Search found 103 matches

by aurgathor
Sat Dec 21, 2019 10:26 am
Forum: Other SDR Devices
Topic: Airspy HF+ Discovery
Replies: 17
Views: 3580

Re: Airspy HF+ Discovery

I received mine, too. I only tried it on broadcast FM so far, and it's definitely better than my RTL-SDR. Of course for an over 7x price it's better be better.

I wanted to see if there is a separate LNA inside, but peeking under the hood is not easy.
by aurgathor
Thu Dec 19, 2019 6:03 am
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 35
Views: 37890

Re: More fake units sold on Ebay

I found this schematic and want to replace all elements in order to fix it. Now, looking for smd inductors... Does anyone knows component values of original filter? The values are on the schematics -- what do you mean about "component values of original filter" ? Here's a filter (with exact values)...
by aurgathor
Thu Dec 19, 2019 5:28 am
Forum: RTL-SDR Discussion
Topic: AM frequency help with rtl-sdr USB
Replies: 24
Views: 2794

Re: AM frequency help with rtl-sdr USB

That's a fake, so it may not have the AM band.

Read this: viewtopic.php?f=5&t=4169
and this: https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/
by aurgathor
Wed Dec 18, 2019 11:56 pm
Forum: RTL-SDR Discussion
Topic: Quick software question please ?....
Replies: 2
Views: 404

Re: Quick software question please ?....

Start with SDR#
by aurgathor
Wed Dec 18, 2019 11:53 pm
Forum: RTL-SDR Discussion
Topic: AM frequency help with rtl-sdr USB
Replies: 24
Views: 2794

Re: AM frequency help with rtl-sdr USB

Cheap dongles usually don't have the: Experimental: HF Direct Sampling Mode - Listen to 500 kHz - 24 MHz with direct sampling. Simply connect an HF antenna to the SMA port, and choose the Q-branch mode. There is a built in 25 MHz low pass filter, but additional HF filters may be required for optimal...
by aurgathor
Mon Dec 16, 2019 7:08 am
Forum: Other SDR Devices
Topic: Raspberry Pi Zero W Wifi TX/RX SDR Hack
Replies: 1
Views: 468

Re: Raspberry Pi Zero W Wifi TX/RX SDR Hack

I'm not too familiar with the innards of Wi-Fi chips, but when I tried to look up the datasheets on a few Wi-Fi chips, I couldn't find anything beyond facts and very basic spec sheets. But even you manage to obtain a data sheet with enough information for a driver hack, that may not be enough depend...
by aurgathor
Tue Dec 10, 2019 8:50 pm
Forum: RTL-SDR Discussion
Topic: Newbie : listening 3Khz to 148 Khz with upconverter ?
Replies: 8
Views: 1187

Re: Newbie : listening 3Khz to 148 Khz with upconverter ?

24 bit sound card has dynamic range up to 140 dB... well not all, but let's say we have 130 dB dynamic range. I looked up a few random audio ADCs,. and I don't think you'll normally get that much. For example,. Features • High SNR Performance: – 110- dB SNR(PCM1861/63/65) – 103- dB SNR(PCM1860/62/6...
by aurgathor
Mon Dec 09, 2019 2:23 pm
Forum: RTL-SDR Discussion
Topic: Newbie : listening 3Khz to 148 Khz with upconverter ?
Replies: 8
Views: 1187

Re: Newbie : listening 3Khz to 148 Khz with upconverter ?

Thank you all. @radiolistener "And connect antenna into "line-in" jack of your sound card." As simple as that ? I think you probably want to use "mic in" if available since line level is around 1V, and I don't think you'll get your LW signal high enough for good quality with "line-in" without an ad...
by aurgathor
Mon Dec 09, 2019 11:43 am
Forum: KerberosSDR
Topic: KerberosSDR Developments in 2020
Replies: 19
Views: 4723

Re: KerberosSDR Developments in 2020

I know that very well; however, between the Kerberos' hub and the host, 4 devices have to share the same USB 2.0 bandwidth, and I think speed and latency could be improved with USB 3.0 link in there. It may not apply to RTL-SDRs, but when I tested the speed of several USB 2.0 storage devices with US...
by aurgathor
Sat Dec 07, 2019 11:00 am
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 35
Views: 37890

Re: More fake units sold on Ebay

Good luck with your dispute, though I would look into the cost of return shipping first. There are a few things that you may not want to buy from China such as SD cards, USB flash drives, and rtl-sdr blog v3 software defined radios. Here are a few fakes I could find -- some not even try to look like...