Search found 13 matches

by 9a4qv
Thu Nov 23, 2017 11:11 am
Forum: User Projects
Topic: Pluto xmit used as LO for mixer ??
Replies: 6
Views: 4953

Re: Pluto xmit used as LO for mixer ??

Just to update the findings, thanks to Tim I manage to get the full power ADALM can deliver and it is possible to use the ADALM TX port for the downconverter LO.

thanks guys,
Adam
by 9a4qv
Sun Nov 19, 2017 6:49 pm
Forum: User Projects
Topic: Pluto xmit used as LO for mixer ??
Replies: 6
Views: 4953

Re: Pluto xmit used as LO for mixer ??

Just fyi, I have successfully used a MiniCircuits ZX05-153 mixer using the Plutosdr xmitter output set to 6 Ghz to act as the LO and on the test bench synthesizer have viewed 10.98ghz signal on SDR#. I used the iio-oscilloscope app to program up the 6GHZ xmit signal. Can you explain how did you do ...
by 9a4qv
Sun Jul 16, 2017 9:36 am
Forum: RTL-SDR Discussion
Topic: RTL-SDR Broadcast AM Block High Pass Filter Not Working?
Replies: 4
Views: 4129

Re: RTL-SDR Broadcast AM Block High Pass Filter Not Working?

Can you tray the same just using one filter only, so without FM block filter.
by 9a4qv
Sun Mar 26, 2017 7:33 pm
Forum: RTL-SDR Discussion
Topic: LNA-FMBANDSTOP-RTLSDR
Replies: 9
Views: 5605

Re: LNA-FMBANDSTOP-RTLSDR

I can not tell by your nick if you order the LNA4ALL with or without Bias-T. Version with Bias-t is 23 Euro plus shipping so you can calculate what LNA you have purchased. I would not run such a long USB cable with the repeater. Run the coaxial cable instead. Place the filter and the LNA close to th...
by 9a4qv
Sun Mar 26, 2017 3:35 pm
Forum: RTL-SDR Discussion
Topic: LNA-FMBANDSTOP-RTLSDR
Replies: 9
Views: 5605

Re: LNA-FMBANDSTOP-RTLSDR

As mentioned, it depend on the FM bandstop filter design. The filter can pass the DC but it will be better to insert the filter between the antenna and the LNA input. Inseriton losses of such filters are not big, they will not effect the noise figure. On the other side it will protect not only the d...
by 9a4qv
Sat Mar 25, 2017 5:39 pm
Forum: User Projects
Topic: Recieving signal from any flyby satellite
Replies: 5
Views: 5718

Re: Recieving signal from any flyby satellite

The NOAA birds are not the best option for your experiment due to multiple carriers and wide signal. The better option is to monitor the HAM satellites, LEO where the narrow signal from the beacon they are transmitting can be monitored for the dopler. You can record the complete pass using the SDR# ...
by 9a4qv
Fri May 20, 2016 8:22 am
Forum: User Projects
Topic: Boot Key Cruisers Net on the Net
Replies: 13
Views: 37195

Re: Boot Key Cruisers Net on the Net

I did not mean to put the streaming station on the boat. The main receiver that will stream the traffic to the web should be on the coast somewhere with a good coverage and good internet connection. It can run 24/7 but it can run only during the Net to save the bandwidth and cost if not on the flat ...
by 9a4qv
Tue May 17, 2016 10:15 pm
Forum: User Projects
Topic: Boot Key Cruisers Net on the Net
Replies: 13
Views: 37195

Re: Boot Key Cruisers Net on the Net

I would like to propose a bit different approach and already software supported. Why not using the WEB SDR approach: http://websdr.org/ It runs on Linux, ask the author for the SW. Setup and run. This way you just stream the data to the web and the stations are logging on to receiver/channel (live)....
by 9a4qv
Fri Apr 08, 2016 1:28 pm
Forum: RTL-SDR Discussion
Topic: WiFi with SDR at 470 MHz
Replies: 1
Views: 3567

Re: WiFi with SDR at 470 MHz

It can work, but you will spoil all the 470MHz (and around) band. What is the bandwith of the single channel in the Wi-Fi ? If you center that bandwith to 470Mhz your signal will be probably out of the boundaries for the 470Mhz band. You have to count that your signal will interfere with the all oth...
by 9a4qv
Thu Apr 07, 2016 10:38 pm
Forum: RTL-SDR Discussion
Topic: using RTL-SDR onboard an aircraft
Replies: 3
Views: 6231

Re: using RTL-SDR onboard an aircraft

Why not taking another approach, when you board the aircraft try to ask the chief steward and explain what you are doing/planing to do. If there is relaxed crew/pilot and enough time, they may even show you the pilot cabin and you can have a chat with them explaining what your hobby is about. What y...