Search found 51 matches

by Aussie Susan
Wed Feb 06, 2019 1:44 am
Forum: RTL-SDR Discussion
Topic: rtl_fm for broadcast am radio
Replies: 2
Views: 12583

Re: rtl_fm for broadcast am radio

The 'man' page that was the first result of a Google search shows that the '-M am' command line option is experimental. It could well be that it is not working on the version you are using. Also are you selecting the correct frequency? Most of the broadcast AM stations I know are in the 500KHz to 1....
by Aussie Susan
Fri Jan 18, 2019 2:15 am
Forum: RTL-SDR Discussion
Topic: Interface Defination For the RTL-SDR Stick
Replies: 1
Views: 8973

Re: Interface Defination For the RTL-SDR Stick

From memory (when I tried to look for such information) they are a real mess.
You could use rtl-tcp and talk to it as a '.local' networked device. Also look at some of the source code for other rtl-xxx programs and see how they do it.
Susan
by Aussie Susan
Fri Jan 11, 2019 2:12 am
Forum: User Projects
Topic: Newbie question on demodulation
Replies: 2
Views: 14757

Re: Newbie question on demodulation

Your best bet might be to install GNU Radio and use the various demodulation blocks in there. Various programs contain demodulation modules but, unless they are open source, will generally only be available in binary form. However, if a program contains the demodulation that you require, you could b...
by Aussie Susan
Wed Nov 28, 2018 1:24 am
Forum: Troubleshooting Help
Topic: Very weak singnal from NOAA with QFH anthenna
Replies: 15
Views: 14762

Re: Very weak singnal from NOAA with QFH anthenna

In the past I made a QFH according to the instructions at http://www.g4ilo.com/qfh.html and it worked well. I mention this here as it includes a diagram and description of how to connect the wires at the top. There are also lots of other example on the Internet of how to construct (and wire) a QFH a...
by Aussie Susan
Wed Aug 08, 2018 2:56 am
Forum: Antennas
Topic: HF Antenna for balcony
Replies: 10
Views: 35570

Re: HF Antenna for balcony

With a Mag Loop antenna, just be aware that you will need to tune them as you change frequency as they have a very high Q. If the antenna is on the balcony and you are operating from inside, this might be an issue. This is certainly true for Tx (which I know you are not talking about) but it can be ...
by Aussie Susan
Mon Jul 30, 2018 3:00 am
Forum: Antennas
Topic: HF Antenna for balcony
Replies: 10
Views: 35570

Re: HF Antenna for balcony

Tx and/or Rx?
Are there specific bands you are interested in or general DX?
What is the budget?
What is the radio you are connected to? (not really important but helps understand some of the above)
Susan
by Aussie Susan
Thu Jun 21, 2018 3:03 am
Forum: RTL-SDR Discussion
Topic: can't download WxtoIMG
Replies: 7
Views: 7043

Re: can't download WxtoIMG

Also be aware that the developer would appear to have disappeared a number of years ago and is not responding to messages. The last time I saw the original page it had license keys on it (which seemed to indicate the owner was making the project free to use the full version) but these stopped workin...
by Aussie Susan
Mon May 14, 2018 3:30 am
Forum: RTL-SDR Discussion
Topic: custom 400-406 MHZ bandpass filter?
Replies: 3
Views: 3327

Re: custom 400-406 MHZ bandpass filter?

I agree with Username - that interfering signal is just too close for a filter up at those frequencies. Even a crystal resonator won't have the cut-off required. What you might be able to do is to use your SDR and shift the whole signal down the band so that the bandwidth of the radiosonde signal is...
by Aussie Susan
Thu Apr 12, 2018 4:05 am
Forum: Off-Topic
Topic: Are websdrs, spyservers etc... legal?
Replies: 9
Views: 10255

Re: Are websdrs, spyservers etc... legal?

Not just retransmit but pass on the information received in any way. Courts (including those in NZ as I recall from my time as an Ham radio operator there) have been known to take a very broad interpretation of terms such as 'reproduce' in the act when it suits them. Basically it assumes that all ra...
by Aussie Susan
Tue Apr 03, 2018 3:53 am
Forum: Troubleshooting Help
Topic: Shifted WXtoIMG images.
Replies: 3
Views: 4116

Re: Shifted WXtoIMG images.

Check out http://www.wxtoimg.com/support/wxfaq.html
There is a section in "Image Slant"
Susan