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Antennas • Re: Recommended outdoor antenna for SDR?

There are active antennas that provide the frequency range you want, e.g. like the R&S®HE700 with the Rod antenna but than the price is also quite high, since with the other antenna elements it works up to 18 GHz (thats 18 000 MHz).

Models Frequency range
R&S®HE700 10 kHz to 18 GHz
R&S®HE700 Rod antenna 10 kHz to 100 MHz
R&S®HE700 Dipole antenna 100 MHz to 1500 Hz
R&S®HE700 Spiral antennas 1.5 GHz to 18 GHz

You might try an active antenna the cheapest form is a short whip with an associated pre-amplifier. For starter from an old active car antenna could do, since it had to work for AM and FM (~600 kHz up to ~108 MHz).
If you search the internet you will find ideas how to DIY e.g. http://www.g8jnj.net/activeantennas.htm.
Comercial active antennas come in price ranges from a few hundred up to and exceeding 10 000 € (e.g. like the R&S antenna above), but then you get several GHz of Bandwidth and all the bells and whistles you could possibly wish for.

For SW and below just put 5 or more meter of wire horizontally up for FM and above simple groundplanes will do, since for receive you can get away with a lot and still receive signals. You can always improve with time

Statistics: Posted by snn47 — Sun Jan 20, 2019 6:48 am


Troubleshooting Help • Is there any way to run audio through DAP BEFORE Aux VFO???

I'm trying to run a voice inverted signal through the DAP then out the AUX VFO to VB Cable then to a Zello application. I can get this to work if it is the selected frequency and running through the default audio device selected in Windows but when I route it out the Aux VFO it is still scrambled. Is there any way to make DAP process the audio BEFORE it is routed out the Aux VFO????

Statistics: Posted by Fireman3351 — Sun Jan 20, 2019 4:35 am


RTL-SDR Discussion • SW Definitions

Shortwave definitions vary slightly between ITU regions between 1.6 to 1.8 MHz up to 30 MHz see https://en.wikipedia.org/wiki/Shortwave_radio

While TV channel 1 existed in the beginning, most TV Turner in the past 50 years tuned only between channel 2 to 13, and did not provide means for tuning to channel 1. WIth CATV and use of analogue and digital TV norms (meaning e.g. D2MAC and not todays DVB-x modulation) thigs became more complicated.

Until the 6 m was opened HAM SW receiver covered at best 160 m to 10 m, but never above 30 MHz (e.g. Drake or Heathkit, Yeasu, Kennwood ...).

Statistics: Posted by snn47 — Sun Jan 20, 2019 4:24 am


RTL-SDR Discussion • Re: weak reception in ADS-B using upconverter

Many thanks for your comments ! :)

Statistics: Posted by zytorx — Sat Jan 19, 2019 7:09 pm


Troubleshooting Help • Re: Cannot Access RTL Device

Running MX18 64 bit linux.

Run rtl_test -t

Come back with:

Found 1 device (s):

0: Realtek, RTL2838UHIDIR, S/No. 00000001

Using Device 0: Generic RTL2832U OEM

Kernel driver is active, or device is claimed by second instance of librtlsdr.
In first case, please either detach or blacklist the kernel module (dvd_USB_rtl28xxu), or enable automatic detaching at compile time.

usb_claim_interface error -6
Failed to open rtlsdr device #0.

Used Second edition RTL-SDR for Linux
Quick Start Guide
by K. Ranous KA0SBL
To install software.

Please help complete noob. Had it running on main machine now trying to run it on a laptop.

Statistics: Posted by Rextrunt — Sat Jan 19, 2019 6:31 pm


Other SDR Devices • Re: Recieve 2.4 & 5.8G Drone camera-video with Portapack

The portapack software doesn't have anything like that i'm afraid.

Statistics: Posted by rtlsdrblog — Sat Jan 19, 2019 12:40 pm


RTL-SDR Discussion • Re: RTL-SDR driver won’t install

speedy1wrc wrote:
Sat Jan 19, 2019 10:11 am
Can't get the driver to install either.

Win7

Device manage shows "other device" "Bulk-in interface" however it says there is no driver. Zadig 2.01, 2.22, 2.24 all run and leave me with a green arrow, but no driver.

I manually extracted the drivers to a directory and if I tell it to update the driver and point it to that directory it says there is no driver for my device.

I have Winusb on my computer but I can only set RTL SDR up as a USB device.

In the app I can select the RTL SDR but under configuration there are no devices at all.
Can you show a screenshot of what your zadig screen shows?

Statistics: Posted by rtlsdrblog — Sat Jan 19, 2019 12:37 pm


Other SDR Devices • Recieve 2.4 & 5.8G Drone camera-video with Portapack

As the topic is it possible to recieve video from drone transmitting cameras with portapack? Any ideas about this, i think it would be very intresting .

Statistics: Posted by Eagle72 — Sat Jan 19, 2019 11:52 am


User Projects • Re: Newbie question on demodulation

Thanks for the info...
https://cartoonhd.org.in/

Statistics: Posted by harshak3 — Sat Jan 19, 2019 11:12 am


RTL-SDR Discussion • Re: RTL-SDR driver won’t install

Can't get the driver to install either.

Win7

Device manage shows "other device" "Bulk-in interface" however it says there is no driver. Zadig 2.01, 2.22, 2.24 all run and leave me with a green arrow, but no driver.

I manually extracted the drivers to a directory and if I tell it to update the driver and point it to that directory it says there is no driver for my device.

I have Winusb on my computer but I can only set RTL SDR up as a USB device.

In the app I can select the RTL SDR but under configuration there are no devices at all.

Statistics: Posted by speedy1wrc — Sat Jan 19, 2019 10:11 am


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