Markus, Thank you, I’ll deploy an antenna tomorrow, and run continuous capture, and post-process in Matlab to find and preserve sync with the transmitter’s OCXO-locked ~ 1 kHz tones. A different topic: The last two messages that I’ve sent to [email protected] (one two weeks ago, and one today) yielded messages from [email protected] saying: “Your email was bounced...” …but both messages actually were delivered without delay to [email protected]. Any thoughts on why I received bounce alerts when the messages didn’t bounce? The bounce alert message also said “…your specific problem was a 5.1.2 error. The domain you attempted to contact, pdsengr.com, may have expired.” 73, Jim AA5BW From: [email protected] [mailto:[email protected]] On Behalf Of Markus Vester
Sent: Friday, November 9, 2018 2:29 PM
To: [email protected]
Subject: Re: LF: 1476 kHz AM Hi Jim,
hmm that sounds like a real long shot! I really don't know what's possible. Guess we'll never know unless we try, so yes, give it a go.
Note that the transmitter is not (yet?) GPS-locked but the free-running OCXO appears to maintain it's frequency within a couple of mHz.
Best 73,
Markus
-----Ursprüngliche Mitteilung-----
Von: hvanesce <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Fr, 9. Nov. 2018 20:08
Betreff: RE: LF: 1476 kHz AM Hello Markus,
Is East Coast US (Virginia) out of the question for this? I could deploy an MF antenna this weekend, and run GPSDO-synchronized Matlab post-processing if modulation is still tones.
73, Jim AA5BW From: [email protected] [mailto:[email protected]] On Behalf Of Markus Vester
Sent: Friday, November 9, 2018 10:06 AM
To: [email protected]
Subject: Re: LF: 1476 kHz AM Thanks Tom and Clemens, that's very nice!
Indeed there are some issues with GoogleMaps, for example last time I looked https://sdr.hu/map didn't show the Kiwi SDR locations. As Clemens indicated, http://k7fry.com/grid/?qth=JN59MN21HF should work. Or in proper coordinates, the wire antenna is attached to the tower at 49.546575 N, 11.019437 E.
Best 73,
Markus
-----Ursprüngliche Mitteilung-----
Von: DK1IS <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Fr, 9. Nov. 2018 14:13
Betreff: Re: LF: 1476 kHz AM Am 09.11.2018 um 00:39 schrieb Markus Vester: After the sad demise of all LW and MW broadcasts in Germany, a handful of pioneers came up who are operating legal low-powered medium wave stations in the context of a radio museum or for educational purposes. One of them is Ralph (DL2NDO, one of the participants in the legendary Donebach 137 kHz activation in 2002). He has obtained a transmitting license for 1476 kHz (former frequency of Vienna Bisamberg), built a 3 Watt AM transmitter, and with the help of a small team raised a quarterwave antenna on the Fraunhofer premises south of Erlangen (JN59MN21HF).
Yesterday they got on air for the first time, running a preliminary test transmission consisting of a switched 1000 Hz beeps (one second on, one second off, audio frequency locked to the RF carrier). This pattern will be continued for a few days, before they will eventually.take over the audio from the local DAB student radio "funklust".
The current test pattern is relatively easy to make out in the noise so it may be a good chance for some DX detections. At night we've actually heard the beeps on Twente SDR and a couple of German Kiwi-SDRs. But I guess using narrowband signal processing techniques, the carrier and coherent tones coud make it much further. The carrier frequency is derived from an OCXO and is currently at 1476000.411 Hz.
Will anyone in the group take the challenge?
Best 73,
Markus (DF6NM) Fb audible signal at DL0AO (JN59VK)! RX Perseus, Ant Miniwhip, see screenshot. Slight selective QSB. Similar results with their North America beverage. By the way: all programs using GoogleMaps for QTH-locator identification seem to be inactive because of new Google restrictions. 73,
Tom, DK1IS |
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