Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.1 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_HOTMAIL_RCVD,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 u8P7FAQu027719 for ; Sun, 25 Sep 2016 09:15:11 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bo3ax-0000EI-6S for rs_out_1@blacksheep.org; Sun, 25 Sep 2016 08:11:27 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bo3aw-0000E8-H1 for rsgb_lf_group@blacksheep.org; Sun, 25 Sep 2016 08:11:26 +0100 Received: from snt004-omc4s17.hotmail.com ([65.55.90.220]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-SHA384:256) (Exim 4.87) (envelope-from ) id 1bo3at-0007Fl-VB for rsgb_lf_group@blacksheep.org; 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x-ms-office365-filtering-correlation-id: e7731837-0b68-467e-6100-08d3e51324e5 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(1601124038)(1603103081)(1601125047);SRVR:AM5EUR03HT171; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(432015012)(82015046);SRVR:AM5EUR03HT171;BCL:0;PCL:0;RULEID:;SRVR:AM5EUR03HT171; x-forefront-prvs: 0076F48C8A spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-originalarrivaltime: 25 Sep 2016 07:11:19.8232 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM5EUR03HT171 X-OriginalArrivalTime: 25 Sep 2016 07:11:20.0975 (UTC) FILETIME=[0478A1F0:01D216FC] X-Scan-Signature: b266e01efe570cc7cc73d9fd75b218c3 Subject: LF: good night on MF WSPR @G7NKS 1933km @ 50mW erp - winter plans Content-Type: multipart/alternative; boundary="_000_DB6PR1001MB13200141A0EF720C5DE601A4ECCA0DB6PR1001MB1320_" 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: 8839 --_000_DB6PR1001MB13200141A0EF720C5DE601A4ECCA0DB6PR1001MB1320_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable 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 tele= scopic pole and 30m top wire across roof) Earthing via a mish-mash of stakes & bonding to oil tank feeder pipe (burie= d) 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 h= alf a turn. Also when it rains like today, there's a tweak needed sometime= s as the top wire capacitance to roof changes as it becomes more electrolyt= ic 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 a= ll of that is at 472 of course, I estimate I'm getting 50mW ERP using a ver= y 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 suppl= ied by British Telecom, resulting in the "Orange Light of Death" and subseq= uent grief from XYL and 2 teenagers as their Netflix/Music stream/Online ga= ming has just fallen over! Ferrite toroids have been spectacularly unsuc= cessful in remedying this. The best solution has been to try to run the CA= T5 cables in my office as perpendicular to the coax feed and line of roof t= op wire as possible to minimise pick up and cross talk, but this hasn't rea= lly been that effective either. A bigger issue on Rx is the noise pick up from both Dell (genuine kit and = not 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 no= ise which is very good, but as soon as the PSU's are used and are under "lo= ad" 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 i= f it is the load that makes them noisier or whether the whole laptop acts a= s an augmented antenna when they are connected to it? I've tried putting them in shielded earthed metal boxes (biscuit tins!) wit= h no effect. (biscuits were nice though!). Similarly, stacked ferrite toro= ids on the mains inputs and DC power out have had zero impact. They both h= ave a very bright blue LED on the power cable whereas older units for my De= ll D610/20 series did not have this "bauble" and were much quieter, but als= o were lower rated at 60W or 90W as opposed to these beasts which are aroun= d 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 instructio= ns from John in the US and feed the 706 into my recently acquired Hafler Tr= ansnova 3000 (approx 400w). Cheers John. While I will unlikely get 400W I suspect I might get 250W which is 10dB up = on my current input power and hopefully about 500mW ERP and that may be eno= ugh to hop the pond. As for 137KHz and down=85=85. The 706 will generate a very weak signal at 137 probably only around 1mW bu= t if I can get that into the Hafler then that=92s my net project, work and = weather permitting. I acquired some coils from the SK estate of the late g= reat 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 1= W 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 r= e-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 an= d 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 --_000_DB6PR1001MB13200141A0EF720C5DE601A4ECCA0DB6PR1001MB1320_ Content-Type: text/html; charset="Windows-1252" Content-ID: Content-Transfer-Encoding: quoted-printable

Prop'n seems to be improving.  Iceland and Finland<= /st1:country-region> 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 int= o coax out some 15m to a tapped loading coil into an inverted L (12m high o= n 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 p= aved drive.

 

Checking via the RigExpert AA1000 analyser shows an impe= dance 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 t= urn.  Also when it rains like today, there's a tweak needed 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 5= 0mW 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 bro= adband router supplied by British Telecom, resulting in the "Orange Li= ght of Death" and subsequent grief from XYL and 2 teenagers as their Netflix/Music stream/Online gaming has j= ust 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 an= d cross talk, but this hasn't really been that effective either.=

 

A bigger issue on Rx is the noise  pick up from bot= h Dell (genuine kit and  not 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 "load&qu= ot; then this rockets up to S7-9!  If they are powered on, but not dri= ving the laptops i.e. disconnected, then they have no impact.    I'm wondering if it is the load that makes th= em noisier or whether the whole laptop acts as an augmented antenna when th= ey are connected to it?

 

I've tried putting them in shielded earthed metal boxes = (biscuit tins!) with no effect. (biscuits were nice though!).  Similar= ly, stacked ferrite toroids on the mains inputs and DC power out have had zero impact.  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!

 

The Rx noise doesn't seem to affect my WSPR reception bu= t 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 250= W which is 10dB up on my current input power and hopefully about 500mW ERP = and that may be enough to hop the pond.

 

As for 137KHz and down=85=85.

 

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=92s 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 E= lad FDM Duo and a 1W broadband RF amp off Ebay  to give me 1W output a= t 137 and feed that into the Hafler, so plenty to do.

 

The ELAD will also go down to sub 9Khz on the 0dBm outpu= t so I may try to re-start my dreaming experiments and also try some of Rog= er 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 &q= uot;chief documenter". 

 

Best 73s 

 

Jim

 

 

Dr. Jim Cowburn  G7NKS   IO9= 2ub

 

 

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