ELAD SDR transceiver

FDM-DUO from Elad (Italy) New


A SDR transceiver with 5 W output that can operate as a stand-alone without a PC!

The small transceiver is equipped with the latest SDR technology: A fast analog-digital-converter samples the received HF directly into digital signals and a downstream DSP module provides for filtering and processing. Another ARM processor handles the signals of the control unit.

One highlight of the FDM-DUO is the possibility to use it standalone without a computer also. Then, this transceiver is a perfect companion for the QRP fan, so that you can have a modern SDR with you even on holidays. The controls are very easy to use for a portable QRP transceiver. In addition to a big VFO knob there are two smaller knobs for volume and filter-center/width (amongst others). Six buttons below the well readable LC-display access the most important functions directly. Less frequently used settings are available via menu system.

Connected to a PC, FDM-DUO is a very modern SDR receiver and transmitter with capabilities which are usually available in very large large radios only.

The device receives from 10 kHz to 54 MHz. A 16-bit ADC with 122 MHz sampling rate is built-in. Receive modes are: SSB, CW, AM (incl. Sync-AM), FM, WFM (incl. Stereo and RDS!), RTTY and DRM. The transmitter has 5 W output power, alternatively a HF output jack with 0 dBm output.

Together with a computer the possibilities for the FDM-DUO are extended quite considerably of course. Three(!) USB 2.0 interfaces offer a wide range of possibilities. One interfaces works as a CAT controller, another one provides digital I/Q data for the waterfall diagram, and the third USB port serves as a external sound card for the PC! This way the FDM-DUO can be used for digital modes such as RTTY, PSK31 etc. By distributing these functions to three separate USB interfaces the handling for the user is made much easier, in most cases no additional USB drivers are required.

The FDM-DUO has two configurable antenna jacks: RX/TX on the same jack, or RX and TX on one jack each.

Frequency Range RX 9 kHz - 52 MHz RX direct sampling
Frequency Range Tx only amateur bands 160 to 6m
Output power 5 W on amateur bands or 0 dBm HF-Output
Connectors 2x antenna jacks PL (RX/TX or separate RX/TX)
Exciter Output 0dBm, 100 kHz - 54 MHz
Frequency Oscillator TCXO 10MHz
Frequency stability FIXME
Stand-alone modes (w/o PC) CW, USB, LSB, AM, FM
CAT USB interface with FTDI controller
Weight 1200g
Size incl. controls 180 × 155 × 70 mm

  • Included in the shipment of the FDM-DUO is:
  • 3 × USB A/B cable
  • 1 × USB adaptor to USB Micro-B
  • 2 × Audio cable stereo 3.5 mm phone plug
  • 1 × Audio extension cable stereo 3.5 mm phone plug
  • 1 × DC power cable with connector, other side open
  • 1 × 9 pin D-Sub plug
  • 1 × USB stick with FDM-SW2 Software, handbooks in english and italian (PDF)
  • 1 × Hand microphone, Electret type, RJ-45 connector, Icom compatible
  • 1 × Quick Start Guide
Order No.
FDM-DUO Elad SDR Transceiver FDM-DUO, black case 1159.00 € Buy now In stock, shipped in 1 or two days.
FDM-DUO-RED Elad SDR Transceiver FDM-DUO, red case 1199.00 € Buy now In stock, shipped in 1 or two days.
Info freight charges
In the ELAD FDM-DUO Download Area you will find:
  • FDM-DUO english and italian user manual
  • FDM-DUO Information flyer
  • FDM-DUO Firmware Updates
  • FDM-DUO USB drivers

FDM-DUO CW Demo Video

A customer asked us about the behaviour of the FDM-DUO in telegraphy when transmitting, especially about a possible latency when keying and the noise of the transmit relay. We took the opportunity to produce this simple video.

Obviously the microphone of the camera (in 20cm distance) is very sensitive in that audio range, so the click of the transmit relay is more present than it actually is. In reality the click is not disturbing at all, it is not louder than with other transceivers in this size. There was no discernible latency when keying the radio, noot even in Full BK. Perhaps the AGC setting could be improved for Full BK.