On Sat, Sep 25, 2010 at 8:38 AM, Davek <dave_k_...@yahoo.com> wrote: > Has anyone had Any success with amateur HF with the usrp? I would like to > purchase a basic rx and maybe a basic tx for monitoring the hf amateur bands. > I know i need lownoise amplifaction and filtering but not sure what to get. I > know i could just use the IF output of transciever, but im not sure if thats > what i wanna do. if anyone has setup something i would be curious to hear > about it thanks, > Dave
Hi Dave, I have had the USRP1 and LFRX connected to a Butternut HF2V antenna with 30m and 160m extensions using ~30 meters of RG213 coax. No preamp or filter or anything else, and I could hear lots of SSB/CW traffic (even DX) and AM broadcast. I have two video recordings: AM on medium waves: http://www.youtube.com/watch?v=317Iu6HRA0w Hamradio SSB/CW on 7MHz: http://www.youtube.com/watch?v=t1FEq6h7Z1c I have measured the sensitivity in CW to 3-4 microvolts so yeah, a preamp would be useful above 10 MHz. I think one can get these "acrtive whip antennas" for shortwaves, I guess the filter and preamp could be used with a real antenna. I have not tried the transmitter on the air. For sure that will need power amplifier and low pass filters! Alex _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio