Return-Path: Received: from mtain-de01.r1000.mx.aol.com (mtain-de01.r1000.mx.aol.com [172.29.64.201]) by air-dd01.mail.aol.com (v129.4) with ESMTP id MAILINDD013-86574cec14a1396; Tue, 23 Nov 2010 14:23:13 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de01.r1000.mx.aol.com (Internet Inbound) with ESMTP id B732A3800012F; Tue, 23 Nov 2010 14:23:10 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PKyRk-0007M0-51 for rs_out_1@blacksheep.org; Tue, 23 Nov 2010 19:22:32 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PKyRj-0007Lr-Fv for rsgb_lf_group@blacksheep.org; Tue, 23 Nov 2010 19:22:31 +0000 Received: from mail-gw0-f43.google.com ([74.125.83.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PKyRg-000752-Hw for rsgb_lf_group@blacksheep.org; Tue, 23 Nov 2010 19:22:31 +0000 Received: by gwb17 with SMTP id 17so5178082gwb.16 for ; Tue, 23 Nov 2010 11:22:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=6rW9SmF/bmc2ux5PD2OEHGd6j0U3emm3PxTFRvURmac=; b=GEfaK5T2Uj7D/MqVGj/NiidMg4dEmH98iGs6zt6mWY+sl++MpumfqqPQKxfSxb/R3t kEIcBaspFqgRcHYv72AJaT9actxU5JzV4hHgRl5oP5SGBuQFfaHDOPGJWjYfWxio+70O odr5C1OcTKOQ2dXSgwtYP32bYGJQt7AAJTEYw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=lVwk04QonmyGbLf7r1qQq9EABGBryuRekNF8ArlVpIuB9wDNncygv1bku237vEQdsM 4LaK9dZZzEPQQTK9WuRJ4wnsJ1nqhcdhE70K/Rd/pJ9eZ1wJ7aWI/6BcNEfiy4UNu+tY hw1p5lHQ07IzS+FTZQrZbUzWbdFzU+tNDSatI= MIME-Version: 1.0 Received: by 10.100.6.7 with SMTP id 7mr5307623anf.256.1290540140855; Tue, 23 Nov 2010 11:22:20 -0800 (PST) Received: by 10.100.58.17 with HTTP; Tue, 23 Nov 2010 11:22:20 -0800 (PST) In-Reply-To: <218719.1584.qm@web28108.mail.ukl.yahoo.com> References: <294616.39798.qm@web28506.mail.ukl.yahoo.com> <218719.1584.qm@web28108.mail.ukl.yahoo.com> Date: Tue, 23 Nov 2010 19:22:20 +0000 X-Google-Sender-Auth: HCLEXKlFElD8QPRKoks5sP1cbOk Message-ID: From: Gary - G4WGT To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126 Subject: Re: LF: VLF G3XIZ - QRT Content-Type: multipart/alternative; boundary=0016e642d3baaa000f0495bd4a36 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_30_40, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE,HTML_TAG_EXISTS_TBODY 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-AUTHENTICATION: mail_rly_antispam_dkim-d260.2 ; domain : gmail.com DKIM : fail x-aol-sid: 3039ac1d40c94cec149e19d4 X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --0016e642d3baaa000f0495bd4a36 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Pete, I read a mail that Chris wrote stating :- >>Hello Rik, >>Thanks for the advice. >>I'll set the DFCW for 60 or even 120 second elements. >>Will that do ? >>73, Chris G3XIZ And in a later mail wrote that his Tx PA blew up after 45 minutes. I hope that helps you. 73 Gary - G4WGT. On 23 November 2010 18:59, M0FMT wrote: > Does anyone know > > a:- What time did the transmission end? Because I have 10s of Mbytes of > recording to backtrack through and I don't want to be looking at the tim= e > when there was no transmission. > > b:- Was he sending a steady carrier or what was sent? Dennis thinks it= was > steady carrier? I think having a regular pulse like an Alpha stations= would > help to identify the carrier through the noise for starters anyway becau= se a > long QRSS or steady carrier is impossible to separate from all the stead= y > QRM carriers when you are unsure of what you are looking for around that > frequency especially at this QTH. It is frustrating to watch a carrier > signal for ages only to find it is QRM. > > 73 es GL petefmt > > I support www.NotSpotTelecom.Com your community Telco / ISP. > > --- On *Tue, 23/11/10, Chris Osborn * wrote: > > > From: Chris Osborn > Subject: Re: LF: VLF G3XIZ - QRT > To: rsgb_lf_group@blacksheep.org > Date: Tuesday, 23 November, 2010, 12:57 > > Hello Stefan / LF, > > All was going last night well until I heard sparking from the aerial > distribution box each > time the carrier was turned off. > > After about 45 minutes the PA FET's blew up. > > I did some investigation and found that the output transformer has > developed some > short-circuited turns and so is now useless. > > The loading coil seems unharmed so once I get a replacement transformer= and > connect in some > new FET's I'll be back in business. > > I'll slow down the rise and fall times of the pulse train from the drive= r > unit to the FET's and hopefully cure the sparking. > > (Mal) > Yes, N.O.V. holders must get prior permission before they transmit and= must > stay by the telephone for the duration. > > Thanks to all those who looked for my signals. > > 73 > Chris G3XIZ > > > > > ------------------------------ > *From:* Stefan Sch=E4fer > *To:* rsgb_lf_group@blacksheep.org > *Sent:* Mon, 22 November, 2010 21:32:28 > *Subject:* Re: LF: VLF G3XIZ - QRT > > Hi Chris, > > Sorry to hear that. Just checked to mails after beeing abscent the weeke= nd > and wanted to wish good luck too now but just read your mail below. > I assume the breakdown immediately de-tuned your system which reduced th= e > HV? So the damage is limited to a few turns? Has it happened at the 0.2m= m > dia wire? > BTW i am using 0.4mm dia wire, so not really much more... > > Good luck in the next tests! > > 73, Stefan > > > Am 22.11.2010 22:15, schrieb Chris Osborn: > > Thanks for looking Roger and chaps but game's over for tonight. > > I've insulation breakdown somewhere in the aerial circuit and I can't fi= x > it until daylight. > > Maybe try again next weekend. > > 73 Chris G3XIZ > > > > ------------------------------ > *From:* Roger Lapthorn > *To:* rsgb_lf_group@blacksheep.org; > Chris Osborn > *Sent:* Mon, 22 November, 2010 20:49:24 > *Subject:* Re: LF: G3XIZ - no copy yet on 8.9719kHz > > Just swapped from the loop to the earth electrode - band noise stronger= - > and there *may* be a hint of a signal on Chris's frequency. > > 73s > Roger G3XBM > > On 22 November 2010 20:21, Roger Lapthorn > > wrote: > > Have been looking for 20 minutes so far but nothing seen from Chris at > about 34km distance. > > Will continue to look for the next 2 hours. > > 73s > Roger G3XBM > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > G3XBM GQRP 1678 ISWL G11088 > > > > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > G3XBM GQRP 1678 ISWL G11088 > > > > --0016e642d3baaa000f0495bd4a36 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Pete,

I read a mail that Chris wrote stating :-

>>Hello= Rik,
>>Thanks for the advice.
>>I'll set the DFCW= for 60 or even 120 second elements.
>>Will that do ?
>>73,=A0Chris G3XIZ

= And in a later= mail wrote that his Tx PA blew up after 45 minutes.

<= /div>
I hope= that helps you.

<= /div>
73

<= /div>
Gary -= G4WGT.

<= /div>


On 23 November 2010 18:59, M0= FMT <m0fmt@yahoo= .co.uk> wrote:
D= oes anyone know
=A0
a:- What time did=A0the transmission end? Because I have 10s of Mbyte= s of recording to backtrack through and I don't want to be looking at= the time when there was no transmission.
=A0
b:- Was he sending a steady carrier or what was sent? Dennis thinks= it was steady carrier? =A0I think having a regular pulse like an Alpha st= ations would help to identify the carrier through the noise for starters= anyway because a long QRSS or steady carrier is impossible to separate=A0= from all the steady QRM carriers when you are unsure of what you are looki= ng for around that frequency especially at this QTH. It is frustrating to= watch a carrier signal for ages only to find it is QRM.

73 es GL petefmt

I support www.NotSpotTelecom.Com your community Telco /= ISP.

--- On Tue, 23/11/10, Chris Osborn <g3xiz@yahoo.co.uk>= wrote:

From: Chris Osborn <g3xiz@yahoo.co.uk>
Subject: Re: LF: VL= F G3XIZ - QRT
To: rsgb= _lf_group@blacksheep.org
Date: Tuesday, 23 November, 2010, 12:57
Hello Stefan / LF,
=A0
All was going last night well until I=A0heard sparking from the aeria= l distribution box each
time the carrier was turned off.
=A0
After about 45 minutes the PA FET's blew up.
=A0
I did some investigation and found that the output transformer has de= veloped=A0some
short-circuited turns and so is now useless.
=A0
The loading coil seems unharmed so once I get a replacement transform= er and connect=A0in some
new FET's I'll be back in business.
=A0
I'll=A0slow down=A0the rise and fall times of the pulse train fro= m the driver unit to the FET's and hopefully cure the sparking.
=A0
(Mal)
Yes,=A0N.O.V. holders=A0must get prior permission before=A0they trans= mit and must stay by the telephone for the duration.
=A0
Thanks to all those who looked for my signals.
=A0
73
Chris G3XIZ
=A0

=A0
From: Stefan Sch=E4fer <= schaef= er@iup.uni-heidelberg.de>
To= : rsgb_lf_group@blacksheep.org
Sent: Mon, 22 November, 201= 0 21:32:28
Subject: Re:= LF: VLF G3XIZ - QRT

Hi Chris,

Sorry to hear that. Ju= st checked to mails after beeing abscent the weekend and wanted to wish go= od luck too now but just read your mail below.
I assume the breakdown immediately de-tuned your system which reduced the= HV? So the damage is limited to a few turns? Has it happened at the 0.2mm= dia wire?
BTW i am using 0.4mm dia wire, so not really much more...
Good luck in the next tests!

73, Stefan


Am 22.11.201= 0 22:15, schrieb Chris Osborn:=20
Thanks for looking Roger and chaps but game's over for tonight.
I've insulation breakdown somewhere in the aerial circuit and I= can't fix it until daylight.

Maybe try again next weekend.

73 Chris G3XIZ


From: Roger Lapthorn <rogerlapthorn@gmail.com><= br>To: rsgb_lf_group@blacksheep.org; Chris Osbor= n <g3xiz@yahoo.co.uk>
Sent: Mon, 22 November, 201= 0 20:49:24
Subject: Re:= LF: G3XIZ - no copy yet on 8.9719kHz

Just swapped from the loop to the earth el= ectrode - band noise stronger - and there may be a hint of a signal= on Chris's frequency.

73s
Roger G3XBM

On 22 November 2010 20:21, Roger Lapthorn <rogerlapthorn@gmail.com> wrote:
Have been looking for 20 minutes so far but= nothing seen from Chris at about 34km distance.

Will continue to= look for the next 2 hours.

73s
Roger G3XBM

-- http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM=A0=A0 GQRP 1678=A0= =A0=A0 ISWL G11088



= --
http://g3xbm-qrp.blogspot.com/
htt= p://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm<= br>G3XBM=A0=A0 GQRP 1678=A0=A0=A0 ISWL G11088




--0016e642d3baaa000f0495bd4a36--