Tuesday, 29 May 2012
Here are some screen shots of my homebrew digital interface working. I am running the Ham Radio Deluxe Digital Master 780 software which provides lots of handy functions. The waterfall display and macro options are far better than similar software I have used. As you can see, I have configured the application to send CQ on the 17m band. On the waterfall you will see that I have chosen a low noise area of the band and well away from the strong signal which is left of centre.
Tuesday, 22 May 2012
The September 2010 addition of the RSGB RadCom magazine, has a simple project for a USB digital modes interface. You can purchase back issues of this magazine from the RSGB website. The article was written by Dave, M5TXJ, and some follow-up information is available on his website HERE. I can’t reproduce the article on this blog due to copyright but here are some images of my construction of this project. I made the PCB myself by printing the tracks using a laser printer and then ironing it on to a thoroughly cleaned copper clad board. I bought some acid crystals from Maplin and made up the evil concoction in my shed. The etching process took about fifteen minutes.
Monday, 21 May 2012
My first self-build project was a dummy load. I collected various circuit diagrams and reviewed various designs but shown below it the one I went with. The box came from Maplin and the remaining components from Farnell and my junk box.
Friday, 18 May 2012
As I’m hoping to go mobile in the near future, I thought it would be a good idea that I buy a suitable SWR meter. I wanted one that would cover both low and high frequencies. The one I went for was the Avair AV-601. I’ve only just unboxed it so once I can find or make a patch lead, I’ll be trying it out. First impressions are that it is well made with no sharp edges or cheap plastic trim. It would have been nice to have had N-Type connectors for the VHF sockets as I’ll have to use a converter. Here is a picture of the new device.