Search found 21 matches

by W1ABA
Mon Jul 09, 2018 2:03 am
Forum: RTL-SDR Discussion
Topic: need to relocate RTL-SDR away from computer
Replies: 6
Views: 3329

Re: need to relocate RTL-SDR away from computer

Hi Cecil, It might seem logical, but I am trying to avoid the coax solution because I'd like to avoid an antenna mounted LNA if possible. The LNA cannot be broadbanded, so it prevents me from using the RTL-SDR on other frequencies. And, my purpose is to chase aircraft band DX, so being able to hear ...
by W1ABA
Sun Jul 08, 2018 11:49 pm
Forum: RTL-SDR Discussion
Topic: need to relocate RTL-SDR away from computer
Replies: 6
Views: 3329

need to relocate RTL-SDR away from computer

Hi All, I discovered, the hard way, that having a quarter wave antenna on the RTL-SDR doesn't work-the computer makes to much rf noise. So, I need to relocate the RTL-SDR away from the computer....actually I could relocate the antenna-but coax is expensive and lossy in terms of being able to copy we...
by W1ABA
Sun Jul 08, 2018 11:25 pm
Forum: RTL-SDR Discussion
Topic: SDR# scanner plugin
Replies: 6
Views: 5752

Re: SDR# scanner plugin

IC! I can't imagine the time to lock the clock multiplier PLL's would allow scanning at any decent rate. I have experience with clock multiplier based local oscillators connected to rotary encoders, allowing the user to 'tune' using the hand instead of the mouse. Even for frequency excursions of a f...
by W1ABA
Sun Jul 08, 2018 11:17 pm
Forum: RTL-SDR Discussion
Topic: Unidentified chip replacing the R820T2
Replies: 5
Views: 3606

Re: Unidentified chip replacing the R820T2

RTLSDRBLOG et al, Not releasing the schematic does squat::> The Chinese skim parts they manufacture for customers, customers who have GIVEN all the technical knowledge to manufacture and build the end product. The only way to be safe is to build the products in the US, which of course costs more::> ...
by W1ABA
Sun Jul 08, 2018 11:04 pm
Forum: RTL-SDR Discussion
Topic: Schematic for RTL-SDR V3
Replies: 7
Views: 5003

Re: Schematic for RTL-SDR V3

I believe 5v and 3.3 volts are needed, and I thought I saw power conversion inductors on the PCB-so I assumed that those inductors were attached to switching supplies. And, I thought I heard some chatter about the need to relocate them in order to improve the receivers sensitivity? Perhaps I was mis...
by W1ABA
Sat Jul 07, 2018 4:44 am
Forum: Troubleshooting Help
Topic: ubuntu 16.04 and gnu radio: only noise
Replies: 3
Views: 5225

Re: ubuntu 16.04 and gnu radio: only noise

Unless you really need GNU radio for development work or advanced functions, I suggest you use gqrx. Without following any of the instructions that come with your RTL-SDR, make sure you have the universe and multiverse repositories enabled and use Synaptic to install gqrx. It will download all the d...
by W1ABA
Sat Jul 07, 2018 4:29 am
Forum: Troubleshooting Help
Topic: sdr rtl wirelles
Replies: 2
Views: 1569

Re: sdr rtl wirelles

My translation is that the OP wants suggestions for eliminating the coax run by using a wireless (full duplex) transceiver to transfer digital data that would normally be sent over the usb cable. This is also an area of interest for me, I have a 100 foot tower, with power available for an RTL-SDR in...
by W1ABA
Sat Jul 07, 2018 4:06 am
Forum: Troubleshooting Help
Topic: New R820T2 Dongle Suddenly Unrecognized
Replies: 4
Views: 2491

Re: New R820T2 Dongle Suddenly Unrecognized

Is there any chance your windows punchbox did an OS update? These can wipe out drivers that you added manually.

1ABA
by W1ABA
Sat Jul 07, 2018 4:04 am
Forum: Troubleshooting Help
Topic: Spectrum Display Noise Floor Randomly Lowers
Replies: 6
Views: 3298

Re: Spectrum Display Noise Floor Randomly Lowers

You are seeing proof, right before your eyes that the RTL-SDR is overloading. It can happen in the tuner as the result of marginal mixer operation or in the A to D converter (when it's maximum total power input is exceeded). With the RTL-SDR's 40 db dynamic range and lack of tuned input filters, it ...
by W1ABA
Sat Jul 07, 2018 3:18 am
Forum: Off-Topic
Topic: NSA Tracking of powered down cellphones and other wireless devices
Replies: 7
Views: 21067

Re: NSA Tracking of powered down cellphones and other wireless devices

Keep in mind that the NSA mandates that OEM's include backdoors in most devices, whether they be hardware or software. Snoden is your friend, check out some of his releases::> Linux is managed and distributed outside US jurisdiction, which makes inclusion of software in the operating system more dif...