Return-Path: X-Spam-DCC: paranoid 1480; Body=3 Fuz1=3 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE,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 u8ULLJnJ014589 for ; Fri, 30 Sep 2016 23:21:19 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bq5C5-0000li-8Q for rs_out_1@blacksheep.org; Fri, 30 Sep 2016 22:18:09 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bq5C4-0000lV-LA for rsgb_lf_group@blacksheep.org; Fri, 30 Sep 2016 22:18:08 +0100 Received: from mail-yw0-x231.google.com ([2607:f8b0:4002:c05::231]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1bq5C2-0004Jw-K7 for rsgb_lf_group@blacksheep.org; Fri, 30 Sep 2016 22:18:07 +0100 Received: by mail-yw0-x231.google.com with SMTP id i129so76656132ywb.0 for ; Fri, 30 Sep 2016 14:18:06 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=4LlzgqoP6iEOnMz2WZyJgN9vI4A2kn5UKTc+oKOYtug=; b=rC+7nqObOMw4vAJegRGG4IxO8g+xYU+2noM5WHdxQvv7ZD3g7Shpr9CySI6XG2Rsqo XOktQxHTdVTmLiPu6FztUl0KIFDyIE7pUVKoo35zHLv7T+hphhKjtGwZArdPn6YTRFdl l+HHnfxFH1P0P3gqIgWQ6wXOJN7Q0qxoBU3uKvRYFx+M+v18NNTcHQeMRWV/iyLh3hiA DAamBmxC4nu3uPD1twUYxg/YV/TsDtSKoW0M6hXksgep/ea/Wic4sAcTIRq2XlPqisdM 3+P9sW3kGxKqAetqe6rklrpF1eC2kHG1fCzv8ymI95b9J4uz7+jeuHbhGSc2JB7GF1RS 1L0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=4LlzgqoP6iEOnMz2WZyJgN9vI4A2kn5UKTc+oKOYtug=; b=TVN/vM8pd7rn1OflP9NlthsLb4k/7YAUNpwtSWAu4Kgfl54C2VM829FIVrCPP4e5OO hdr4+EjXLG/YzhPJWpW7fkb77/eqb7vTM3S7/wf7Zn9bQw1bIPqgqkzEKh/rnbi/gB63 5xksZ3P4OjCOydStU3xqZSJz+cxucIgsoQkOvpMLyYLxS6wW7IF3UN0TAzAg6HFudFZz EST37owhlcFT6pKOqq8zYmxrFtJu9jIxbfrHU2JZj6WAccySvzpd/DuDO7jxRgOH49FQ QAvGMVd/ODLhiBDd+7ai33Z3blrt1k/gNjl4jGXz3Za29FwO7pawV3hexTDaLhQ6Pyv6 w50A== X-Gm-Message-State: AA6/9RmMxy58F2lpg00jIqXhqDG6mF8zFgUoZ6Qp07m0qDodKMuVDNpcppYxmz+/9EAZt5nQAtXCoo7xENOBnQ== X-Received: by 10.129.32.212 with SMTP id g203mr6096207ywg.277.1475270284813; Fri, 30 Sep 2016 14:18:04 -0700 (PDT) MIME-Version: 1.0 Received: by 10.37.124.65 with HTTP; Fri, 30 Sep 2016 14:18:04 -0700 (PDT) In-Reply-To: References: From: Roger Lapthorn Date: Fri, 30 Sep 2016 22:18:04 +0100 Message-ID: To: "rsgb_lf_group@blacksheep.org" X-Scan-Signature: af51d4375c088ae0fd739df304e30189 Subject: Re: LF: good night on MF WSPR @G7NKS 1933km @ 50mW erp - winter plans Content-Type: multipart/alternative; boundary=001a1141cb24462a91053dc0218f 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: 8889 --001a1141cb24462a91053dc0218f Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Well done Jim. You sound pretty organised this season! 73s Roger G3XBM On 25 September 2016 at 08:11, James Cowburn wrote: > Prop'n seems to be improving. Iceland and Finland last night on MF, > nearly 2000km on about 50mW ERP. > > > > Roll on the cold dark nights! > > > > Simple set up @ G7NKS > > > > IC706mk2g via current meter and home brew 7 pole LPF into coax out some > 15m to a tapped loading coil into an inverted L (12m high on a fibreglass > telescopic pole and 30m top wire across roof) > > > > Earthing via a mish-mash of stakes & bonding to oil tank feeder pipe > (buried) and some steel mesh under patio slabs and block paved drive. > > > > Checking via the RigExpert AA1000 analyser shows an impedance of 52 ohm > and a return loss of -25dB @ 474.2khz. For the local IO92 and Newark > Sunday morning net with G3XIZ, M0JXM, G3DXZ, G4GIR occasionally and M0FMT= , > we use around 473.3khz and this occassionally warrants a quick tap up or > down by half a turn. Also when it rains like today, there's a tweak need= ed > sometimes as the top wire capacitance to roof changes as it becomes more > electrolytic and less air spaced! > > > > PC is a Dell Studio 1749 running WSPR 2.12. > > > > The IC706mk2G will run at about 25% max power on 472 so about 25w but not > all of that is at 472 of course, I estimate I'm getting 50mW ERP using a > very helpful spreadsheet/calc provided by Stefan. > > > > On a 15% duty cycle it all remains happily cool. > > > > It does have a tendency to fight with our cheap home broadband router > supplied by British Telecom, resulting in the "Orange Light of Death" and > subsequent grief from XYL and 2 teenagers as their Netflix/Music > stream/Online gaming has just fallen over! Ferrite toroids have been > spectacularly unsuccessful in remedying this. The best solution has been > to try to run the CAT5 cables in my office as perpendicular to the coax > feed and line of roof top wire as possible to minimise pick up and cross > talk, but this hasn't really been that effective either. > > > > A bigger issue on Rx is the noise pick up from both Dell (genuine kit an= d > not cheap copies either, which is annoying!) PSUs that feed the Studio a= nd > the XPS17 which is my main office PC. On batteries, I get about S1-3 of > noise which is very good, but as soon as the PSU's are used and are under > "load" then this rockets up to S7-9! If they are powered on, but not > driving the laptops i.e. disconnected, then they have no impact. I'm > wondering if it is the load that makes them noisier or whether the whole > laptop acts as an augmented antenna when they are connected to it? > > > > I've tried putting them in shielded earthed metal boxes (biscuit tins!) > with no effect. (biscuits were nice though!). Similarly, stacked ferrite > toroids on the mains inputs and DC power out have had zero impact. They > both have a very bright blue LED on the power cable whereas older units f= or > my Dell D610/20 series did not have this "bauble" and were much quieter, > but also were lower rated at 60W or 90W as opposed to these beasts which > are around 120W to 150W, and run alarmingly warm at times! > > > > The Rx noise doesn't seem to affect my WSPR reception but it does impact > on me hearing G3DXZ (Chas) from Newark on the Sunday Net, so for that I > just run the show on batteries during the Rx overs. > > > > When I get "a round Tuit" I am going to follow the very detailed > instructions from John in the US and feed the 706 into my recently > acquired Hafler Transnova 3000 (approx 400w). Cheers John. > > > > While I will unlikely get 400W I suspect I might get 250W which is 10dB u= p > on my current input power and hopefully about 500mW ERP and that may be > enough to hop the pond. > > > > As for 137KHz and down=E2=80=A6=E2=80=A6. > > > > The 706 will generate a very weak signal at 137 probably only around 1mW > but if I can get that into the Hafler then that=E2=80=99s my net project,= work and > weather permitting. I acquired some coils from the SK estate of the late > great G3ACQ and they will happily resonate my "L" onto LF. > > > > My other (better) plan is to use the 0dBm output on my Elad FDM Duo and a > 1W broadband RF amp off Ebay to give me 1W output at 137 and feed that > into the Hafler, so plenty to do. > > > > The ELAD will also go down to sub 9Khz on the 0dBm output so I may try to > re-start my dreaming experiments and also try some of Roger G3XBM earth > loop electrode arrangements > > > > The local 472 net nr to IO92ub will be on air from about 9am local today > and most Sundays so feel free to join in! > > > > Chris G3XIZ is usually "Net Controller" and "chief documenter". > > > > Best 73s > > > > Jim > > > > > > Dr. Jim Cowburn G7NKS IO92ub > > > > > --001a1141cb24462a91053dc0218f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Well done Jim. You sound pretty organised this s= eason!

73s
Roger G3XBM

On 25 September 2016 at 08:11, James C= owburn <jim.cowburn@outlook.com> wrote:

Prop'n seems to be improving. =C2=A0<= /u>Iceland and Finland last night on MF, nearly 2000km on abou= t 50mW ERP.

=C2=A0

Roll on the cold dark nights!<= /span>

=C2=A0

Simple set up @ G7NKS

=C2=A0

IC706mk2g via current meter and home brew 7 = pole LPF into coax out some 15m to a tapped loading coil into an inverted L= (12m high on a fibreglass telescopic pole and 30m top wire across roof)

=C2=A0

Earthing via a mish-mash of stakes & bon= ding to oil tank feeder pipe (buried) and some steel mesh under patio slabs= and block paved drive.

=C2=A0

Checking via the RigExpert AA1000 analyser s= hows an impedance of 52 ohm and a return loss of -25dB @ 474.2khz. =C2=A0= =C2=A0For the local IO92 and Newark Sunday morning net with G3XIZ, M0JXM, G3DXZ, G4GIR occasionally and M0FMT, we use around = 473.3khz and this occassionally warrants a quick tap up or down by half a t= urn.=C2=A0 Also when it rains like today, there's a tweak needed someti= mes as the top wire capacitance to roof changes as it becomes more electrolytic and less air spaced!<= /font>

=C2=A0

PC is a Dell Studio 1749=C2=A0 running WSPR = 2.12.

=C2=A0

The IC706mk2G will run at about 25% max powe= r on 472 so about 25w but not all of that is at 472 of course, I estimate I= 'm getting 50mW ERP using a very helpful spreadsheet/calc provided by Stefan. =C2=A0

=C2=A0

On a 15% duty cycle it all remains happily c= ool.

=C2=A0

It does have a tendency to fight with our ch= eap home broadband router supplied by British Telecom, resulting in the &qu= ot;Orange Light of Death" and subsequent grief from XYL and 2 teenagers as their Netflix/Music stream/Online gaming has j= ust fallen over! =C2=A0=C2=A0=C2=A0Ferrite toroids have been spectacularly = unsuccessful in remedying this.=C2=A0 The best solution has been to try to = run the CAT5 cables in my office as perpendicular to the coax feed and line of roof top wire as possible to minimise pick up an= d cross talk, but this hasn't really been that effective either.=

=C2=A0

A bigger issue on Rx is the noise=C2=A0 pick= up from both Dell (genuine kit and =C2=A0not cheap copies either, which is= annoying!) PSUs that feed the Studio and the XPS17 which is my main office PC. On batteries, I get about S1-3 of noise which = is very good, but as soon as the PSU's are used and are under "loa= d" then this rockets up to S7-9!=C2=A0 If they are powered on, but not= driving the laptops i.e. disconnected, then they have no impact. =C2=A0=C2=A0=C2=A0I'm wondering if it is the load that make= s them noisier or whether the whole laptop acts as an augmented antenna whe= n they are connected to it?

=C2=A0

I've tried putting them in shielded eart= hed metal boxes (biscuit tins!) with no effect. (biscuits were nice though!= ).=C2=A0 Similarly, stacked ferrite toroids on the mains inputs and DC power out have had zero impact.=C2=A0 They both ha= ve a very bright blue LED on the power cable whereas older units for my Del= l D610/20 series did not have this "bauble" and were much quieter= , but also were lower rated at 60W or 90W as opposed to these beasts which are around 120W to 150W, and run alarmingly warm at = times!

=C2=A0

The Rx noise doesn't seem to affect my W= SPR reception but it does impact on me hearing G3DXZ (Chas) from Newark on the Sunday Net, so for that I just ru= n the show on batteries during the Rx overs.

=C2=A0

When I get "a round Tuit" I am goi= ng to follow the very detailed instructions from John in the US and feed the 706 into my recently acquired H= afler Transnova 3000=C2=A0 (approx 400w). =C2=A0=C2=A0Cheers John.

=C2=A0

While I will unlikely get 400W I suspect I m= ight get 250W which is 10dB up on my current input power and hopefully abou= t 500mW ERP and that may be enough to hop the pond.

=C2=A0

As for 137KHz and down=E2=80=A6=E2=80=A6.=

=C2=A0

The 706 will generate a very weak signal at = 137 probably only around 1mW but if I can get that into the Hafler then tha= t=E2=80=99s my net project, work and weather permitting. =C2=A0I acquired some coils from the SK estate of the late great G3ACQ and= they will happily resonate my "L" onto LF.

=C2=A0

My other (better) plan is to use the 0dBm ou= tput on my Elad FDM Duo and a 1W broadband RF amp off Ebay =C2=A0to give me= 1W output at 137 and feed that into the Hafler, so plenty to do.

=C2=A0

The ELAD will also go down to sub 9Khz on th= e 0dBm output so I may try to re-start my dreaming experiments and also try= some of Roger G3XBM earth loop electrode arrangements

=C2=A0

The local 472 net nr to IO92ub will be on ai= r from about 9am local today and most Sundays so feel free to join in!

=C2=A0

Chris G3XIZ is usually "Net Controller&= quot; and "chief documenter".=C2=A0

=C2=A0

Best 73s=C2=A0

=C2=A0

Jim

=C2=A0

=C2=A0

Dr. Jim Cowburn=C2=A0 G7NKS= =C2=A0=C2=A0 IO92ub

=C2=A0

=C2=A0


--001a1141cb24462a91053dc0218f--