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Re: SDR Starter problem
Posted: Thu Oct 08, 2020 12:22 am
by mbzadegan
There is no transmitter in the proximity of my SDR antenna.
Is there any PDF manual for this model SDR radio?
Re: SDR Starter problem
Posted: Thu Oct 08, 2020 7:51 am
by PD3LK
No there is no manual, it should work the same as any other RTL stick. (plug & play when zadig is installed).
I suspect it is the antenna...the one that came with this box is for VHF/UHF.
Try a indoor HF antenna (
https://www.aliexpress.com/w/wholesale-hf-antenna.html )
Even a few meter wire will do better than this VHF/UHF antenna, try that first to see if the box is ok or not.
Re: SDR Starter problem
Posted: Thu Oct 08, 2020 4:24 pm
by mbzadegan
ok
Try it with another antenna
Thanks for your help.
Re: SDR Starter problem
Posted: Fri Oct 09, 2020 10:53 am
by jdow
mbzadegan wrote: ↑Wed Oct 07, 2020 2:36 pm
Yes exactly, It is Male connector.
Being a paranoid sort please post a picture of the connector showing the front of the connector at about 45 degrees. (coax cable to the rear more or less.) I've had people get confused about what makes the connector male, protruding white insulation cylinder or the protruding pin. I suspect you know what you are doing. But, having seen the error before and who it was who made the error....
{o.o}
Re: SDR Starter problem
Posted: Fri Oct 09, 2020 8:36 pm
by mbzadegan
Yes,
It has a pin in the center of the connector.
Re: SDR Starter problem
Posted: Sun Oct 11, 2020 4:09 pm
by jdow
And at the angle you are holding the connector there appears to be no damage to it.
I forget if you've mentioned it above - have you measured center conductor and shield continuity and an open circuit center conductor to shield?
You are not using a bog standard typical rtlsdr dongle. You might want to try to reconfigure for the I channel. Personally I never bother to use an rtlsdr dongle on HF. I don't know how Simon has his software configured for direct sampling modes. The rtlsdr HF coverage is clumsy and full of problems. Another thing you might want to do is use the 2,400 ksps sample rate setting and tune to 1.5 MHz on the display center.It should cover the broadcast band and more on the top end - if it works. It MAY be that you got a dose of Chineseium there, too. Or it may be an up-converter based tool with an unknown up conversion frequency. I notice it is labeled to work 25 MHz to 1.7 GHz on one port and 100kHz to 30 MHz on the other. I predict you'd be disappointed in its performance down at 30 MHz on the VHF/UHF input, too.
{^_^}
Re: SDR Starter problem
Posted: Sun Oct 11, 2020 4:35 pm
by PD3LK
Hi Joanna, please read from the start. I have the same RTL box. It should work "out of the box" with a decent HF antenna.
Re: SDR Starter problem
Posted: Mon Oct 12, 2020 6:02 am
by m3ghe
What is this other antenna that you have connected? Description please. You will need at least 10 metres of wire with an earth connection to receive anything.
Re: SDR Starter problem
Posted: Mon Oct 12, 2020 6:06 am
by m3ghe
jdow wrote: ↑Sun Oct 11, 2020 4:09 pm
And at the angle you are holding the connector there appears to be no damage to it.
I forget if you've mentioned it above - have you measured center conductor and shield continuity and an open circuit center conductor to shield?
You are not using a bog standard typical rtlsdr dongle. You might want to try to reconfigure for the I channel. Personally I never bother to use an rtlsdr dongle on HF. I don't know how Simon has his software configured for direct sampling modes. The rtlsdr HF coverage is clumsy and full of problems. Another thing you might want to do is use the 2,400 ksps sample rate setting and tune to 1.5 MHz on the display center.It should cover the broadcast band and more on the top end - if it works. It MAY be that you got a dose of Chineseium there, too. Or it may be an up-converter based tool with an unknown up conversion frequency. I notice it is labeled to work 25 MHz to 1.7 GHz on one port and 100kHz to 30 MHz on the other. I predict you'd be disappointed in its performance down at 30 MHz on the VHF/UHF input, too.
{^_^}
Joanne it was established sometime ago that it is a direct sampling conversion. That type can have two antennas permanently attached, 1 VHF/UHF and 2 HF, SDR Console when set to the Direct Sampling mode automatically switches between modes at 28 MHz.
Re: SDR Starter problem
Posted: Mon Oct 12, 2020 6:36 am
by mbzadegan
m3ghe wrote: ↑Mon Oct 12, 2020 6:02 am
What is this other antenna that you have connected? Description please. You will need at least 10 metres of wire with an earth connection to receive anything.
woww, really!!
I have connected only 2m of single wire direct to the connector hole but still no vocal sound on any frequency.
Do you suggest 10m for AM frequencies?