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Amateur Radio Projects and Software Defined Radio

Rumlog 7300 Scope Feature Demo

If you have an Apple Mac and an Icom IC-7300, you may want to take a look at DL2RUM’s Rumlog NG software. Aside from being a very nice logging software package it offers a resize-able spectrum / waterfall scope that can fill your entire PC screen if you wish. This is a nice improvement over Icom’s RSBA-1 software that limits the display of the spectrum / waterfall when connected to an Icom IC-7300 to a fairly small area. The scope drawing performance is pretty similar to RSBA-1 due to the rather slow serial communication rate of 115200 baud. To get this working, you must download and install the Scilab VCP driver on your Mac and under Rumlog’s preference use the following settings for TX1:

Rumlog Settings







On the Icom IC-7300 got to Menu/Set/Connectors/CI-V/CI-V USB Port/ and set Unlink from [Remote]. While there set the CI-V Baud Rate to 115200. On Rumlog’s IC7300 control screen you should see a Show Scope button. If everything is working ok, you should have a the IC-7300 scope shown on your Mac’s screen.  There are several tweaks you can experiment with relating to the scope on the scope screen …

Best Holiday Gifts for the Radio Hobbyist for 2012

Well, it’s that time of year again where we pick the top radio related gifts for 2012. This year offered up some pretty interesting technologies related to the radio monitoring hobby and ham radio.  If you are looking for something this year to give yourself, ham radio friend or radio monitoring enthusiast here are a few suggestions. Ham Radio Science has used or reviewed most of these products and found them to be pretty darn cool. The other great thing is that most of these items are fairly inexpensive, which is a nice  for a change. Here are our top picks for the 2012 Holiday Season.…

New Alinco DJ-X11 Firmware Update Out

One of our readers gave me a heads up (Thanks Mark!) that version 2.60 firmware update is now out for the Alinco DJ-X11 is now out. As far as what it does is pretty cryptic. The descriptions says “Three minor bugs fixed. (Squelch level changes after Flash-tune, Programmed-scanning / band-transition parameter relation and a small inconvenience in display)” Maybe someone will know what those issues were. I tried to update my DJ-X11 and had very little success. The problem is that when I start the firmware update program, I get an error message that says something to the effect that MSCOMCTL.OCX is not registered. This is very similar to the problem that we ran into with the control software problem that was mentioned in an earlier article here. Apparently, Alincos software must be developed on a Windows 98 platform.  If you are running anything newer  than 98, you may very well run into this issue. If anyone has any luck with it, let us know!

The firmware can be found at Alincos Website.

Discuss on Alinco DJ-X11 Forum

Control PowerSDR with the Hercules DJ Control MP3 E2


If you have been reading Ham Radio Science, you will notice that a lot of the articles featured here are about taking existing technology and applying them to Amateur Radio. Rather than reinvent the wheel, why not take an existing technology and get a little more mileage out of it. This is something Amateur Radio operators are good at, as well as coming up with completely new technology. Amateur Radio operators are known for their ability to find new ways to use stuff just laying around to benefit their hobby. Nowadays, we have a lot of technology laying around, so why not finding ways of recycling it for Amateur Radio use. Thats just what Tobias, DH1TW did with marrying an off the shelf midi controller with PowerSDR. Utilizing Midi as a control language maybe a little to foreign to Radio Amateurs unless you also happen to be a musician. Midi has been utilized for many years as an interface language between electronic instruments, sound modules, and computers. Midi controllers can come with a wide variety buttons, knobs, and sliders for controlling PC music processing programs. So why not use these as input devices to Amateur Radio software?  The biggest …