Delivered-To: daveyxm@virginmedia.com Received: by 10.50.96.198 with SMTP id du6csp121142igb; Sun, 20 Oct 2013 20:32:25 -0700 (PDT) X-Received: by 10.181.12.75 with SMTP id eo11mr7934026wid.24.1382326343855; Sun, 20 Oct 2013 20:32:23 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id d15si3800118wic.56.2013.10.20.20.32.23 for ; Sun, 20 Oct 2013 20:32:23 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org; dkim=fail header.i=@rocketmail.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VY5o7-0004OI-Eq for rs_out_1@blacksheep.org; Mon, 21 Oct 2013 04:05:27 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VY5np-0004O7-J2 for rsgb_lf_group@blacksheep.org; Mon, 21 Oct 2013 04:05:09 +0100 Received: from nm16.bullet.mail.bf1.yahoo.com ([98.139.212.175]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VY5nl-0003LW-TM for rsgb_lf_group@blacksheep.org; Mon, 21 Oct 2013 04:05:07 +0100 Received: from [98.139.215.141] by nm16.bullet.mail.bf1.yahoo.com with NNFMP; 21 Oct 2013 03:05:03 -0000 Received: from [98.139.212.224] by tm12.bullet.mail.bf1.yahoo.com with NNFMP; 21 Oct 2013 03:05:03 -0000 Received: from [127.0.0.1] by omp1033.mail.bf1.yahoo.com with NNFMP; 21 Oct 2013 03:05:03 -0000 X-DKIM-Result: Domain=rocketmail.com Result=Signature OK X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 408024.9628.bm@omp1033.mail.bf1.yahoo.com Received: (qmail 11600 invoked by uid 60001); 21 Oct 2013 03:05:03 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rocketmail.com; s=s1024; t=1382324703; bh=pHJL6anHmzm7o+K9RGgJ5A1v1IPRmo9WcDMdJI6iizU=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=BnSTMZ8m3vqLe1q0i+t6dxCYTOhi37eRawVygBaaQ4Gredvsc65bcKC5gtkgQ1XC42qnCW9gX6ULte/rkZYtve4lkWPJWBpW4HP+17H9H/mznvjVP5HNREKQ+QpR1nfDmSPpUlqHjW7dEJMheep8jbl2nl0ykp+t5MfAnHsMhFw= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=rocketmail.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=bv8m3Ki43lDJ3006UXRQD7BSo/GTjQWa2Wt4D6EUiO30Y+XniluXQ3hllcnDS8xnWzja728Wf+/6P7CJsx38Ugw0PO4uPWGEPQymumKa4RZvXPeGAxdM/rwFiVFJVQq3BELNrrMMaKcOAYwvAs7VXeVPJXZE2N129iuBhy3yuaU=; X-YMail-OSG: wsjj6AUVM1mwLK7JpOnn65frGnVAuFfNxHuZzPyst.7aYXH KlJiLiLfjOjbWTxwUaPFgn_F6rkPU59UQ1l4_CSeoJAa_FBcLH9YdJiNtB6y ewkNm4qYL7WK3QKG1dJtpiSUMm4Ab1RWb2.k_cZuIlcIZpIwwplFU3p9px1t keC4gLGwzMtQJTeIaD.sg3vV8Wi_nMX_g00tfisWrT8GGdOBKXQVUtBPSUgl o6mZySD7lugYxb0Lcc_mdNNzCC.TByee0iVkqeeubRyuM9qhC4OCOQcE3xkL x2eM539SbEXFfVHkU0qf55HdfuQG.Ad5bD2qYBZPxAoaCHEJW6H.7aNk1KHr ciDBuTRFfFCJemq.DNZlhKlnYMdRdQWlXxFyYjjYPgnbXbAckq5d_lnhWCOi 8uRSiP4DEh7FXh2Eb3851mqob4v3a6auU5O9xv2JO3zb2d805cKdnFgVtprI fjVrx7j.eYfSKxS31VvaJq_4gMA3wbgqHf6JcSHXk4hSDBoHIBcT5f0ANCEv Srpvwsbznd9kHs_Yqtf86S2hlhilI_HDM70NndwaWXkdgYMQ4xQJHfwDoATQ f7UvbBdfcdPVH4D6c5MJVh714pumqjt5gW56TlPzMDbRnfcyjmMCrRJFghnb fbcQJcyjujUPCdW14YuXRrpTH3wfclDKIz_ABGY1MhmcUIWyG84L4v3K97iR WLQM.qH6CQE38g5Fe Received: from [75.57.214.12] by web162604.mail.bf1.yahoo.com via HTTP; Sun, 20 Oct 2013 20:05:02 PDT X-Rocket-MIMEInfo: 002.001,U3RlZmFuLArCoApUaGFua3MgZm9yIHRoZSBxdWljayByZXBseSBhbmQgdGhlIGVuY291cmFnZW1lbnQgcmVnYXJkaW5nIG15IGNob2ljZSBvZiB0aGUgSURDLTEzNi7CoCBJdCBpcyBnb29kIHRvIGtub3cgb3RoZXJzIGFyZSB1c2luZyBpdCB3aXRoIHN1Y2Nlc3MuwqAgSXQgc291bmRzIGxpa2UgbW9kaWZpY2F0aW9ucyB0b8KgdGhlIHJlY2VpdmVyIGl0c2VsZiBhcmVuJ3QgcmVhbGx5IG5lY2Vzc2FyeS4KwqAKSSBoYXZlIHRvIGFkbWl0IHRoYXQgSSdtIHJlYWxseSBzdXJwcmlzZWQgYnkgdGhlIGRpc3RhbmMBMAEBAQE- X-Mailer: YahooMailWebService/0.8.160.587 References: <525489E6.4@iup.uni-heidelberg.de> <1382206811.50957.YahooMailNeo@web162606.mail.bf1.yahoo.com> <52632259.2000407@iup.uni-heidelberg.de> Message-ID: <1382324702.11356.YahooMailNeo@web162604.mail.bf1.yahoo.com> Date: Sun, 20 Oct 2013 20:05:02 -0700 (PDT) From: John Lutz To: "rsgb_lf_group@blacksheep.org" In-Reply-To: <52632259.2000407@iup.uni-heidelberg.de> MIME-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. 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: Stefan, Thanks for the quick reply and the encouragement regarding my choice of the IDC-136. It is good to know others are using it with success. It sounds like modifications to the receiver itself aren't really necessary. I have to admit that I'm really surprised by the distances being achieved at 136 KHz. I would have expected that a couple hundred miles would be the upper limit, and that even that far would be pretty infrequent. After looking at the WSPRNet database, I can see that I was very mistaken about that. I see lots of reception reports from you for G3XKR (940km), R7NT (2234 km), 4X1RF (2850 km), and many other distant stations. I would never have thought this possible! :-) Regarding my antenna, I will initially use a 7.25 meter ground-mounted vertical. Normally, I use it for 30-meter operation. I am in the process of constructing a PA0RDT mini-whip. I understand that "active" antennas of this type are fairly popular of LF/VLF work. Again, thank you for taking time to respond to my email. I hope to be WSPRNet active very soon. 73, John / N9JL [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [98.139.212.175 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (n9jl[at]rocketmail.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 54c274b8b0f8da777e8f702c98fe24ad Subject: Re: LF: WSPR 15 tonite Content-Type: multipart/alternative; boundary="1866672204-514293340-1382324702=:11356" 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=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: 3334 --1866672204-514293340-1382324702=:11356 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Stefan,=0A=A0=0AThanks for the quick reply and the encouragement regarding = my choice of the IDC-136.=A0 It is good to know others are using it with su= ccess.=A0 It sounds like modifications to=A0the receiver itself aren't real= ly necessary.=0A=A0=0AI have to admit that I'm really surprised by the dist= ances being achieved=A0at 136 KHz.=A0 I=A0would have expected that=A0a coup= le=A0hundred miles would be=A0the upper limit, and that even that far=A0wou= ld=A0be pretty infrequent.=A0 After looking at=A0the WSPRNet database, I ca= n see that=A0I was very mistaken about that.=0A=A0=0AI see lots of=A0recept= ion reports from you for G3XKR (940km),=A0R7NT (2234 km), 4X1RF (2850 km), = and many other distant=A0stations.=A0 I would never have thought this possi= ble!=A0=A0 :-)=0A=A0=0ARegarding my antenna, I will initially use a=A07.25 = meter ground-mounted vertical.=A0 Normally, I use it=A0for 30-meter operati= on.=A0 I am in the process of constructing a PA0RDT mini-whip.=A0 I underst= and that "active" antennas of this type are fairly popular of LF/VLF work.= =0A=A0=0AAgain, thank you for taking time to respond to my email.=A0 I hope= to be WSPRNet active very soon.=0A=A0=0A73,=0A=A0=0AJohn / N9JL=0A=A0=0A= =0A=0A=0AOn Saturday, October 19, 2013 7:24 PM, Stefan Sch=E4fer wrote:=0A =0AHello John,=0A=0AGood decision!= LF is the real challenge and as you can see here, 160m=0Ais certainly not = "Top Band" ;-)=0A=0AThe IDC-136 receiver is used with great results. It is = used by YV7MAE,=0ATF3HZ, Edgar J. Twining=A0 (SWL, VK7) and many more stati= ons. Stability=0Ais fine for WSPR-15. Got a decode by YV7MAE last season ov= er 7800 km=0Adistance=0A(https://dl.dropboxusercontent.com/u/19882028/LF/WS= PR15_LF_15022013.png).=0AAnd BTW the manufactorer of the RX is also member = of this reflector :-)=0A=0AI guess the sensitivity and dynamic range is com= pletely sufficient for=0AEN51VM. Proven useful modifications can be done on= the RX antenna for=0Amost radio stations. A cleaner earth or a better deco= upling to the=0Anoisy shack for example. =0AWhat kind of antenna do you int= ed to connect?=0A=0A73 and good luck on LF!=0A=0AStefan/DK7FC=0A=0A=0AAm 19= .10.2013 20:20, schrieb John Lutz: =0AGents, =0A>=A0 =0A>Please forgive me = if this isn't the correct way or place=0Ato ask the following question, but= I've pretty much exhausted all other=0Apossibilities... =0A>=A0 =0A>After = almost 40 years of HF DXing, I finally decided to=0Atry QRSS and WSPR recep= tion on 137 KHz.=A0 Knowing that my stock=A0FT-920=0Aisn't the best at freq= uency=A0stability, I decided to find=A0a dedicated=0Arig -=A0something=A0si= mple, inexpensive, and yet stable enough to serve=A0the=0Aintended purpose.= =A0=A0I chose the IDC-136II direct conversion "receiver"=0Afrom ICAS Enetrp= rises in Tokyo.=A0 I put the quote marks around the word receiver,=0Abecaus= e the unit is really just a down-converter, with the lower mixing=0Aproduct= at audio frequencies. =0A>=A0 =0A>I've=A0read that people (VK2XV and other= s) have devised=0Amodifications for the IDC-136II, but I haven't been able = to get any=0Adetails.=A0=A0I'm wondering if anyone here=A0is using one of= =0Athese units, and (if so) what their experience with it has been. I'm=0Ae= specially interested in chasing down details on any modifications that=0Aha= ve proven useful for enhancing dynamic range or sensitivity. =0A>=A0 =0A>Th= anks very much. =0A>=A0 =0A>John N9JL =0A>EN51vm =0A>=0A>=0A>=0A>On Tuesday= , October 8,=0A2013 5:43 PM, Stefan Sch=E4fer mailto:Stefan.Schaefer@iup.un= i-heidelberg.de wrote:=0A> =0A>LF,=0A>=0A>tonite i'm back in WSPR-15 until= 06:15 UTC.=0A>Reports welcome.=0A>=0A>73, Stefan/DK7FC=0A>=0A>=0A>=0A> = --1866672204-514293340-1382324702=:11356 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Stefan,
 
=
Thanks for the quick reply and the encouragement regarding my ch= oice of the IDC-136.  It is good to know others are using it with succ= ess.  It sounds like modifications to the receiver itself aren't = really necessary.
 
I ha= ve to admit that I'm really surprised by the distances being achieved = at 136 KHz.  I would have expected that a couple hundre= d miles would be the upper limit, and that even that far would&nb= sp;be pretty infrequent.  After looking at the WSPRNet database, = I can see that I was very mistaken about that.
=  
I see lots of reception reports from you for G3XKR (940km), R7NT (2234 km), 4X1RF (2850 km), and many= other distant stations.  I would never have thought this possibl= e!   :-)
 
Reg= arding my antenna, I will initially use a 7.25 meter ground-mounted ve= rtical.  Normally, I use it for 30-meter operation.  I am in= the process of constructing a PA0RDT mini-whip.  I understand that "a= ctive" antennas of this type are fairly popular of LF/VLF work.
 
Again, thank you for taking time = to respond to my email.  I hope to be WSPRNet active very soon.=
 
73,
<= /span> 
John / N9JL
 


On Sa= turday, October 19, 2013 7:24 PM, Stefan Sch=E4fer <Stefan.Schaefer@iup.= uni-heidelberg.de> wrote:
=0AHello John,
=0A=0AGood decision! LF is the real challenge and as you can s= ee here, 160m=0Ais certainly not "Top Band" ;-)
=0A
=0AThe IDC-136 receiver is used with great results. It is used= by YV7MAE,=0ATF3HZ, Edgar J. Twining  (SWL, VK7) and many more statio= ns. Stability=0Ais fine for WSPR-15. Got a decode by YV7MAE last season ove= r 7800 km=0Adistance=0A(https://dl.dropboxuserc= ontent.com/u/19882028/LF/WSPR15_LF_15022013.png).=0AAnd BTW the manufac= torer of the RX is also member of this reflector :-)
=0A<= br clear=3D"none">=0AI guess the sensitivity and dynamic range is completel= y sufficient for=0AEN51VM. Proven useful modifications can be done on the R= X antenna for=0Amost radio stations. A cleaner earth or a better decoupling= to the=0Anoisy shack for example.
=0AWhat kind of anten= na do you inted to connect?
=0A
=0A73 a= nd good luck on LF!
=0A
=0AStefan/DK7FC=
=0A
=0A
=0AAm 19.10.= 2013 20:20, schrieb John Lutz:=0A
=0A
=0A
Gents,
=0A
&n= bsp;
=0A
Please forgive me if this isn't the correct way o= r place=0Ato ask the following question, but I've pretty much exhausted all= other=0Apossibilities...
=0A
 
= =0A
After almost 40 years of HF DXing, I finally decided to=0At= ry QRSS and WSPR reception on 137 KHz.  Knowing that my stock FT-= 920=0Aisn't the best at frequency stability, I decided to find a = dedicated=0Arig - something simple, inexpensive, and yet stable e= nough to serve the=0Aintended purpose.  I chose the IDC-136I= I direct conversion "receiver"=0Afrom ICAS Enetrprises in Tokyo.  I pu= t the quote marks around the word receiver,=0Abecause the unit is re= ally just a down-converter, with the lower mixing=0Aproduct at audio freque= ncies.
=0A
 
=0A
I've&= nbsp;read that people (VK2XV and others) have devised=0Amodifications for t= he IDC-136II, but I haven't been able to get any=0Adetails.  I'm wondering if anyone here is using one of=0Athese units, a= nd (if so) what their experience with it has been. I'm=0Aespecially interes= ted in chasing down details on any modifications that=0Ahave proven useful = for enhancing dynamic range or sensitivity.
=0A
 
=0A
Thanks very much.
=0A
 
=0A
John N9JL
=0A
EN51vm
=0A

=0A
=0A
=0A
=0A
On Tue= sday, October 8,=0A2013 5:43 PM, Stefan Sch=E4fer=0Amailto:Stefan.Schaefer@iup.uni-heidelbe= rg.de wrote:
=0A
=0A
LF,
=0A
= =0Atonite i'm back in WSPR-15 until 06:15 UTC.
=0AReports= welcome.
=0A
=0A73, Stefan/DK7FC
=0A
=0A
=0A
=0A
=0A
=0A
=0A
=0A
=0A
=0A


--1866672204-514293340-1382324702=:11356--