Search found 45 matches

by m_a_x
Thu Jul 11, 2019 7:12 am
Forum: Signal Identification Help
Topic: OT entries in the Sigidwiki
Replies: 0
Views: 75

OT entries in the Sigidwiki

In the recently added signals i find: MFJ-269C Antenna SWR Analyzer this is a commercial spam Strange UHF morse signal if it is morse it does not need to be identified; this is not a frequency database, the purphose is to identify signals, not stations. Who is going to remove them? i see that they c...
by m_a_x
Mon Dec 17, 2018 8:39 am
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 19
Views: 31654

Re: More fake units sold on Ebay

Here is some manufacturer's solution:
https://www.eleafworld.com/info/batchcode.php
by m_a_x
Sun Dec 16, 2018 3:46 pm
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 19
Views: 31654

Re: More fake units sold on Ebay

Username wrote:
Sun Dec 16, 2018 9:37 am
I buy just the genuen nesdr from ebay. :D
Image
smart guy uses the rtl-sdr.com forum because nesdr doesn't give him any support. And he needs support, a lot...
by m_a_x
Sun Dec 16, 2018 8:22 am
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 19
Views: 31654

Re: More fake units sold on Ebay

We've tried issuing takedowns on from Aliexpress and eBay, but as soon as you take one down, three more listings pop up in it's place. I'm not sure if it's a coincidence, but after taking some down we also see an uptick in DDoS and hack attempts on our site. The solution is the one i suggested befo...
by m_a_x
Mon Nov 05, 2018 12:47 pm
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 19
Views: 31654

Re: More fake units sold on Ebay

The best thing is to inform people, if those who buy them and then visit the blog are informed they can claim a refund for having received a counterfeit unit, the sellers start to loose money and have to stop selling them. I would set up something like this: "Did you receive a counterfeit unit from ...
by m_a_x
Sat Nov 03, 2018 6:03 am
Forum: Off-Topic
Topic: More fake units sold on Ebay
Replies: 19
Views: 31654

More fake units sold on Ebay

Check this seller the main picture is from the original dongle but on the others is the fake supplied. Not only the pcb is different but also the case section is rectangular, not convex like in the original. Look carefully and see how they added a SMA connector to the standard dongle. The original M...
by m_a_x
Mon Oct 15, 2018 1:09 pm
Forum: Signal Identification Help
Topic: Is this a weather balloon?
Replies: 2
Views: 14411

Re: Is this a weather balloon?

The recording is correct, it's just that i have never received this type before.
It is a DFM06 sonde over Belgium.
Decode it with SondeMonitor

Image

https://goo.gl/maps/yTZKXmpKph52
https://www.sigidwiki.com/wiki/Graw_DFM ... adiosonde)
by m_a_x
Sun Oct 14, 2018 8:42 pm
Forum: Signal Identification Help
Topic: Is this a weather balloon?
Replies: 2
Views: 14411

Re: Is this a weather balloon?

Did you select NFM? the sound is very weak
by m_a_x
Tue Oct 09, 2018 6:43 pm
Forum: RTL-SDR Discussion
Topic: Custom 400-406 MHZ bandpass filter?
Replies: 3
Views: 2981

Re: Custom 400-406 MHZ bandpass filter?

It's not easy to make a filter so sharp to attenuate a strong signal only a few Mhz away. You should try to increase the received signal using a Yagi and lower the rf gain. Also try to play with the polarization of the Yagi to see if it helps to remove the interferences even if attenuating the recei...
by m_a_x
Thu Aug 30, 2018 8:32 am
Forum: Other SDR Devices
Topic: Remote VLF receiver with soundcard and pc
Replies: 5
Views: 17889

Re: Remote VLF receiver with soundcard and pc

Hi Jel, thank you for the link. I don't know if this could be the solution, it is streaming audio and in a SDR receiver we do not need the demodulated audio file but the raw data. But in this case the audio frequencies match with the radio frequencies to receive...i am a bit confused :? Unless someb...