The strange world below Short Wave

A place to discuss the HF and Shortwave listening side of the radio hobby. Discuss equipment, frequencies and antenna systems etc. Anything HF!
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pete_uk
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The strange world below Short Wave

Post by pete_uk » 06 Dec 2018, 22:02

Anyone interesting in things below 160m band, from AM broadcast DX to communications?

I'm always interested in hearing shipping stuff such as NAVTEX but have never heard anything.

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ch25
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Re: The strange world below Short Wave

Post by ch25 » 06 Dec 2018, 22:17

Plenty of traffic there.
I suggest to use http://www.klingenfuss.org/super.htm best source of data IMO.
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Re: The strange world below Short Wave

Post by Tigersaw » 07 Dec 2018, 00:42

You have the NDB's - around 300k - 430k good slow morse practice

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Andy
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Re: The strange world below Short Wave

Post by Andy » 07 Dec 2018, 15:10

There's lots of stuff but you need to reduce your local noise to hear some of it. A loop antenna helps enormously. Navtex is fairly easy to receive and you can download a free decoder from't'internet. Below 150kHz there's all manner of time and frequency standards and even encrypted submarine comms going all the way down to a few kHz. Once or twice a year, the SAQ 17.2 kHz TX comes on from Sweden. This is an ancient 'alternator' transmitter, just a big RF-generating mechanical AC generator putting about 80 kW up the huge vertical antenna. A shot of Grimeton as it appears on my SDR fed from a homebrew loop antenna and an audio snip of it as received on the same set up: The bigger peaks around 20-22 kHz are sub comms stations.
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Farty
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Re: The strange world below Short Wave

Post by Farty » 07 Dec 2018, 20:47

Yes, that band interest me. I'll listen to anything down there, but late night American MW stations are my speciality.
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Tigersaw
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Re: The strange world below Short Wave

Post by Tigersaw » 08 Dec 2018, 00:21

Farty wrote:
07 Dec 2018, 20:47
Yes, that band interest me. I'll listen to anything down there, but late night American MW stations are my speciality.
interesting - give me a time and freq for an easy one

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Re: The strange world below Short Wave

Post by Farty » 08 Dec 2018, 12:15

WBBR in New York, 1130khz, 2300-0200hrs. US stations are on a 10khz channel spacing.
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Re: The strange world below Short Wave

Post by Tigersaw » 08 Dec 2018, 12:42

Farty wrote:
08 Dec 2018, 12:15
WBBR in New York, 1130khz, 2300-0200hrs. US stations are on a 10khz channel spacing.
Thanks, will try with the loop tonight

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