Empathy List Archives

PK

Poul-Henning Kamp

Sat, Dec 19, 2015 10:35 AM

It doesn't seem like my old hack to record VLF spectrum works anymore.

Are there anybody in Europe who can do a raw capture of the VLF spectrum
over new years eve to capture the last LORAN-C transmissions as a
historical document ?

Ideally a 1 MSPS ADC directly on a good antenna, but failing that just
a water-fall would be nice...

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

It doesn't seem like my old hack to record VLF spectrum works anymore. Are there anybody in Europe who can do a raw capture of the VLF spectrum over new years eve to capture the last LORAN-C transmissions as a historical document ? Ideally a 1 MSPS ADC directly on a good antenna, but failing that just a water-fall would be nice... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.

MD

Magnus Danielson

Sat, Dec 19, 2015 11:25 AM

Hi Poul-Henning,

On 12/19/2015 11:35 AM, Poul-Henning Kamp wrote:

It doesn't seem like my old hack to record VLF spectrum works anymore.

Are there anybody in Europe who can do a raw capture of the VLF spectrum
over new years eve to capture the last LORAN-C transmissions as a
historical document ?

Ideally a 1 MSPS ADC directly on a good antenna, but failing that just
a water-fall would be nice...

Nice idea. An SDR with the HF mod would probably be the simplest way to
do it. As the Loran-C stations lay on top of each other, using a
multi-station Loran-C receiver in parallel would be nice. The 8000 chain
should suddenly be quite alone.

Cheers,
Magnus

Hi Poul-Henning, On 12/19/2015 11:35 AM, Poul-Henning Kamp wrote: > It doesn't seem like my old hack to record VLF spectrum works anymore. > > Are there anybody in Europe who can do a raw capture of the VLF spectrum > over new years eve to capture the last LORAN-C transmissions as a > historical document ? > > Ideally a 1 MSPS ADC directly on a good antenna, but failing that just > a water-fall would be nice... > Nice idea. An SDR with the HF mod would probably be the simplest way to do it. As the Loran-C stations lay on top of each other, using a multi-station Loran-C receiver in parallel would be nice. The 8000 chain should suddenly be quite alone. Cheers, Magnus

PK

Poul-Henning Kamp

Sat, Dec 19, 2015 12:30 PM

In message 56753E8D.8090006@rubidium.dyndns.org, Magnus Danielson writes:

Nice idea. An SDR with the HF mod would probably be the simplest way to
do it. As the Loran-C stations lay on top of each other, using a
multi-station Loran-C receiver in parallel would be nice. The 8000 chain
should suddenly be quite alone.

Yes. It will be interesting to see if that makes it usable.

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

-------- In message <56753E8D.8090006@rubidium.dyndns.org>, Magnus Danielson writes: >Nice idea. An SDR with the HF mod would probably be the simplest way to >do it. As the Loran-C stations lay on top of each other, using a >multi-station Loran-C receiver in parallel would be nice. The 8000 chain >should suddenly be quite alone. Yes. It will be interesting to see if that makes it usable. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.

LN

Lizeth Norman

Sat, Dec 19, 2015 2:54 PM

Too bad my vacation takes me south of the border for satellite operations..
Bought an Ettus B210 to play with.
mix, filter and sample!

On Sat, Dec 19, 2015 at 7:30 AM, Poul-Henning Kamp phk@phk.freebsd.dk wrote:

In message 56753E8D.8090006@rubidium.dyndns.org, Magnus Danielson writes:

Nice idea. An SDR with the HF mod would probably be the simplest way to
do it. As the Loran-C stations lay on top of each other, using a
multi-station Loran-C receiver in parallel would be nice. The 8000 chain
should suddenly be quite alone.

Yes. It will be interesting to see if that makes it usable.

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Too bad my vacation takes me south of the border for satellite operations.. Bought an Ettus B210 to play with. mix, filter and sample! On Sat, Dec 19, 2015 at 7:30 AM, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: > -------- > In message <56753E8D.8090006@rubidium.dyndns.org>, Magnus Danielson writes: > >>Nice idea. An SDR with the HF mod would probably be the simplest way to >>do it. As the Loran-C stations lay on top of each other, using a >>multi-station Loran-C receiver in parallel would be nice. The 8000 chain >>should suddenly be quite alone. > > Yes. It will be interesting to see if that makes it usable. > > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

JL

Jörg Logemann

Sat, Dec 19, 2015 4:49 PM

I could make a raw capture with a 14bit Perseus or 16bit Elad FDM-S2 and
a good active receiving antenna, but the station I can receive very
strong is Sylt here in Germany. As far as I know this station will not
shut down...

73 Joerg, DL2NI

Am 19.12.2015 um 12:25 schrieb Magnus Danielson:

Hi Poul-Henning,

On 12/19/2015 11:35 AM, Poul-Henning Kamp wrote:

It doesn't seem like my old hack to record VLF spectrum works anymore.

Are there anybody in Europe who can do a raw capture of the VLF spectrum
over new years eve to capture the last LORAN-C transmissions as a
historical document ?

Ideally a 1 MSPS ADC directly on a good antenna, but failing that just
a water-fall would be nice...

Nice idea. An SDR with the HF mod would probably be the simplest way
to do it. As the Loran-C stations lay on top of each other, using a
multi-station Loran-C receiver in parallel would be nice. The 8000
chain should suddenly be quite alone.

Cheers,
Magnus

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

--
Dipl.Ing.(FH) Jörg Logemann
Veilchenstraße 3
D-89150 Laichingen
Germany
Tel. +49 7333 922506
Mobil +49 171 2814359
Fax. +49 7333 922507
mail: joerg.logemann@t-online.de

I could make a raw capture with a 14bit Perseus or 16bit Elad FDM-S2 and a good active receiving antenna, but the station I can receive very strong is Sylt here in Germany. As far as I know this station will not shut down... 73 Joerg, DL2NI Am 19.12.2015 um 12:25 schrieb Magnus Danielson: > Hi Poul-Henning, > > On 12/19/2015 11:35 AM, Poul-Henning Kamp wrote: >> It doesn't seem like my old hack to record VLF spectrum works anymore. >> >> Are there anybody in Europe who can do a raw capture of the VLF spectrum >> over new years eve to capture the last LORAN-C transmissions as a >> historical document ? >> >> Ideally a 1 MSPS ADC directly on a good antenna, but failing that just >> a water-fall would be nice... >> > > Nice idea. An SDR with the HF mod would probably be the simplest way > to do it. As the Loran-C stations lay on top of each other, using a > multi-station Loran-C receiver in parallel would be nice. The 8000 > chain should suddenly be quite alone. > > Cheers, > Magnus > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. -- Dipl.Ing.(FH) Jörg Logemann Veilchenstraße 3 D-89150 Laichingen Germany Tel. +49 7333 922506 Mobil +49 171 2814359 Fax. +49 7333 922507 mail: joerg.logemann@t-online.de

G

Graham

Sat, Dec 19, 2015 7:13 PM

Would you be able to record what you want via the online web SDR at the
Twente University?

http://websdr.ewi.utwente.nl:8901/

cheers, Graham ve3gtc

On 2015-12-19 10:35, Poul-Henning Kamp wrote:

It doesn't seem like my old hack to record VLF spectrum works anymore.

Are there anybody in Europe who can do a raw capture of the VLF spectrum
over new years eve to capture the last LORAN-C transmissions as a
historical document ?

Ideally a 1 MSPS ADC directly on a good antenna, but failing that just
a water-fall would be nice...

Would you be able to record what you want via the online web SDR at the Twente University? http://websdr.ewi.utwente.nl:8901/ cheers, Graham ve3gtc On 2015-12-19 10:35, Poul-Henning Kamp wrote: > It doesn't seem like my old hack to record VLF spectrum works anymore. > > Are there anybody in Europe who can do a raw capture of the VLF spectrum > over new years eve to capture the last LORAN-C transmissions as a > historical document ? > > Ideally a 1 MSPS ADC directly on a good antenna, but failing that just > a water-fall would be nice... >

RS

Rob Sherwood.

Sat, Dec 19, 2015 8:40 PM

The Perseus has a higher dynamic range than the Elad, if that matters. Rob, NC0B

Sent from my iPad

On Dec 19, 2015, at 1:30 PM, "Jörg Logemann" joerg.logemann@lai.de wrote:

I could make a raw capture with a 14bit Perseus or 16bit Elad FDM-S2 and
a good active receiving antenna, but the station I can receive very
strong is Sylt here in Germany. As far as I know this station will not
shut down...

73 Joerg, DL2NI

Am 19.12.2015 um 12:25 schrieb Magnus Danielson:
Hi Poul-Henning,

On 12/19/2015 11:35 AM, Poul-Henning Kamp wrote:
It doesn't seem like my old hack to record VLF spectrum works anymore.

Are there anybody in Europe who can do a raw capture of the VLF spectrum
over new years eve to capture the last LORAN-C transmissions as a
historical document ?

Ideally a 1 MSPS ADC directly on a good antenna, but failing that just
a water-fall would be nice...

Nice idea. An SDR with the HF mod would probably be the simplest way
to do it. As the Loran-C stations lay on top of each other, using a
multi-station Loran-C receiver in parallel would be nice. The 8000
chain should suddenly be quite alone.

Cheers,
Magnus

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

--
Dipl.Ing.(FH) Jörg Logemann
Veilchenstraße 3
D-89150 Laichingen
Germany
Tel. +49 7333 922506
Mobil +49 171 2814359
Fax. +49 7333 922507
mail: joerg.logemann@t-online.de

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

--
If this email is spam, report it to
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The Perseus has a higher dynamic range than the Elad, if that matters. Rob, NC0B Sent from my iPad > On Dec 19, 2015, at 1:30 PM, "Jörg Logemann" <joerg.logemann@lai.de> wrote: > > > > I could make a raw capture with a 14bit Perseus or 16bit Elad FDM-S2 and > a good active receiving antenna, but the station I can receive very > strong is Sylt here in Germany. As far as I know this station will not > shut down... > > 73 Joerg, DL2NI > >> Am 19.12.2015 um 12:25 schrieb Magnus Danielson: >> Hi Poul-Henning, >> >>> On 12/19/2015 11:35 AM, Poul-Henning Kamp wrote: >>> It doesn't seem like my old hack to record VLF spectrum works anymore. >>> >>> Are there anybody in Europe who can do a raw capture of the VLF spectrum >>> over new years eve to capture the last LORAN-C transmissions as a >>> historical document ? >>> >>> Ideally a 1 MSPS ADC directly on a good antenna, but failing that just >>> a water-fall would be nice... >> >> Nice idea. An SDR with the HF mod would probably be the simplest way >> to do it. As the Loran-C stations lay on top of each other, using a >> multi-station Loran-C receiver in parallel would be nice. The 8000 >> chain should suddenly be quite alone. >> >> Cheers, >> Magnus >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > -- > Dipl.Ing.(FH) Jörg Logemann > Veilchenstraße 3 > D-89150 Laichingen > Germany > Tel. +49 7333 922506 > Mobil +49 171 2814359 > Fax. +49 7333 922507 > mail: joerg.logemann@t-online.de > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > > -- > If this email is spam, report it to > https://support.onlymyemail.com/view/report_spam/ODExMjI6MTgzNjI2Nzc5MTpyb2JAbmMwYi5jb206ZGVsaXZlcmVk >

PK

Poul-Henning Kamp

Sat, Dec 19, 2015 8:58 PM

In message 56758AA9.6000000@lai.de, =?UTF-8?Q?J=c3=b6rg_Logemann?= writes:

I could make a raw capture with a 14bit Perseus or 16bit Elad FDM-S2 and
a good active receiving antenna, but the station I can receive very
strong is Sylt here in Germany. As far as I know this station will not
shut down...

I have not been able to find any announcements about Sylt either, but
it would be truly strange if that single station continues running...

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

-------- In message <56758AA9.6000000@lai.de>, =?UTF-8?Q?J=c3=b6rg_Logemann?= writes: >I could make a raw capture with a 14bit Perseus or 16bit Elad FDM-S2 and >a good active receiving antenna, but the station I can receive very >strong is Sylt here in Germany. As far as I know this station will not >shut down... I have not been able to find any announcements about Sylt either, but it would be truly strange if that single station continues running... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.

PK

Poul-Henning Kamp

Sat, Dec 19, 2015 10:01 PM

In message 5675AC3C.8020204@aei.ca, Graham writes:

Would you be able to record what you want via the online web SDR at the
Twente University?

Not really. That would only give a water-fall.

What I think should be preserved is the actual raw, unadultered signal on air.

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

-------- In message <5675AC3C.8020204@aei.ca>, Graham writes: >Would you be able to record what you want via the online web SDR at the >Twente University? Not really. That would only give a water-fall. What I think should be preserved is the actual raw, unadultered signal on air. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.

LN

Lizeth Norman

Sat, Dec 19, 2015 11:10 PM

That's what I said. 61.44MS/s. This thing is a fire hose.
Saturate a usb 3.1 without much problem.
Gotta love computing!

On Sat, Dec 19, 2015 at 5:01 PM, Poul-Henning Kamp phk@phk.freebsd.dk wrote:

In message 5675AC3C.8020204@aei.ca, Graham writes:

Would you be able to record what you want via the online web SDR at the
Twente University?

Not really. That would only give a water-fall.

What I think should be preserved is the actual raw, unadultered signal on air.

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

That's what I said. 61.44MS/s. This thing is a fire hose. Saturate a usb 3.1 without much problem. Gotta love computing! On Sat, Dec 19, 2015 at 5:01 PM, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: > -------- > In message <5675AC3C.8020204@aei.ca>, Graham writes: > >>Would you be able to record what you want via the online web SDR at the >>Twente University? > > Not really. That would only give a water-fall. > > What I think should be preserved is the actual raw, unadultered signal on air. > > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

time-nuts@lists.febo.com

Anybody who can record last Loran-C transmissions ?