Some devices that can mount optional 9MHz filters are listed in the table.
A first test with a balcony homebrew antenna (picture) and an IC706MKiiG allowed me to receive bitXpress banner on 15.896 MHz and listen to Deutsche Welle on 6MHz broadcast band. I used the free "DReaM" software on Windows.
The same downconverter can also be used with SDRadio (www.sdradio.org, without sideband rejection) in order to accomplish narrowband filtering, or SSB/CW/FM demodulation for some receivers (such as IC-725/728 that require a costly hard-to-find optional unit for FM reception).
Side-by-side comparison with 455-12 DRM converters showed equal performances.
Each downconverter is homebrewed (either dead-bug or usually on a veroboard) and is shipped with connecting cables to RX/RTX filter
plug and soundcard input. It requires a 9V battery (not included). The converter is sold assembled, tested and not boxed. An article featuring the complete project has been published on the Italian magazine RadioKit Elettronica in September 2006.
Please contact me at 
for more information.
Since I have received some requests of the diagram, at the bottom of the page you find the circuit of a simple DRM converter for ICOM Receiver chains. Please note that this is not the complete diagram, but an adaptation of what shown on QST October 2003 by WB8IMY.
| Model | 9 MHz Opt. Filter type | Notes |
| IC-706 IC-706MK IC-706MKiiG |
plug |  |
| IC-725 IC-726 IC-728 IC-729 |
plug | |
| IC-720a | solder | - |
| IC-735 | plug | - |
| IC-R70 | cut and solder | |
| IC-R71 | plug | - |
| IC-R75 | plug | also allows 455 kHz I.F. converters |
| IC-761 | plug | also allows 455 kHz I.F. converters Has a spare jack on the rear panel |
| IC-7000 | NO | Does not use optional filters. No DRM with 7000. |
| IC-7400 | NO | Does not use optional filters. No DRM with 7400. |
| IC-R7000 IC-R8500 |
NO | this receiver has a 10.7MHz IF output connector. Cannot be used with standard version of this converter |
| IC-703 | NO | It looks like a QRP 706, but its receiver strip is totally different! Use a 455-12 converter. |
| IC-746 | plug | Also allows 455 kHz I.F. converters. |
| IC-746PRO | NO | RX chain is entirely DSP'ed. No (easy) DRM with 746PRO. |
| IC-xyz | ? | Feel free to ask if your Icom supports this converter! |
