X-GM-THRID: 1237768763322001571 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.78.172.1 with SMTP id u1cs551053hue; Tue, 29 May 2007 01:44:39 -0700 (PDT) Received: by 10.67.44.4 with SMTP id w4mr5875128ugj.1180428279245; Tue, 29 May 2007 01:44:39 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id a1si6884191ugf.2007.05.29.01.44.35; Tue, 29 May 2007 01:44:39 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1HsxC6-0001LU-DE for rs_out_1@blacksheep.org; Tue, 29 May 2007 09:36:42 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1HsxC5-0001LL-SG for rsgb_lf_group@blacksheep.org; Tue, 29 May 2007 09:36:41 +0100 Received: from mail3.uklinux.net ([80.84.72.33]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1HsxC5-0003oY-1p for rsgb_lf_group@blacksheep.org; Tue, 29 May 2007 09:36:41 +0100 Received: from o (bts-0679.dialup.zetnet.co.uk [194.247.50.167]) by mail3.uklinux.net (Postfix) with SMTP id E98B340AA03 for ; Tue, 29 May 2007 08:36:37 +0000 (UTC) Message-ID: <001c01c7a1cc$7ee7a8a0$a732f7c2@o> From: "Gw3UEP" To: Date: Tue, 29 May 2007 09:32:57 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: MF: Ships' MF Tx info... Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C7A1D4.5769F910" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=HTML_70_80,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 Status: O X-Status: X-Keywords: X-UID: 2478 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01C7A1D4.5769F910 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Landlubbers ahoy! An input resistance to die for... Classic Marconi Oceanspan MF spec: Measured into an artificial aerial load with the following constants : Capacity 300 uuF Resistance 3.6 ohms CW (A1) 65 Watts at 4.2 amps approx MCW(A2) 72 Watts at 4.5 amps approx =20 Aerial Characteristics The transmitter is designed to work into an aerial with the following = characteristics : Medium Freq Main aerial 410 - 512 khz 300 - 750 = uuF + 1.9 - 10 ohms =20 Emergency aerial 500 khz 200 - 400 uuF = + 1.9 - 10 ohms = =20 As an approximation, the aerial capacitances given above would be = equivalent to the following aerial lengths: Main aerial = 150 - 330 feet Emergency aerial 90 = - 170 feet. end. Class I ship:=20 Main Tx: 102 metre-amps: Range 175 nautical-miles. Reserve Tx: 76 metre-amps: Range 150 nautical-miles. QTO, Rog. ------=_NextPart_000_0009_01C7A1D4.5769F910 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Landlubbers=20 ahoy!  An=20 input resistance to die for...

 

Classic=20 Marconi Oceanspan MF spec:

 

Measured=20 into an artificial aerial load with the following = constants=20 :

 

Capacity          = ;            =        =20 300 uuF

Resistance         &nb= sp;           &nbs= p;    =20 3.6 ohms

CW=20 (A1)           &nb= sp;           &nbs= p;       65=20 Watts =20 at  4.2 amps approx

MCW(A2)          =             &= nbsp;      72=20 Watts =20 at  4.5 amps approx

 

 Aerial =20 Characteristics

The=20 transmitter is designed to work into an aerial with the following=20 characteristics :

 

Medium=20 Freq

Main=20 aerial           &= nbsp;          =20 410 -  512=20 khz           &nbs= p; =20 300 - 750 uuF +  1.9 - 10 ohms

 

Emergency=20 aerial           &= nbsp;  =20 500=20 khz           &nbs= p;        =20 200 - 400 uuF +   1.9 - 10 ohms

           &= nbsp;           &n= bsp;           &nb= sp;           &nbs= p;            = ;            =              =

As=20 an approximation, the aerial = capacitances=20 given above would be equivalent to the following aerial = lengths:

Main=20 aerial           &= nbsp;           &n= bsp;           &nb= sp;           &nbs= p;            = ;   150=20 - 330 feet

Emergency=20 aerial           &= nbsp;           &n= bsp;           &nb= sp;           &nbs= p;     =20 90  -  170 feet.

 

end.

 

Class I = ship:=20

Main=20 Tx:       102 metre-amps:   = Range=20 175 nautical-miles.

Reserve=20 Tx:     76 metre-amps:  Range 150=20 nautical-miles.

 

QTO,

Rog.

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