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The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Markus; I see that. Can't be great all the time! Am waiting for an OCXO I have coming to try out your OPDS-really think it will be great on 73! Congrats on your fabulous development! Bob From: Sun, 20 Oct 2013 12:56:37 +0200 Subject: LF: 74 kHz: XRS and CFH 73.6 kHz [...] Content analysis details: (-0.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [65.55.116.23 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rjraide[at]hotmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: c1dcf088149efa0360827745859da381 Content-Type: multipart/alternative; boundary="_fd351721-aac0-4a56-8cf4-8f52c7037585_" Subject: RE: LF: 74 kHz: XRS and CFH 73.6 kHz X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=FORGED_HOTMAIL_RCVD,HTML_30_40, HTML_MESSAGE,TO_ADDRESS_EQ_REAL autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 1444 --_fd351721-aac0-4a56-8cf4-8f52c7037585_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Markus=3B I see that. Can't be great all the time! Am waiting for an OCXO I have com= ing to try out your OPDS-really think it will be great on 73! Congrats on your fabulous development! Bob =20 From: markusvester@aol.com To: rsgb_lf_group@blacksheep.org Date: Sun=2C 20 Oct 2013 12:56:37 +0200 Subject: LF: 74 kHz: XRS and CFH 73.6 kHz =0A= =0A= =0A= =0A= =0A= Hi Bob=2C 4000'ers=2C=0A= =0A= 74 kHz conditions into Germany were marginal again =0A= last night. Some slim traces appeared here between after 5 UT=2C see http:/= /dl.dropboxusercontent.com/u/26404526/74kHz/74k_131020_0600.png=0A= =0A= As this SpecLab instance is fed by a =0A= FiFi-SDR with 72 kHz LO frequency=2C CFH 73.6 kHz is also in the =0A= passband=2C and it was easy to set up a plotter to track propagation. The = =0A= attached screenshot (also on http://dl.dropboxusercontent.com/u/26404526/74= kHz/plot_131020_0900.png) =0A= shows three traces: =0A= =0A= The red trace is noise from the =0A= Spectrogram around 74.55 kHz=2C normalized to 1 Hz:=0A= noise_n(2540=2C2560)=0A= Note that this noise power includes some junk from =0A= the DCF sidebands.=0A= =0A= The green trace is CFH on 73.6 =0A= kHz=2C measured with SpecLab's MSK monitor set to 300 baud:=0A= pam0(1600=2CMSK300=2C20=2CL5).ampl=0A= The noise floor of this detector is about 10 dB =0A= above the red line. Irregularities between 23 and 1 UT are due to interrupt= ions =0A= during my Opera transmissions and manipulations on the antenna. =0A= =0A= We find that best =0A= propagation from Halifax occured approximately between 22 and 6:30 UT=2C wi= th =0A= another weaker period later in the morning. Throughout the night=2C =0A= there seemed to be hardly any short-term fading on this path.=0A= =0A= The blue trace is supposed to =0A= indicate the strength of the Loran line in the spectrogram:=0A= peak_a(2550.5=2C2550.7)=0A= This line is not strong enough for a =0A= meaningful result. The noise floor is 10 dB below the red line (minus 18 dB= for =0A= 16 mHz vs 1 Hz noise bandwidth=2C plus ~ 8 dB for taking the peak =0A= bin from a 0.2 Hz range). In the future=2C I intend =0A= to replace this trace by a 77.5 kHz monitor for the DCF77 =0A= carrier.=0A= =0A= Best "73"=2C=0A= =0A= Markus (DF6NM in =0A= Nuernberg=2C JN59NJ)=0A= = --_fd351721-aac0-4a56-8cf4-8f52c7037585_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Markus=3B
I see that. Can't b= e great all the time! =3B Am waiting for an OCXO I have coming to try o= ut your OPDS-really =3Bthink it will be great on 73!
Congrats on you= r fabulous development!
Bob
 =3B
= From: markusvester@aol.com
To: rsgb_lf_group@blacksheep.org
Date: Sun= =2C 20 Oct 2013 12:56:37 +0200
Subject: LF: 74 kHz: XRS and CFH 73.6 kHz=

=0A= =0A= =0A= =0A= =0A=
Hi Bob=2C 4000'ers=2C
=0A=
 =3B
=0A=
74 kHz conditions into Germany were ma= rginal again =0A= last night. Some slim traces =3Bappeared here between after 5 UT=2C see=  =3Bhttp://dl.dropboxusercontent.com/u/26404526/74kHz/74k_131020_0600.png=
=0A=
 =3B
=0A=
As this SpecLab instance is fed by a = =0A= FiFi-SDR =3Bwith 72 kHz LO frequency=2C =3BCFH 73.6 kHz is also in = the =0A= passband=2C and it was easy to set up a plotter to track propagation. The = =0A= attached =3Bscreenshot (also on http://dl.dropboxusercontent.com/u/2640= 4526/74kHz/plot_131020_0900.png) =0A= shows three traces: =3B
=0A=
 =3B
=0A=
The red trace is nois= e from the =0A= Spectrogram around 74.55 kHz=2C normalized to 1 Hz:
=0A=
 =3Bnoise_n(2540=2C2560)=0A=
Note that this noise power includes so= me junk from =0A= the DCF sidebands.
=0A=
 =3B
=0A=
The green trace is CF= H on 73.6 =0A= kHz=2C measured with SpecLab's MSK monitor =3Bset to =3B300 baud:
=0A=
 =3Bpam0(1600=2CMSK300=2C20=2CL5).= ampl
=0A=
The noise floor of this detector is ab= out 10 dB =0A= above the red line. Irregularities between 23 and 1 UT are due to interrupt= ions =0A= during my Opera transmissions and manipulations on the antenna. =0A=
 =3B
=0A=
We find that best =0A= propagation =3Bfrom Halifax occured approximately between 22 and 6:30 U= T=2C with =0A= another =3Bweaker =3Bperiod later in the morning. Throughout the&nb= sp=3Bnight=2C =0A= there seemed to be =3Bhardly any short-term fading on this path.=
=0A=
 =3B
=0A=
The blue trace is sup= posed to =0A= indicate the strength of the Loran line in the spectrogram:
=0A=
 =3Bpeak_a(2550.5=2C2550.7)=
=0A=
This line =3Bis not strong enough = for a =0A= meaningful result. The noise floor is 10 dB below the red line (minus 18 dB= for =0A= 16 mHz vs 1 Hz noise bandwidth=2C plus ~ 8 dB for taking the peak =0A= bin =3Bfrom =3Ba 0.2 Hz range). In the future=2C =3BI =3Bin= tend =0A= to =3Breplace =3Bthis trace by a 77.5 kHz =3Bmonitor for the DC= F77 =0A= carrier.
=0A=
 =3B
=0A=
Best "73"=2C
=0A=
 =3B
=0A=
Markus (DF6NM in =0A= Nuernberg=2C JN59NJ)
=0A=
 =3B
=
= --_fd351721-aac0-4a56-8cf4-8f52c7037585_--