Icom: RaspberryPi-based Portable IF-Recorder

DVE

Newbie
Joined
Dec 10, 2018
Messages
15
Location
Amsterdam, Netherlands
Hi all,

I did this stuff for my Icom-705, when I've found that the internal recorder can make only 8000 kHz sample rate WAV files, that is absolutely not enough for many digital signals, and even for AM-stations. I am interested in SWL and signals analyse, and it was a bit of disappointment. So I created software for the Raspberry Pi, that I can plug with a transceiver and use "in the field". Both sound and frequency are automatically synchronised, and as the output, we get IF files, that can be played in HDSDR or any similar software.

How it looks:
1603995337493.png

Recording can be controlled via TFT or in headless mode, via the smartphone.

Some recordings from IC-705 and a balcony antenna AOR SA7000:
https://www.dropbox.com/s/pn21w4qf1fbn0e7/IC-705_20201025_194522Z_738kHz_AF.wav?dl=1 - AM broadcast
https://www.dropbox.com/s/g45n1atqcpnpppv/IC-705_20201025_195515Z_6205kHz_AF.wav?dl=1 - DRM, can be opened by Dream directly
https://www.dropbox.com/s/hk27z89a4a4xl9c/IC-705_20201025_194829Z_14278kHz_AF.wav?dl=1 - 20M ham radio band
https://www.dropbox.com/s/6lzvtovxh7nfpko/IC-705_20201028_210809Z_3529kHz_AF.wav?dl=1 - 80M band

In theory, app should work with IC-705 (tested), IC-7300 and IC-9700 (not tested), and maybe other transceivers, that support USB audio output.

This is bandwidth, we can get, and it's much better than 8000 KHz sample rate WAV, provided by internal recorder:

1603995576995.png

1603995618242.png

If somebody is interested, sources are available: dmitryelj/RPi-HamRadioRecorder

More info about install process I'll add later.
 

tweiss3

Member
Premium Subscriber
Joined
Apr 24, 2020
Messages
134
Location
Ohio
You are right, the IF recorder is a much nicer recording.
 
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