Hi folks, I've just spent a couple days reading a lot in here. Finding this thread, a recent one, talking ham radio gives me an excellent opportunity to join in - my first post here.
I'm in the process of putting together receive & transmit capability based on gnuradio. Not a transceiver exactly, but a full station from soup to nuts. Currently I'm receive-only using a Ham-It-Up converter, an rtlsdr dongle, Gqrx and a newly constructed mag loop antenna. My plans include generating SSB via gnuradio and bringing the I & Q signals out to homebrew balanced modulators, a DDS and a QRP linear. I was a ham back in 1955-60, let my license lapse & was inactive for several decades, then just last summer went & got my General. Returning to the hobby now I find radio just as magical & exciting as when I was a kid. Since I prefer homebrewing & gadgeteering more than operating on air, I'm building stuff on the cheap like I did back then but now it's $20 rtl dongles instead of WWII surplus ARC-5 command sets. Still chewing gum & rubber bands tho. Actually I may get involved with grc/gnuradio before I tackle making a transmitter. What brought me to this list was pursuing articles on folks using two or more rtlsdr dongles for phasing applications. My interests aren't so much in passive radar or beamforming. I'm sticking with HF bands for now (mainly 40 meters). I've been researching two-antenna phase cancellation techniques for RFI noise reduction. Hams have been doing this with antenna-level RF signals for years. A currently available product is the MFJ-1026. But I got to thinking about doing the nulling at the IQ signal level via twin receivers, i.e. dual dongles. Coherent clocking. Much discussion I've read involves precision measurements but my use case is, I believe, much more modest. All I'm looking for is letting a 2nd noise antenna reduce the receive noise floor on an HF ham band. Anyway, I'm interested in giving this a try. One more thing: I'm already helping to spread the word about gnuradio. The graphic art at the top of my YouTube channel has a grc flowgraph along with other radio items both old & new. I'm working on telling my story about building up my station via YouTube videos (only a couple up there right now). If the "diversity" noise cancellation scheme works out that'll be another video. Tim KK6VQQ YouTube channel: www.youtube.com/channel/UCCRh9a5sQKd5h8VAfZ_OtWA -- View this message in context: http://gnuradio.4.n7.nabble.com/SSB-CW-FM-tranceiver-tp56800p57121.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
