceiver.













pdf Terms of the products warranty

pdf MB1 User Manual 1.2.0

This document thoroughly describes MB1 functionality and characteristics. 11-07-18

User Manual Addendum version 5, by Erik EI4KF

September 2018

pdf ExpertSDR2 and CW Skimmer

This guide describes how to setup ExpertSDR2 and CW Skimmer(s).

pdf MB1 to Expert 2K connection diagram

pdf MB1 to HLV-1000 connection diagram

pdf Using the transceiver for SO2V operation with SDC

The diagram can be used for creating two working places with a single MB1 transceiver.