Elad FDM-DUO SDR transceiver

My latest addition to my ham radio family is an Elad FDM-DUO SDR transceiver  which i got for a very good price at Permo .

They had it in black, silver and red (I have also seen it in camo), and I really loved the red color, so that’s what i bought.

The radio is a QRP radio, transmitting with a maximum of 5 watts, and can be used with a windows computer or as a stand alone.

Have a look at the specs:

Freqency range: 10KHz – 54MHz
Direct sampling receiver operating @ 122.88MHz ADC: LTC2165 16bit
DDC (Digital Down Converter) FPGA Xilinx Spartan.6 family down to 192Ksps
DDC, Filter & Demodulator ARM STM32F429 floating point microcontroller
Demodulation CW, LSB, USB, AM
LSB,USB Filters selectable 1600-3100Hz Bandwitdh with 100Hz step plus 4000-5000-6000 Hz Bandwitch
AM Filter selectable from 2500 to 6000Hz with 500Hz step
CW Filters 2600Hz-1500-1000-500-300-100Hz Bw plus 4 Cw peak filters applied after 100Hz Bw to obtain an overall filter of 20Hz Bw
Noise Reduction  10 levels
Noise Blanker 10 leves
VFO A, VFO B, 199 MEMORIES with Frequency/ Alphanumeric label visualization, programmable by FDM-SW2 memory manager
Programmable BAND selections: selectable up to  20 quick recallable memories from 180 to 199

DDS AD9957  with 368.64 MHz clock
Microphone input ADC 48KHz @16bit selectable gain -12dB to +12dB
Key and Paddle input for CW operation (Iambic A e Iambic B selectable)
5W min power output from 160m to 6m, 8 W typ output @14MHz
PTT Output connector to drive external amplifiers

All programmable components (ARM RX, ARM TX, Flash for FPGA, User Interface microcontroller and USB controller) are firmware upgradable
CAT input USB control interface with FTDI controller
Antenna connectors: RTX SO-239, RX SO-239
Monitor output: 0dBm SMA to be used as test equipment allow the use  as a Digital RF Generator
LCD Backlight RGB programmable, depending on function can change the colour (RX, TX , PC remote control)
10MHz Reference input connector: SMA
Power supply: 2.1mm DC Plug 13.8VDC RX consumption 500mA typ (13.8V) TX: tbd
Size: Witdh 180mm (7.00″) x Depth 155mm (6.10″) including Knob and connectors or 130mm (5.10″) only enclosure  x Height 70mm (2.75″)
Weight: 1.2Kg (2.4 lb), shipment package 2.2Kg (4.85 lb)

PC mode operation with FDM-SW2 software specifications
Up to 9 simultaneous receivers combination ( 1 on center frequency stand alone, 4 FDM-SW2 in fist 192kHz channel and 4 in the second 192kHz channel

Each receiver on FDM-SW2 have a dedicated Audio Channel and a dedicated CAT to be usable from external application with Visrtual serial ports and Virtual Audio Cables

Selectable Band configuration from 192kHz to 6MHz DDC bandwith  (192,384,768,1546,3072,6144Ksps) 2 channel 192Ksps, 2 channels 384Ksps

RX and TX SPLIT mode operation:  VFO A for RX while VFO B used for TX (with FDM-SW2 simple click operation to change TX frequency)

CW skimmer integration management (DX Spot visualization & tuning capability)

Direct digital Modulation using USB soundcard based on CMedia chipset digitally interfaced with ARM floating point microcontroller and DDS


2m WebSDR in Oslo

If anyone wants to listen to what goes on at the 2m amateur band in Oslo, they can try my WebSDR.

The WebSDR is a Raspberry Pi 3 with a NooElec NESDR SMArt and a Diamond X-30 antenna. The software is OpenWebRX by András Retzler, HA7ILM.


A few weeks ago, at Hammeting 2017, I bought a KiwiSDR from ChrisTech. A KiwiSDR is a software-defined radio covering 10kHz to 32Mhz (I have mine set to 30Mhz).

The KiwiSDR allows you connect to it over the Internet and listen to short wave transmissions through your web browser from anywhere in the world. Up to 4 users can listen simultaneously to any frequency in the 0-30Mhz range. Each user can tune independently.

I love this little gadget, and have played with it daily for a couple of weeks now, and are now looking for a remote (noiseless) QTH for it.

If you want to try it, you can click here.

Yaesu FT-817 ready to go

I love my Yaesu FT-817, and I bring it with me every chance I have.

I was sick and tired of dragging my FT-817 around loose in my backpack, so I decided to find a permanent solution.

I used a watertight suitcase, and cut the foam so my FT-817 with accessories coult fit. It took me 20 minutes, and the result became pretty good.

Now it’s easy to go out and bring my FT-817. It’s packed and ready in a watertight and shockproof suitcase, so I can just grab it and go  out.

I just have to remember to bring an antenna….