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Amateur Radio Data Transmissions - For discussion of all modes used to send data such as APRS and packet.

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Old 04-11-2017, 9:55 PM
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Default What are the "church bells" sound on 7.0874mhz?

I heard this at 10:51EST in the suburbs of washington DC using DSB with a 68' longwire antenna. Are they a numbers station? They sound like church bells but with no decay, just jumping up and down in tone.
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Old 04-11-2017, 9:55 PM
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Can you decode on fldigi?
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Old 04-11-2017, 9:57 PM
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better pic
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Old 04-11-2017, 10:01 PM
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zoomed in
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Old 04-12-2017, 12:51 AM
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Piccolo? Domino?

Here's my "go-to" for unidentified noises!

https://www.nonstopsystems.com/radio...ml#top-of-page
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Last edited by majoco; 04-12-2017 at 12:58 AM..
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Old 04-12-2017, 2:11 AM
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All I see is JT65 and JT9. Set your computer clock within 2 seconds of a standard time and you should be able to decode it correctly with WSJTx

WSJT Home Page
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Old 04-12-2017, 6:17 AM
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As this is clearly in the ham bands, it's been moved accordingly

We have several other sites with audio samples and waterfalls of various modes; see the Software section (which has a sub section for this) of...

Digital Amateur Radio - The RadioReference Wiki

and in our HF Appendix, there's a Sonograms section...

HF Appendix - The RadioReference Wiki

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Old 04-12-2017, 6:46 AM
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Have you got a recorded WAV or MP3 sample?
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Old 04-12-2017, 7:17 AM
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Quote:
Originally Posted by kk6jtl View Post
All I see is JT65 and JT9. Set your computer clock within 2 seconds of a standard time and you should be able to decode it correctly with WSJTx

WSJT Home Page
I agree. JTxx looks and sounds as the OP described.

Pretty cool mode. Really fun for weak-signal work (I think it was originally designed for moon bounce).
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Old 04-12-2017, 7:37 AM
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Yup, and it should be noted that JT65 has 3 variations, from what I've read - JT65A, B and C. If it is JT65, MultiPSK will handle it along with WSJT - if it's JT9, MultiPSK won't cut it, but WSJT will...

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Old 04-12-2017, 10:36 AM
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If its jt65 what submode is it any one know......

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Old 04-12-2017, 10:48 AM
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There are some waveforms and descriptions of JT65 and JT9 here...

JT65 - Signal Identification Wiki

JT9 - Signal Identification Wiki

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Old 04-13-2017, 12:21 AM
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I'll have to download WSJT, some really big signals here at 0520z/1720local on the gray line, 7076kHz. Other good DX too from all over Europe.
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Old 04-13-2017, 7:41 PM
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Is there an easy way to record from sdruno using widows 10 and vbcable?
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Old 04-14-2017, 12:53 AM
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Quote:
Originally Posted by kk6jtl View Post
All I see is JT65 and JT9. Set your computer clock within 2 seconds of a standard time and you should be able to decode it correctly with WSJTx

WSJT Home Page
So I got that up and running I think. I have the sdruno using its output as vbcable. wsjt's input as vbcable and speakers out. The water fall is doing something but no sound. Is that normal? I set it to whisper and set the sdruno to the low frequency LW band. How do I know if its working? Do you have to mess with the sdruno every time you want to change frequencies?
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Old 04-16-2017, 9:48 PM
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Quote:
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So I got that up and running I think. I have the sdruno using its output as vbcable. wsjt's input as vbcable and speakers out. The water fall is doing something but no sound. Is that normal? I set it to whisper and set the sdruno to the low frequency LW band. How do I know if its working? Do you have to mess with the sdruno every time you want to change frequencies?
Your sound setting look right.

Set it to "JT9 + JT65" and leave the sdruno on 40m 7.076MHz USB at night, 20m 14.076MHz USB during daylight.

At :45 seconds into a minute, the computer stars decoding what it received from :00 to :45

By :55 seconds, you should have decodes if someone is transmitting.

At :00 seconds, responses to the last set of transmissions begin.


If JT9+JT65 works, then switch over to LW frequency and WSPR. Wait. It will come if there is something.
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