Return-Path: Received: from mtain-df04.r1000.mx.aol.com (mtain-df04.r1000.mx.aol.com [172.29.64.216]) by air-mc06.mail.aol.com (v129.4) with ESMTP id MAILINMC061-a96f4ceaa50a18c; Mon, 22 Nov 2010 12:14:50 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 546C6380001B5; Mon, 22 Nov 2010 12:14:48 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PKZws-0000rV-Hi for rs_out_1@blacksheep.org; Mon, 22 Nov 2010 17:13:02 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PKZwr-0000rM-Nw for rsgb_lf_group@blacksheep.org; Mon, 22 Nov 2010 17:13:01 +0000 Received: from nm1.bullet.mail.ukl.yahoo.com ([217.146.183.218]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1PKZwr-0005f3-Bh for rsgb_lf_group@blacksheep.org; Mon, 22 Nov 2010 17:13:01 +0000 Received: from [217.146.183.208] by nm1.bullet.mail.ukl.yahoo.com with NNFMP; 22 Nov 2010 17:12:55 -0000 Received: from [217.146.183.173] by tm1.bullet.mail.ukl.yahoo.com with NNFMP; 22 Nov 2010 17:12:55 -0000 Received: from [127.0.0.1] by omp1014.mail.ukl.yahoo.com with NNFMP; 22 Nov 2010 17:12:55 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 548540.1765.bm@omp1014.mail.ukl.yahoo.com Received: (qmail 37579 invoked by uid 60001); 22 Nov 2010 17:12:55 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1290445975; bh=B/PeFsI+IzEaxhhjiYy6rHJcsERnLduF/og3Y4uf8VU=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=3CJdVmkn4uCSTszhR7qiNTHGrVTLbB7RoNXh9u5fWGUp0yHqVp/sJ3zgSXC8OftIRCWiMA4XO9dU8cqFoLo0ylxJESU1tL6ftY3dFks9k8M14iyAz3W0jPeTGD3Uab6ykTgiEZPWNggbfV/fTCwl1SKggmpCZDb9Et0aMBjjKhM= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=XsYiGv7Wruco09TqS2Jw90IwbgxQLfiy9ck9UOUFJNlp4U/NMTaLBaqm9emyA6hXTNpLBQITfYgCqDniiM80EVPJeK5q3yH7xePZOdNBQSddEXGpxKmBmxcc09LJajz8MujsE4wY33neWM8s/cA7YW2LqN5LjyJRxLOUS+Z/rFI=; Message-ID: <256616.36903.qm@web28502.mail.ukl.yahoo.com> X-YMail-OSG: tPLVK3UVM1ksL9sR_BBJUN.J8DseMejy83_djkk1D55eIP0 y9sZ4KHP38rPFk.ftLaVHXHWPphta0Um00xfcKGN97sBAi4B0PAPfuguxAlJ AqXHLIzWnperER6Rk4J7kClDsTC51oEeyyC5dgJql4PThAJOrRxdEO0V_DId C65cN7EJ5bO5mMVAjL2nLpYkbko0z.dL9K4gY3qgoLyi_LdS2__BbxCAJwVk b6q7uHW1PWS0uemkp9RWIoDtIITsuZ0zTpdOg4q_Ux5jXrVZ9dx2WVoMuXEg - Received: from [81.97.191.183] by web28502.mail.ukl.yahoo.com via HTTP; Mon, 22 Nov 2010 17:12:55 GMT X-Mailer: YahooMailRC/504.5 YahooMailWebService/0.8.107.285259 References: <861077.53684.qm@web28512.mail.ukl.yahoo.com> <863803.39905.qm@web28510.mail.ukl.yahoo.com> <000901cb8a60$07eb0f50$0301a8c0@your91hoehfy9g> Date: Mon, 22 Nov 2010 17:12:55 +0000 (GMT) From: Chris Osborn To: rsgb_lf_group@blacksheep.org In-Reply-To: <000901cb8a60$07eb0f50$0301a8c0@your91hoehfy9g> MIME-Version: 1.0 DomainKey-Status: good (testing) Subject: Re: LF: Re: VLF Transmissions Content-Type: multipart/alternative; boundary="0-555199148-1290445975=:36903" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_50_60,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-AUTHENTICATION: mail_rly_antispam_dkim-m211.1 ; domain : yahoo.co.uk DKIM : pass x-aol-sid: 3039ac1d40d84ceaa5081b42 X-AOL-IP: 195.171.43.25 --0-555199148-1290445975=:36903 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hello Mal, I've wound an air-cored loading coil of about 1.3 H It's on a wooden frame with hexagonal ends (all yacht varnished) and has= a mean=20 diameter of 2 feet. The winding length is 20 inches and it resonates my 40m inverted 'L' at th= e=20 correct frequency of 8.97 kHz I've made a VLF exciter which generates the drive frequency and interfaces= with=20 the PC's software. It uses a 2297 kHz crystal divided by 256 and gives a square wave output= for the=20 PA FET's. I can run CW, QRSS or DFCW with 0.05 Hz shift. For the TX I've modified my existing 200 watt 500 kHz PA and for matching= use an=20 ex-UPS transformer. The PA seems quite efficient into a 2000 - 3000 ohm resistive load. I have yet to be picked up beyond the boundary of my own garden so would= be over=20 the moon if anyone else can detect my signals. 73 Chris=20 G3XIZ ________________________________ From: mal hamilton To: rsgb_lf_group@blacksheep.org Sent: Mon, 22 November, 2010 16:12:15 Subject: LF: Re: VLF Transmissions =EF=BB=BF =20 Chris What are u using for a loading coil, amp etc mal/g3kev =20 ----- Original Message -----=20 >From: Chris Osborn=20 >To: LF Group=20 >Sent: Monday, November 22, 2010 3:13 PM >Subject: LF: VLF Transmissions > > >LF, > >I have permission to transmit VLF this evening and details are as foll= ows:- > > > > ________________________________ =20 > > >=20 >DETAILS OF TESTS > Loc: Biggleswade IO 92 UB =20 >Time: Monday 22nd November 2010 20.00 - 22.00 GMT >Freq: 8.9719 kHz >Mode: QRSS - 10 second dot length / DFCW with 0.05 Hz shift / CW= =20 >identifier at 5 wpm >Power: Limited to 20 watts RF output (ERP unknown) >Aer: 40m inverted 'L' at 10 m above ground. > > >Any reports or comments are welcome.I > >Regards, >=20 >Chris=20 > >G3XIZ > > > > =20 --0-555199148-1290445975=:36903 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hello Mal,

I've wound an air-cored loading coil of about 1.3= H
It's on a wooden frame with hexagonal ends (all yacht varnished) and= has a mean diameter of 2 feet.
The winding length is 20 inches and it= resonates my 40m inverted 'L' at the correct frequency of 8.97 kHz
I've made a VLF exciter which generates the drive frequency and interface= s with the PC's software.
It uses a 2297 kHz crystal divided by 256 and= gives a square wave output for the PA FET's.
I can run CW, QRSS or DFC= W with 0.05 Hz shift.

For the TX I've modified my existing 200 watt= 500 kHz PA and for matching use an ex-UPS transformer.
The PA seems qu= ite efficient into a 2000 - 3000 ohm resistive load.

I have yet to= be picked up beyond the boundary of my own garden so would be over the mo= on if anyone else can detect my signals.

73 Chris
G3XIZ



From: mal hamilton <g3kevma= l@talktalk.net>
To:= rsgb_lf_group@blacksheep.org
Sen= t: Mon, 22 November, 2010 16:12:15
Subject: LF: Re: VLF Transmissions

= =EF=BB=BF =20
Chris
What are u using for a loading coil,= amp=20 etc
mal/g3kev
 
----- Original Message -----
From:= =20 Chris Osb= orn=20
Sent: Monday, November 22, 2010= 3:13=20 PM
Subject: LF: VLF Transmissions<= /div>

LF,

I have permission to transmit VLF this evening and= details=20 are as follows:-



 
DETAILS OF TESTS
 
Loc:        =20 Biggleswade   IO 92 UB =20
Time:       Monday 22nd Nov= ember=20 2010   20.00 - 22.00 GMT
Freq:        8.9719 kHz
Mode:      QRSS - 10 second dot length /= DFCW=20 with 0.05 Hz shift / CW identifier at 5 wpm
Power:     Limited to 20 watts RF output= (ERP=20 unknown)
Aer:         40m inverted= 'L' at=20 10 m above ground.


Any reports or comments are welcome.I
Regards,
 
Chris
G3XIZ





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