I was reading an article in the Danish hamradio magazine about a 1.8 MHz to 70 MHz SDR transceiver. In particular the RF frontend caught my attention because a set of band pass filters and a pre-amp would be a very useful companion for the USRP+LFRX, as would a power amplifier and a set of low pass filters be for the LFTX.
Arduino – The Documentary (2010)
We have been waiting for it and now it is here: An independent documentary about the Arduino project and the people behind it. You can even download the video in HD format from Vimeo. Arduino The Documentary (2010) English HD from gnd on Vimeo.
Replace Shotwell with F-spot as default editor
As you may already know, Ubuntu 10.10 ditched F-spot as default photo organizer in favor of Shotwell. Now, Shotwell may be a better photo organizer than F-spot – I can’t comment on that since I do not use any of these apps for organizing – it does have at least one very significant flaw that … Read more
Lunar eclipse and my new camera
I got up early this morning to watch the lunar eclipse. In Denmark only partial eclipse was visible since the moon went down already at around 7:40 UTC where I live. Unfortunately, it was cloudy so I didn’t even see the partial eclipse. Too bad because it seems that my new Fuji HS10 camera with … Read more
Getting into space when you’re broke
A very interesting and inspirational talk given by Kristian von Bengtson of Copenhagen Suborbitals at TEDx Copenghagen on November 30, 2010.
GQRX updates
I have had some time to hack on the GQRX receiver – my experimental AM/FM/SSB receiver implemented in Python (GNU Radio) and qith Qt GUI. Most notably, I have implemented audio recording, playback and squelch.
USRP E100 Now on Sale!
I woke up at 4 AM last night and couldn’t fall into sleep right away, so I got up and started reading emails. To my great surprise there was an email from Matt Ettus announcing the availability of the USRP E100 in mid December. The E100 here is according to the new naming convention used by Ettus: E=embedded, 1=first generation, 00=revision number – or something like that. So it is indeed the Embedded USRP I wrote about in July, which back then was based on some info I picked up on another mailing list and a press release.
The Universal Hardware Driver (UHD) working!
Just a quick note that I have successfully installed the Universal Hardware Driver (UHD) for the USRP. The UHD is the next generation hardware driver for the USRP family hardware from Ettus Research and it provides better hardware abstraction and portability as the current drivers. I already tried to make the switch few weeks ago … Read more
Interference on HO-68 linear transponder
Wednesday, November 10, Pete MI3EPN reported that he heard what sounded like FM transmissions on the lower end of the HO-68 / XW-1 linear transponder and it didn’t sound like ham radio operators making contact over a satellite. It was an interesting coincidence because I could remember that I have seen some FM-like signals while I was recording HO-68 on Tuesday evening but I thought it was some local interference.
Qt GUI working on Mac OS X
Thanks to a tip from @blackthorne I have the gr-qtgui component of GNU Radio working on Mac OS X Snow Leopard as well. As reported earlier, previous installations worked well except the Qt GUI part which gave errors like the one reported in my email.