Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk05.r1000.mx.aol.com (Internet Inbound) with ESMTP id B669738000094; Fri, 23 Mar 2012 18:27:23 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SBCw7-0002jT-Ii for rs_out_1@blacksheep.org; Fri, 23 Mar 2012 22:26:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SBCw6-0002jK-SM for rsgb_lf_group@blacksheep.org; Fri, 23 Mar 2012 22:26:18 +0000 Received: from mout2.freenet.de ([195.4.92.92]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SBCw4-0003oc-HC for rsgb_lf_group@blacksheep.org; Fri, 23 Mar 2012 22:26:18 +0000 Received: from [195.4.92.142] (helo=mjail2.freenet.de) by mout2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.76 #1) id 1SBCw3-0005Q4-4u for rsgb_lf_group@blacksheep.org; Fri, 23 Mar 2012 23:26:15 +0100 Received: from localhost ([::1]:35471 helo=mjail2.freenet.de) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1SBCw3-0006hI-10 for rsgb_lf_group@blacksheep.org; Fri, 23 Mar 2012 23:26:15 +0100 Received: from [195.4.92.20] (port=47189 helo=10.mx.freenet.de) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1SBCtL-0006QX-TV for rsgb_lf_group@blacksheep.org; Fri, 23 Mar 2012 23:23:27 +0100 Received: from blfd-4d088af4.pool.mediaways.net ([77.8.138.244]:3656 helo=[192.168.178.22]) by 10.mx.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1:CAMELLIA256-SHA:256) (port 465) (Exim 4.76 #1) id 1SBCtL-00014p-Iv for rsgb_lf_group@blacksheep.org; Fri, 23 Mar 2012 23:23:27 +0100 Message-ID: <4F6CF7DE.70800@freenet.de> Date: Fri, 23 Mar 2012 23:23:26 +0100 From: wolf_dl4yhf User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4F6B09A4.9030705@talktalk.net> <52679836C1244DF48CA5B3153203BBC7@acer> <4F6C390F.6050908@talktalk.net> <8712DA76BC9C47AA904F2DCFB205D411@acer> <4F6C57EE.2010508@talktalk.net> <409A0A913F1148C5B8D3D94CCFC59820@Extensa> <4F6CE24F.2080906@talktalk.net> In-Reply-To: X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Now using Mini Whip here on 8970 Hz in JO33kh, Appingedam Content-Type: multipart/alternative; boundary="------------020804050401090205040807" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE 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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:499748224:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1db4094f6cf8cb1a11 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------020804050401090205040807 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Peter, you could check the calibration later (after the tests on 8.97 kHz) by temporarily switching the spectrogram's center frequency to 11.904761 kHz (Russian 'Alpha' on that frequency is currently active). It's not an ideal check because of the periodic signal -> fence-like spectrum, but maybe the MSK transmitter on 20.9 kHz is not such an ideal source. Anyway I will check it with the GPS-disciplined receiver, if FTA is really 'spot on' frequency. All the best, Wolf DL4YHF . P.S. Suitable GPS receivers (with low jitter on the PPS output) are quite affordable now. I use a Garmin GPS 18x LVC, which is sensivite enough to be operated indoors. It used to be available (or still is) at RS Components and other distributors. The receiver doesn't need to have a 10 kHz output; a low-jitter PPS output (one pulse per second) is sufficient to compensate the soundcard's sampling rate continuously, and provide a very accurate timestamp for other experiments. Am 23.03.2012 23:00, schrieb PA1SDB, Peter: > Hi Eddie, > I have set that 'Sampling rate detector" in SL. > I use 20k9 FTA, the indicator is Green, I have Enabled it. > What els have I to do ???? > I use that Bandpas filter in the left Black box. > 8970 Hz center, 500 Hz width. > Spectrum on L2 > FTT input size is 524288 > Decimal input by is 216 > That gives: > Effect of FFT settings with fs= 48.0000 kHz: > Width of one FFT-bin: 423.855 uHz > Equiv. noise bandwidth: 635.783 uHz > Max freq range: 8.91444 kHz .. 9.02556 kHz > FFT window time: 2359.296 s > Overlap from scroll interval: 87.5 % > I did not callibrate it somehow. On 30 meters / QRSS I use that time > sign on 9996 KHz. I don't know how to callibrate it on VLF. > I can't whistler that stable :-)** > That signal on 8.969,995 has a kund of fading. I hope it's not > something local. > Feel free to inform me if I do somnething totaly wrong ! > No hard feelings :-) > 73's Peter - PA1SDB > > ----- Original Message ----- > *From:* qrss > *To:* rsgb_lf_group@blacksheep.org > > *Sent:* Friday, March 23, 2012 8:51 PM > *Subject:* Re: LF: Now using Mini Whip here on 8970 Hz in JO33kh, > Appingedam > > Peter > > Very good, how is your calibration? Henny is on 8.97000 you have a > line at 8.96995 if it stops at 23.00 that is when Henny is QRT. > > 73 Eddie G3ZJO > > > On 23/03/2012 19:59, PA1SDB, Peter wrote: >> Hello all, >> Today I did plant the "PA0RDT Mini-Whip" antenna in the backyard >> at about 20 meters from the house and 4 meters above ground level. >> Last 2 week I was using 2 pasive loop antenna's who where >> connected direct into the mike input. >> That wasn't a succes... >> I hope to see some results soon :-) >> Take a look at the links below. I did start logging on Friday >> evening at about 19:00 UTC, so perhaps I have to adjust contrast >> later. >> A page on QSL net http://www.qsl.net/pa1sdb or direct to the >> grabber schreen plot http://home.deds.nl/~knol/dream.jpg >> >> 73's, Peter - PA1SDB >> QTH is Appingedam in JO33kh, in the very North- East part of The >> Netherlands. > --------------020804050401090205040807 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Peter,

you could check the calibration later (after the tests on 8.97 kHz) by temporarily switching the spectrogram's center frequency to 11.904761 kHz (Russian 'Alpha' on that frequency is currently active). It's not an ideal check because of the periodic signal -> fence-like spectrum, but maybe the MSK transmitter on 20.9 kHz is not such an ideal source. Anyway I will check it with the GPS-disciplined receiver, if FTA is really 'spot on' frequency.

All the best,
   Wolf DL4YHF .

P.S. Suitable GPS receivers (with low jitter on the PPS output) are quite affordable now. I use a Garmin GPS 18x LVC, which is sensivite enough to be operated indoors. It used to be available (or still is) at RS Components and other distributors. The receiver doesn't need to have a 10 kHz output; a low-jitter PPS output (one pulse per second) is sufficient to compensate the soundcard's sampling rate continuously, and provide a very accurate timestamp for other experiments.


Am 23.03.2012 23:00, schrieb PA1SDB, Peter:
Hi Eddie,
I have set that 'Sampling rate detector" in SL.
I use 20k9 FTA, the indicator is Green, I have Enabled it.
What els have I to do ????
 
I use that Bandpas filter in the left Black box.
8970 Hz center, 500 Hz width.
Spectrum on L2
 
FTT input size is 524288
Decimal input by is 216
 
That gives:
 
Effect of FFT settings with fs= 48.0000 kHz:
Width of one FFT-bin: 423.855 uHz
Equiv. noise bandwidth: 635.783 uHz
Max freq range: 8.91444 kHz .. 9.02556 kHz
FFT window time: 2359.296 s
Overlap from scroll interval: 87.5 %
I did not callibrate it somehow. On 30 meters / QRSS I use that time sign on 9996 KHz. I don't know how to callibrate it on VLF.
I can't whistler that stable :-) 
 
That signal on 8.969,995 has a kund of fading. I hope it's not something local.
 
Feel free to inform me if I do somnething totaly wrong !
No hard feelings :-)
 
 
73's Peter - PA1SDB
 
 
 
----- Original Message -----
From: qrss
Sent: Friday, March 23, 2012 8:51 PM
Subject: Re: LF: Now using Mini Whip here on 8970 Hz in JO33kh, Appingedam

Peter

Very good, how is your calibration? Henny is on 8.97000 you have a line at 8.96995 if it stops at 23.00 that is when Henny is QRT.

73 Eddie G3ZJO


On 23/03/2012 19:59, PA1SDB, Peter wrote:
Hello all,
Today I did plant the "PA0RDT Mini-Whip" antenna in the backyard at about 20 meters from the house and 4 meters above ground level.
 
Last 2 week I was using 2 pasive loop antenna's who where connected direct into the mike input.
That wasn't a succes...
 
I hope to see some results soon :-)
 
Take a look at the links below. I did start logging on Friday evening at about 19:00 UTC, so perhaps I have to adjust contrast later.
A page on QSL net http://www.qsl.net/pa1sdb  or direct to the grabber schreen plot http://home.deds.nl/~knol/dream.jpg
 
73's, Peter - PA1SDB
 
QTH is Appingedam in JO33kh, in the very North- East part of The Netherlands.


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