Архив за 03.05.2019

ребят влияет ли на ДД свистка, или на что нибудь ещё, изменение семплрейта в настройках hdsdr или подобных программах? У…

killer258 пишет:
ребят влияет ли на ДД свистка, или на что нибудь ещё, изменение семплрейта в настройках hdsdr или подобных программах? У меня HDSDR. Когда перехожу с 2.4 мsps на 0.25 msps, то помимо появления лож...
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Широкополосный приёмник из DVB донгла - Страница #566

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KerberosSDR • Re: KerberosSDR as a simple RTL-SDR replacement tuner? Seriously.

Just noticed that somebody had commented on the same issue to one of the latest articles regarding KSDR on the rtl-sdr.com main site, url : https://www.rtl-sdr.com/kerberossdr-bat ... available/
I don’t care about their radar thingy in the least. 4 nice SDR’s in a box…

Connected up to my SDRTrunk box and its running along fine using 2 tuners.

Problems are:

1) HEAT – Case needs ventilation holes/slots or a fan – I am likely to ditch the metal case shortly and put it in something else or slice and dice that case for some ventilation…..

2) SDR EEPROM is CORRUPT – Thus rtl_test WILL LIKELY BRICK It to set S/N#, as the corrupt EEPROM has CORRUPT S/N. This is an issue with programs like SDRTRunk which use the S/N’s an index. Although it seems to work by luck or fluke right now with 2 tuners for my main test system.

3) Power – Needs to deal with using a proper DC power connector v. USBC and/or trying to get 3A from a USB port… So get a good 5V 3A+ supply….

4) UBS Ports – Seems to dislike some USB ports. I had it plugged in fine, ran for about a week… now it won’t work in either of those USB ports, I had to dig around on the box to find a USB port it would like… (Device is POWERED BY A PS to the USBC port! 5V 3A)

Have not tried it with OP25 yet, as I been testing out other things…and mainly I am concerned unplugging from that box and port and plugging back in after using OP25 on a different box it won’t work at all on that box.

As for license crap.. you can blame two things…

A) DVSI – The WORST company on the planet to deal with … and even P25 is encumbered with this crap. sighhhh… 99.9% of the cost of this is DVSI’s exorbitant licensing even with real radios makers, its out of this world. I can only imagine the grief and crap uniden had to put up with to get this deal.

B) A certain relationship with a certain site which is enriching one person at the expense of others in the community… Thats why I don’t purchase certain radios, they rely on a data store which I am not enriching with my knowledge. all becuase 99.999999% of users are TOO LAZY to learn to program a device. … sighhhhh.

Statistics: Posted by StandingWave — Fri May 03, 2019 10:51 pm


KerberosSDR • KerberosSDR as a simple RTL-SDR replacement tuner? Seriously.

Hi there,

Now that I finally got my preliminary antennas to be used with the KerberosSDR, I'd like to ask if there's a tutorial anywhere on how to use the KerberosSDR as a simple USB-SDR tuner unit plugged into a desktop PC's USB port, running any typical SDR scanner/tuner software.

Yes, I'm talking about the simplest stuff there is to be done with this "amazing device" - to operate it just as a single or perhaps even a dual-SDR receiver unit? Or did I misinterpret the advertised features of the board?

Sure, the range finding is something I'll look into, but what I'd really want right now is to plug this sucker into a desktop PC, and run either SDRsharp or any supported SDR program on Win7 64bit or Linux environment and just listen to the aether. There seems to be no clear documentation on that whatsoever.

The available instructions that I could find on that one are more or less obscure; such is the case with the forum posts as well.

While it's said in some instances that the KSDR unit will only run on Linux, it's also claimed to being equivalent as running (up to) 4x RTL-SDR units at once. I'm familiar with the RTL-SDR USB dongle stick, they've worked just fine on a Win7/64bit environment with SDRsharp.

Can somebody please clarify this for a KSDR noob like me? Thanks.

Statistics: Posted by StandingWave — Fri May 03, 2019 10:43 pm


Has anyone received the hydrogen 21 cm line at 1420 MHz?

I built a horn antenna as described by this pdf: https://www.cfa.harvard.edu/~npatel/hornAntennaAASposterPDF2.pdf

My set up is: antenna > LNA4ALL > 1420-1470 bandpass filter > LNA4ALL > RTLSDR > PC.

I am powering the LNA4ALL through bias tee as described on the rtl-sdr.com here: https://www.rtl-sdr.com/rtl-sdr-blog-v-3-dongles-user-guide/ and I soldered a wire from one LNA to the other to power both up like so: https://imgur.com/0ObIHgh

Here is a couple pics of my antenna: https://imgur.com/Oztn9uB, https://imgur.com/HzKKUrJ.

Anyway, I'm using SDR# and tuned to 1420 MHz, pointed the antenna at the sun and didn't see any signal whatsoever. I was really hoping that I'd be able to see a strong signal coming from the sun because my ultimate goal was to get a signal coming from the galactic plane. Anyone have any advice for me? This is a school project and I'd really like to be able to report some good results. I'm not sure what I'm doing wrong. Is the signal just too weak to see in SDR#? Do I need to use a different method?

Thanks for reading.

submitted by /u/KKRJ
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Antennas • Re: proper antenna for energy meter monitoring (900Mhz)

That's what the rtl-sdr brought. It brought two:

https://www.amazon.com/gp/product/B011HVUEME/

Statistics: Posted by lamcro — Fri May 03, 2019 8:52 pm


Running Two Dongles off One antenna

Need suggestions on how to run the Discone to two RTL-SDR dongles. What sort of splitter should I use? I have a run of 50ft at max and using RG-6 Quad cable if that matters.

submitted by /u/S33kandD3stroy
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Щас конечно многие будут против…))) Но я использую на 400… мгц обычную польскую антенну с усилителем. Всё стандартно…

dimaxa213 пишет:
Щас конечно многие будут против...))) Но я использую на 400... мгц обычную польскую антенну с усилителем. Всё стандартно только она развёрнута на 90гр для вертикальной поляризации и длинные усы которы...
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Широкополосный приёмник из DVB донгла - Страница #566

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Лучшей антенной для всего диапазона свистка оказался штырь 50 см.с 80 Омным безиндукционным резистором в основании. Рези…

1428 пишет:
Лучшей антенной для всего диапазона свистка оказался штырь 50 см.с 80 Омным безиндукционным резистором в основании. Резистор набран из 20 обычных 0125 Ваттных. Такое решение заставило кабель правильно...
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Широкополосный приёмник из DVB донгла - Страница #566

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Да я этот кусок кабеля оставил из за того что он тонкий и штекер есть в сдр… Может и зря))) Попробую заменить на 1метр…

dimaxa213 пишет:
Да я этот кусок кабеля оставил из за того что он тонкий и штекер есть в сдр... Может и зря))) Попробую заменить на 1метр 50омного кабеля этот огрызок может что и даст...
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Широкополосный приёмник из DVB донгла - Страница #566

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Штатную антенну сразу выбрасываем вместе с кабелем. Штатный кабель просто микрофонный провод. Обязательно купить нормаль…

1428 пишет:
Штатную антенну сразу выбрасываем вместе с кабелем. Штатный кабель просто микрофонный провод. Обязательно купить нормальный тонкий кабель с готовыми разъемами их полно и использовать как переходник с ...
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Широкополосный приёмник из DVB донгла - Страница #566

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