Return-Path: X-Spam-DCC: paranoid 1102; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,HTML_50_60,HTML_MESSAGE,HTML_TINY_FONT,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u4DK28FS025671 for ; Fri, 13 May 2016 22:02:08 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1b1JDV-0002bw-J0 for rs_out_1@blacksheep.org; Fri, 13 May 2016 20:57:45 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1b1JDN-0002bn-TT for rsgb_lf_group@blacksheep.org; Fri, 13 May 2016 20:57:37 +0100 Received: from smtpcmd0763.aruba.it ([62.149.156.63] helo=smtpdb7.aruba.it) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1b1JDI-0006yW-3o for rsgb_lf_group@blacksheep.org; Fri, 13 May 2016 20:57:36 +0100 Received: from ik0vve.net ([62.149.158.90]) by smtpcmd07.ad.aruba.it with bizsmtp id tvxW1s00P1xJdJu01vxWP2; Fri, 13 May 2016 21:57:30 +0200 Date: Fri, 13 May 2016 21:57:30 +0200 Message-Id: In-Reply-To: <572D1C3D.5030301@posteo.de> References: =?iso-8859-1?q?=3CO6FK1F=244E758375A73045921482661B20E9AE5A=40ik0vve?= =?iso-8859-1?q?=2Enet=3E_=3CO6HQVJ=242F7891F4C3FDD2B2A991A8F465C21493?= =?iso-8859-1?q?=40ik0vve=2Enet=3E_=3C572619ED=2E1040402=40posteo=2Ede?= =?iso-8859-1?q?=3E_=3CO6K58G=24E1D0A268B18973C74C9FF0C89110836A=40ik0?= =?iso-8859-1?q?vve=2Enet=3E_=3C5727BB25=2E7020001=40posteo=2Ede=3E_?= =?iso-8859-1?q?=3CO6KSUW=24C45E4DCC152C42E90B3752DF6213F403=40ik0vve?= =?iso-8859-1?q?=2Enet=3E_=3C57287047=2E7000303=40posteo=2Ede=3E_=3CO6?= =?iso-8859-1?q?RYFA=24A2E46C5D83527136F56334B1871AE185=40ik0vve=2Enet?= =?iso-8859-1?q?=3E_=3C572D1C3D=2E5030301=40posteo=2Ede=3E?= MIME-Version: 1.0 X-Sensitivity: 3 From: "Max IK0VVE" To: rsgb_lf_group@blacksheep.org X-XaM3-API-Version: V3(R2) X-SenderIP: 195.125.179.185 X-HELO-Warning: Remote host 62.149.156.63 (smtpcmd0763.aruba.it) used invalid HELO/EHLO smtpdb7.aruba.it - verification failed X-Scan-Signature: e3d323418d60e0f7f0af176deb9f3e2b Subject: Re: LF: testing VLF grabber ... V0.2 Content-Type: multipart/alternative; boundary="_=__=_XaM3_.1463169450.2A.341063.42.1975.52.42.007.285422313" 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 X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8052 --_=__=_XaM3_.1463169450.2A.341063.42.1975.52.42.007.285422313 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Stefan & friends,=0A=0AWith new GPS the music has changed=C2=A0http://= www.ik0vve.net/wp-content/uploads/2016/05/gpsok.png=0AThe old one does no= t show the slope at 1pps signal.=0AThe PC that I'm using for the test gra= bbers is too slow and I can't go at 47uHz with it: the waterfall never ap= pears. Trying with newer and more powerful PC all is ok.=0A=0A=0ATo be co= ntinued...=0A=0A=0A73, Max IK0VVE=0A=0A=0A______________________________=C2= =A0...here some of my HAM Radio projects...SkyGeM RotatorAntennaDinamicaR= CR-DX=0Awww.ik0vve.net=0A=0A=0ADa: owner-rsgb_lf_group@blacksheep.org=0AA= : rsgb_lf_group@blacksheep.org=0ACc: =0AData: Sat, 07 May 2016 00:35:41 += 0200=0AOggetto: Re: LF: testing VLF grabber=0A=0A=0A=0A=0A=0A =0A=0A=0AH= ello Max, =0A=0A=0A=0AYour motivation is pleasant. The stuff we all need = to reach exciting=0Aresults together :-)=0A=0A=0A=0AAm 06.05.2016 23:30, = schrieb Max IK0VVE:=0A=0A Stefan, all,=0A =0A=0A I do not have time to= reach you that you already run away to=0Alower frequencies, HI.=0A =0A = =0A=0AYes, sorry, it's a bit unpredictable what i'm doing these days but= the=0Aare more transmit stations on 8.27 kHz. Also i will come back of=0A= course. And by this way i keep the center frequency 8.27 kHz free for=0Ao= ther TX stations. I can try to decode EbNaut on 8.27 when transmitting=0A= on 6.47 during the same time.=0A=0A=0A =0A =0A =0A=0A =0A I passed t= he last nights to try to discipline my audio board=0Awith my 1pps GPS... = nothing to do, I've tried all, levels, phases,=0Aetc... I followed the Wo= lf's tutorial without success. I suppose duty=0Acycle is to low. I'm wait= ing for a new GPS so I'll try with that or in=0Athe worst case with an OC= XO+GPS 10khz.=0A =0A =0A=0ADid you watch the signal on the oscilloscope= and on the scope of=0ASpecLab? I need more precise infos to give some ad= vice, maybe a capture=0Aof the scope and the schematic how you coupled th= e module to the input.=0A=0A=0A=0A=0A =0A So only for test now I'm poin= ting to German LF station DHO.=0AInserted BP and NB and moved to about 10= 0uHz the resolution of the=0Agrabber.=0A =0A=0ADid you enable "1 pixel p= er FFT bin"? That would be recemmended.=0A=0A=0A =0A =0A=0A =0A Tomor= row a little trip, not so far, to an Ham friend to listen=0Aif his zone i= s quieter than where I live.=0A =0A=0AUFB!=0A=0A=0A =0A =0A=0A =0A I= 'm interested to your Raspberry Pi remote system, can we get=0Amore infor= mations?=0A =0A=0AWow, of course that is a large project and i could wri= te for hours. But=0Aa rough overview should be no problem:=0A=0A-The Rasp= i 2B is used=0A=0A-I'm using a 2.4 GHz link, with this yagi=0Ahttp://www.= brennpunkt-srl.de/eshop/product_info.php?products_id=3D188=0Aover a dista= nce of 3.5 km in combination with USB WLAN Sticks (ALFA=0AAWUS036NEH runn= ing in 'g' mode) connected to the Raspi.=0A=0A-Two stereo USB soundcards = are connected to the Raspi, one for MF, the=0Aother for VLF. The samplera= te is 48 kS/s.=0A=0A-The radio signals of MF are converted to a range of = the soundcard=0A(0...24 kHz), VLF comes in directly.=0A=0A-Darkice and Ic= ecast2 software is running as a web radio, vorbis stereo=0Astream. Each s= tereo stream needs 20% CPU power, about.=0A=0A-For VLF, i'm using the rig= ht channel to transfer 1 pps + NMEA signals=0Afrom a cheap GPS module (13= =E2=82=AC) which consumes just 40 mA at 3.3V. This=0Aallows to get an ul= tra stable signal which is necessary for the 47 uHz=0Awindow.=0A=0A-On th= e other end, SpecLab is playing the stream from it's IP adress,=0Agenerat= es the first spectrogram ('wideband' on the top of the page=0Ahttp://www.= iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html )=0Aand feeds = the audio signal to VAC1. All other SL instances take the=0Aaudio signal = from VAC1 then, so the stream has just one client.=0A=0A-There is a batte= ry voltage and current monitoring so i can all the=0Atime monitor the ene= rgy situation on the tree. The curves are displayed=0Aat=0Ahttp://www.iup= .uni-heidelberg.de/schaefer_vlf/DK7FC_remote_Grabber_tech.html=0A(I nned = to cut some branches because the sun is now shining from a=0Ahigher angle= , so there is some shadow on the solar modules in the=0Aafternoon. But i = don't want to cut them :-) In winter it is no=0Aproblem...)=0A=0A-There a= re additional circuits for protecting the batteries from deep=0Adischarge= s and there is a homemade accu charger that has a temperature=0Aregulated= cutoff voltage.=0A=0A-Currently 2 solar modules, 50Wp each, are used. An= d 3 lead gel accus=0A12V/18Ah.=0A=0A- So far i prefer loop antennas for M= F and VLF. Two orthogonal loops=0Afor each band, allowing RDF spectrogram= s. MF is running at=0Ahttp://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC= _remote_RDF_Grabber.html=0A, VLF is not so easy in RDF because the second= channel is occupied by=0Apps+NMEA. But there must be a solution!=0A=0A- = In previous versions of the system i used a bistabile relay to switch=0Aa= ntennas remotely. That worked very well.=0A=0A-The power consumption of t= he system is about 3W now since two=0Asoundcards + the GPS module + 40% C= PU power is running permanently.=0A=0A--------=0A=0A=0A=0ADon't know if y= ou already started to play with the Raspi or if you are=0Askilled in Linu= x. I spent dozens of hours to get it running as it is=0Anow. But there we= re great success moments many times. And i find the=0Asystem availability= is quite good, better then expected in the=0Abeginning.=0A=0AI don't wan= t to miss the project a single day :-)=0A=0A=0A=0A73, GL, Stefan=0A=0A=0A= =0A=0A =0A =0A=0A =0A Thanks, 73, Max IK0VVE=0A =0A=0A =0A=0A=0A=0A= --_=__=_XaM3_.1463169450.2A.341063.42.1975.52.42.007.285422313 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Stefan &am= p; friends,

With new GPS the music has changed http://www.ik0vve= .net/wp-content/uploads/2016/05/gpsok.png
The old one does = not show the slope at 1pps signal.
The PC that I'm using for th= e test grabbers is too slow and I can't go at 47uHz with it: the waterfal= l never appears. Trying with newer and more powerful PC all is ok.
<= div>
To be continued...

73, Max IK= 0VVE


______________________________

 
...here some of my HAM Radio projects...
=
AntennaDinamica
<= i>


=0A
Da: o= wner-rsgb_lf_group@blacksheep.org
=0A
A: rsgb_= lf_group@blacksheep.org
=0A
Cc:
=0A=
Da= ta: Sat, 07 May 2016 00:35:41 +0200
=0AOggett= o: Re: LF: testing VLF grabber
=0A
=0A=0A= =0A=0A =0A=0A=0AHello Max,
=0A
=0AYour motivation is pleasant. Th= e stuff we all need to reach exciting=0Aresults together :-)
=0A
=0A= Am 06.05.2016 23:30, schrieb Max IK0VVE:=0A
=0A
Stefan, all,=0A

=0A
I do not have t= ime to reach you that you already run away to=0Alower frequencies, HI.=0A
=0A
=0A
=0AYes, sorry, it's a bit unpred= ictable what i'm doing these days but the=0Aare more transmit stations on= 8.27 kHz. Also i will come back of=0Acourse. And by this way i keep the = center frequency 8.27 kHz free for=0Aother TX stations. I can try to deco= de EbNaut on 8.27 when transmitting=0Aon 6.47 during the same time.
=0A=
=0A
=0A
=0A

=0A
=0A
= I passed the last nights to try to discipline my audio board=0Awith my 1p= ps GPS... nothing to do, I've tried all, levels, phases,=0Aetc... I follo= wed the Wolf's tutorial without success. I suppose duty=0Acycle is to low= . I'm waiting for a new GPS so I'll try with that or in=0Athe worst case = with an OCXO+GPS 10khz.
=0A
=0A
=0A
=0ADid= you watch the signal on the oscilloscope and on the scope of=0ASpecLab? = I need more precise infos to give some advice, maybe a capture=0Aof the s= cope and the schematic how you coupled the module to the input.
=0A=0A
=0A
=0A
So only for test now I'm pointi= ng to German LF station DHO.=0AInserted BP and NB and moved to about 100u= Hz the resolution of the=0Agrabber.
=0A
=0A
=0ADi= d you enable "1 pixel per FFT bin"? That would be recemmended.
=0A=0A
=0A

=0A
=0A
Tomorrow a lit= tle trip, not so far, to an Ham friend to listen=0Aif his zone is quieter= than where I live.
=0A
=0A=0AUFB!
=0A=0A
=0A

=0A
=0A
I'm interested to= your Raspberry Pi remote system, can we get=0Amore informations?
=0A=
=0A=0AWow, of course that is a large project and i c= ould write for hours. But=0Aa rough overview should be no problem:
=0A= -The Raspi 2B is used
=0A-I'm using a 2.4 GHz link, with this yagi=0A<= a class=3D"moz-txt-link-freetext" href=3D"http://www.brennpunkt-srl.de/es= hop/product_info.php?products_id=3D188" _djrealurl=3D"http://www.brennpun= kt-srl.de/eshop/product_info.php?products_id=3D188">http://www.brennpunkt= -srl.de/eshop/product_info.php?products_id=3D188=0Aover a distance of= 3.5 km in combination with USB WLAN Sticks (ALFA=0AAWUS036NEH running in= 'g' mode) connected to the Raspi.
=0A-Two stereo USB soundcards are c= onnected to the Raspi, one for MF, the=0Aother for VLF. The samplerate is= 48 kS/s.
=0A-The radio signals of MF are converted to a range of the = soundcard=0A(0...24 kHz), VLF comes in directly.
=0A-Darkice and Iceca= st2 software is running as a web radio, vorbis stereo=0Astream. Each ster= eo stream needs 20% CPU power, about.
=0A-For VLF, i'm using the right= channel to transfer 1 pps + NMEA signals=0Afrom a cheap GPS module (13 =E2= =82=AC) which consumes just 40 mA at 3.3V. This=0Aallows to get an ultra = stable signal which is necessary for the 47 uHz=0Awindow.
=0A-On the o= ther end, SpecLab is playing the stream from it's IP adress,=0Agenerates = the first spectrogram ('wideband' on the top of the page=0Ahttp://www.iup.uni-heidelberg.de/s= chaefer_vlf/DK7FC_VLF_Grabber2.html )=0Aand feeds the audio signal to= VAC1. All other SL instances take the=0Aaudio signal from VAC1 then, so = the stream has just one client.
=0A-There is a battery voltage and cur= rent monitoring so i can all the=0Atime monitor the energy situation on t= he tree. The curves are displayed=0Aat=0Ahttp://www.iup.uni-heidelberg.de/schae= fer_vlf/DK7FC_remote_Grabber_tech.html=0A(I nned to cut some branches= because the sun is now shining from a=0Ahigher angle, so there is some s= hadow on the solar modules in the=0Aafternoon. But i don't want to cut th= em :-) In winter it is no=0Aproblem...)
=0A-There are additional circu= its for protecting the batteries from deep=0Adischarges and there is a ho= memade accu charger that has a temperature=0Aregulated cutoff voltage.=0A-Currently 2 solar modules, 50Wp each, are used. And 3 lead gel accus= =0A12V/18Ah.
=0A- So far i prefer loop antennas for MF and VLF. Two or= thogonal loops=0Afor each band, allowing RDF spectrograms. MF is running = at=0Ahtt= p://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_remote_RDF_Grabber.html<= /a>=0A, VLF is not so easy in RDF because the second channel is occupied = by=0Apps+NMEA. But there must be a solution!
=0A- In previous versions= of the system i used a bistabile relay to switch=0Aantennas remotely. Th= at worked very well.
=0A-The power consumption of the system is about = 3W now since two=0Asoundcards + the GPS module + 40% CPU power is = running permanently.
=0A--------
=0A
=0ADon't know if you alread= y started to play with the Raspi or if you are=0Askilled in Linux. I spen= t dozens of hours to get it running as it is=0Anow. But there were great = success moments many times. And i find the=0Asystem availability is quite= good, better then expected in the=0Abeginning.
=0AI don't want to mis= s the project a single day :-)
=0A
=0A73, GL, Stefan
=0A
=0A<= blockquote cite=3D"mid:O6RYFA$A2E46C5D83527136F56334B1871AE185@ik0vve.net= " type=3D"cite">=0A
=0A

=0A
=0A
Thanks, 73,= Max IK0VVE
=0A
=0A
=0A=0A=0A=0A
--_=__=_XaM3_.1463169450.2A.341063.42.1975.52.42.007.285422313--