Архив за 09.03.2019

RTL-SDR Discussion • Re: USA-Satcom contact

You could try tweeting him @usa_satcom.

He wants to see proof that you can receive the signal (to stop thieves repackaging his software), so make sure you show that in your contact form.

Statistics: Posted by rtlsdrblog — Sat Mar 09, 2019 10:43 pm


Off-Topic • Re: I cannot unsubscribe

Messages from this forum? Or do you mean the comments on the blog? Can i please see a screenshot of the error that you get when you try to unsub?

Statistics: Posted by rtlsdrblog — Sat Mar 09, 2019 10:36 pm


Comment on Reducing HF Electrical Noise by Using a Faraday Cage for Switch-Mode Power Supplies by Vonu

Nothing is cheaper than .001uF ceramic caps applied where necessary, but it is up to you to do so. A dime a piece is hard to beat.

Alexander Karabanov

Тест авиа антенны для 1090 МГц ADSB

Тест авиа антенны для 1090 МГц ADSB (00:03:20)

Is this the Meteor-M 2 "black line glitch"?

Is this the Meteor-M 2 "black line glitch"? submitted by /u/derekcz
[link] [comments]

Has anyone received images from the Russian Elektro-L geostationary satellites?

Link:https://en.wikipedia.org/wiki/Elektro%E2%80%93L

They seem to transmit at 7.5GHz so maybe a certain type of commercial LNB can be used to downconvert it to RTL-SDR frequencies? I never even knew that there's a weather geosat over my head :)

submitted by /u/SaddamismIsEvil
[link] [comments]

Comment on Reducing HF Electrical Noise by Using a Faraday Cage for Switch-Mode Power Supplies by Mac

Sure, but it would benefit only if the case of your SDR receiver is made out of plastic. The metalllic casing usually used in good quality SDR devices is good enough to filter out such HF-noise caused by household appliances – and remember that the main “input” to your SDR receiver is the antenna itself, not the IC board or other electronics that the receiver is made from.

Comment on Photos of the MSi.SDR Dongle: A New SDRplay RSP1 Clone by Timmy

So instead signing a NDA and buying 10k of really cheap chips from Mirics (where SDRplay buys it chips), they would use garbage bin chips – that makes total sense to me.

Comment on Reducing HF Electrical Noise by Using a Faraday Cage for Switch-Mode Power Supplies by Mac

Using ferrite clamps and toroids are the basic thing to do, sometimes it is just not practical nor cheap as good quality toroids are quite expensive. With this kind of metallic mesh you can get outstanding results with just a few euros. The material I used cost 15 euros, but I used only like 1/10 of it so roughly this cost 1,5 euros to make – and some beer 🙂

Comment on Photos of the MSi.SDR Dongle: A New SDRplay RSP1 Clone by Timmy

As far as I remember the original RSP1 (which is no longer sold) had a +/-10 ppm crystal (which never appear in any specs for the device). A modern 0.5 ppm TCXO, which have dropped dramatically in price since the first RSP1 receivers were sold, is going to win. So it would be a biased comparison comparing old hardware to new.

But on the flip side when buying really cheap knockoffs you are basically guaranteed that any minerals used are going to be from the cheapest vendors, which typically means conflict resources (natural resources extracted and sold to perpetuate the killing over the resources in that area) will be used. e.g. tantalum capacitors made from Coltan bought from the conflict region in the Democratic Republic of Congo, also Cassiterite for tin used in solder. Reputable supply chains have auditing and reporting requirements for the resources that they use.

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