Search found 174 matches

by alanzfq
Fri Jul 31, 2020 7:35 am
Forum: RTL-SDR Discussion
Topic: RTL-SDR for Iridium
Replies: 6
Views: 1788

Re: RTL-SDR for Iridium

Thanks, until Ben asked I'd not thought of trying these little puck antennas for seeing satellites.
All my RTLs are old ones with an external bias T and so far I've not managed to use one successfully. The Funcube dongle and Pluto shows them, I've not tried any decoding software yet.
Alan
by alanzfq
Tue Jul 28, 2020 2:12 pm
Forum: RTL-SDR Discussion
Topic: SDR # Set samplerate error
Replies: 5
Views: 3281

Re: SDR # Set samplerate error

As suggested it's a USB fault.
Try a different socket or even a powered hub.
Alan
by alanzfq
Mon Jul 27, 2020 7:40 am
Forum: RTL-SDR Discussion
Topic: RTL-SDR for Iridium
Replies: 6
Views: 1788

Re: RTL-SDR for Iridium

I found not all GPS antennas pickup Iridium. A good one, far better SNR shown an a GPS program, did not pickup Iridium. It was far better for GPS satellites but must have had a good filter preventing out of band signal reception. I also tried 3 RTLs and did not manage to receive anything. I guess th...
by alanzfq
Sat Jul 25, 2020 8:38 am
Forum: RTL-SDR Discussion
Topic: RTL-SDR for Iridium
Replies: 6
Views: 1788

Re: RTL-SDR for Iridium

Is this Iridium?
FCD and ordinary GPS antenna no plate.
by alanzfq
Sat Jul 25, 2020 6:36 am
Forum: RTL-SDR Discussion
Topic: RTL-SDR for Iridium
Replies: 6
Views: 1788

Re: RTL-SDR for Iridium

A plate is likely to improve reception particularly as it is specified as part of the antenna system.
It's dimensions are not likely to be too critical, just as big as possible. A car roof or anything like that?
Alan
by alanzfq
Fri Jul 24, 2020 8:11 am
Forum: RTL-SDR Discussion
Topic: Upgrade path from Msi.SDR
Replies: 1
Views: 630

Re: Upgrade path from Msi.SDR

A quick search shows this to be a SDR Play "clone" except it is not a true clone, does not work anything like as well. Look at the true SDR Play, check as many reviews as you can, they seem to be well respected but not so cheap. Also wide bandwidth done well is expensive, I do not know if the MAC re...
by alanzfq
Mon Jul 20, 2020 2:34 pm
Forum: RTL-SDR Discussion
Topic: GPS to Glonass transition with RTL SDR
Replies: 10
Views: 3161

Re: GPS to Glonass transition with RTL SDR

Susan,
Your links reinforce my respect for the little chip that all modern GPS modules use! Receiver, counter, calculator doing things I can scarcely imagine let alone understand.
I'd have even more respect for someone who could reproduce what it does!
Alan
by alanzfq
Mon Jul 20, 2020 8:28 am
Forum: RTL-SDR Discussion
Topic: Basic mobile set-up for AM radio
Replies: 1
Views: 902

Re: Basic mobile set-up for AM radio

Dan, Why not a small MW portable with a ferrite rod incorporated? Or a wire could be coupled to the rod if signals were weak by making a few turns round it. Possibly just round the radio? I'd think anything other than a wire antenna would be impractical when hiking. A RTL v3 should work with a wire,...
by alanzfq
Fri Jul 17, 2020 7:46 am
Forum: RTL-SDR Discussion
Topic: GPS to Glonass transition with RTL SDR
Replies: 10
Views: 3161

Re: GPS to Glonass transition with RTL SDR

And if you look at the spread spectrum frequency range covered by the satellites (I guess you have not!) the RTL is completely useless.
by alanzfq
Fri Jul 17, 2020 7:21 am
Forum: RTL-SDR Discussion
Topic: GPS to Glonass transition with RTL SDR
Replies: 10
Views: 3161

Re: GPS to Glonass transition with RTL SDR

I cannot imagine any way that it would help in any sort of conversion.
It might help if you designed a completely new system using a RTL as receiver and other chips for processing.
To me it seems a very difficult project especially when it can be done by a cheap Ebay module.
Alan