Lowest frequency

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Hombre
Posts: 19
Joined: Sat Oct 10, 2015 9:20 am

Re: Lowest frequency

Postby Hombre » Tue Jul 05, 2016 8:42 pm

Hmmm! What to say.
SDRPlay is capable to receive SAQ and I am receiving session 03 07 2016 and my be see on youtube

https://www.youtube.com/watch?v=5v8EJ3iHuQA

I am located on the south Adriatic in Croatia. Around me has several thunderstorms, receiving second transmitting when propagation is poorly but signal was good. And must to increase AF gain too :D

But. There is not end of story. Time to time I am receiving signal from Russian navaid Alpha on the 14,880kHz
About MSF on the 60kHz and DCF77 on the 77,5 kHz have signals 24 hours on the day.

There is some interesting. My favorite program is SDR Radio and is fantastic program without notch for CW what is necessary when listen NDB because sometime have three or more signals in one kHz. This program or support from SDR Play generate very poor receiving under 18 kHz and when receiving some on VLF I am using one of the older versions SDR Sharp.
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DF1KZ
Posts: 19
Joined: Fri Nov 27, 2015 1:37 pm

Re: Lowest frequency

Postby DF1KZ » Thu Jul 07, 2016 5:33 pm

Hello All,

the station with the lowest frequency I can receive is the RSDN-20 TX on 11,905 kHz.
The SAQ-transmission from 08:41 to 09:07 UTC on July, 03. 2016 was received here 20dB above noise floor using a bandwidth of 200Hz.

Antenna: rf-systems DX-10
Receiver: SDRplay, HDSDR 2.70
QTH: Cologne, Germany
Grid: JO30NX

Wolfgang (DF1KZ)
Last edited by DF1KZ on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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SDRplay (RSP1, RSP2 pro) with:
RFsystems DX-10 (14kHz to 50MHz), ICOM Discone AH8000 (10MHz to 2GHz)
12m above ground

K5TD
Posts: 1
Joined: Fri Jul 22, 2016 10:24 pm

Re: Lowest frequency

Postby K5TD » Fri Jul 22, 2016 11:01 pm

Two questions:
1) Can I use FlexRadio's PowerSDR software with the SDRPlay box?
2) Is anyone in the US able to receive the 25.2kHz station at La Moure, ND with a SDRPlay box? If yes, please state the software you use (PowerSDR or the like), your location and type of antenna.
Thanks.
Robert
K5TD
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rosie
Posts: 6
Joined: Tue Aug 02, 2016 8:13 am

Re: Lowest frequency

Postby rosie » Thu Aug 04, 2016 10:11 am

I tried VLF reception without a converter today. My SDRplay works down to approx 24 kHz. DHO38 (23,4 kHz) is the lowest station i can identify between lots of mirror frequencies. DCF77 is no problem, MSC Crumbia is slightly visible, too. ELF stations like Russian Alpha RSDN20 are not visible. Setting sample-rate, filtering preamp etc. is quite tricky. Sometimes i had to restart SDRsharp.
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mary
Posts: 6
Joined: Mon Aug 08, 2016 9:57 am

Re: Lowest frequency

Postby mary » Mon Aug 08, 2016 10:46 am

17.2 kHz will be too low for SDRplay. However, you can simply use your PC sound card for that.
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FunkInStyle25
Posts: 5
Joined: Thu Aug 11, 2016 11:07 am

Re: Lowest frequency

Postby FunkInStyle25 » Tue Aug 16, 2016 8:36 am

These frequencies, all different diapasons, how it it impact human body?
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Hombre
Posts: 19
Joined: Sat Oct 10, 2015 9:20 am

Re: Lowest frequency

Postby Hombre » Wed Aug 24, 2016 11:24 pm

mary wrote:17.2 kHz will be too low for SDRplay. However, you can simply use your PC sound card for that.


Of course. For SDRplay 17,2kHZ is NOT too low. Sound card is much better at this freq. about DC but this evening I am listen Alpha signal at 14881 with SDR radio(V3) (SDR radio(V2) is deaf). Not perfect like sound card but main signal is clear readable included peak on the audio spectrum. Russian RDL at 18.1kHz is like local in the my QTH on the Croatian South Adriatic Coast.
My congratulations to the Simon for good job in the just preview version (and AF gain without double clicking :D )
Image

Edit: Lowest frequency what I am receive with SDRplay and HDSDR is 50 Hz :mrgreen:
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Hombre
Posts: 19
Joined: Sat Oct 10, 2015 9:20 am

Re: Lowest frequency

Postby Hombre » Wed Aug 31, 2016 4:35 pm

At the this moment this is echoes of the thunderstorms over the Italia to the DC and there signals too.
Image
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