I have been quite busy during the last weeks doing overtime at work, nonetheless, I have managed to carry out some small on the air tests of my newly acquired WBX transceiver boards for the USRP and GNU Radio. Tonight, I tuned in to Copenhagen VOLMET that transmits AM on 127.000 MHz.
Radios
Articles and blogs about radio receivers and transmitters. Both commercial off the shelf radios and home made DIY experiments by Alexandru Csete OZ9AEC.
Quick check of the WBX receiver
I had a few hours to spare tonight and I decided to do a quick check of the WBX receiver. Didn’t have time for much so I just compared it to the TVRX tuner using a strong FM broadcast station. The software was a simple WFM receiver constructed in the GNU Radio Companion graphical editor. … Read more
The WBX 50-2200 MHz transceiver
It was a good day today. At long last, I have received my WBX transceiver boards for the USRP! I have been waiting for this transceiver board for quite some time now because I didn’t really have and transmit capabilities in the VHF and UHF bands. This board was expected to cover 50 MHz to … Read more
Live recording of receiver tests
Tonight I have been testing some ham radio transceiver code written in Python/GNU Radio. It is some student project published on SourceForge. You can find the code on the project page at Sourceforge: http://sourceforge.net/projects/sdr.
GNU Radio Live Webcasts
Chat is available on the Ustream channel page!
GNU Radio Projects
This page provides an overview of the various projects and experiments I am or have been doing with GNU Radio and the Universal Software Radio Peripheral (USRP). GNU Radio is a free, open source software development toolkit that provides the signal processing runtime and processing blocks to implement software defined radio. The USRP provides a … Read more
Improvised Shoulder Strap Holder
When I bought my FT-817 (second hand) it came with a shoulder strap but the shoulder strap holders were missing. I talked to the seller and he promised to send them to me. Few days later I have received another shoulder strap so that now I had two shoulder straps but still no holder! Now … Read more
GB0MPA commemorating the ship RMS Carpathia
I caught the special event station GB0MPA on the air yesterday. GB0MPA commemorates the ship RMS Carpathia (callsign: MPA) which saved 705 people from the Titanic in April 1912. GB0MPA is active for 28 days starting on Apr 4. On this video GB0MPA has contact with two stations from Romania – one of them west … Read more
Sparrow Overview
The Spatz (German Spatz) is a small monoband CW transceiver kit designed by DK1HE and distributed in kit form by the German QRP Project. Despite the small size and relative simplicity of the kit, the Spatz is a quite advanced transceiver featuring goodies like DDS with RIT/XIT, 8 pole Cohn Filter with 400Hz bandwith, AGC with high dynamic range, heavy duty PA, built-in keyer and full QSK. The kit can be bought with DDS ready built and tested and is available for the 80, 40, 30, 20 and 17 meter bands.
PBT Mod for the IC-765
As you may already know, the IC-765 has IF-shift but no passband tuning. There is, however, a simple mod originally designed by Gerd Henjes, W2ISB, which allows the IF-shift button to tune the passband while the IF-shit button is in OFF position. This mod is described in the VE3HUR IC-765 notes and reproduced here with some illustrative pictures, as well as a video demonstrating the difference between PBT and IF-shift