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To: Date: Sun, 4 Aug 2013 15:20:32 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) In-reply-to: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi, Warren. Mike G3XDV and David G0MRF have published information on converting Decca TXs. Perhaps a PM direct to Mike and Dave would produce more information. From what I recall, you need to add more turns to the coils rather than pad the coils with more "C". [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.82.99.236 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 18c0ce4cbca80559a8b22b14cd653174 Subject: LF: RE: Decca Experts - Converting Red to Purple ? Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01CE9126.28F654A0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.8 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_30_40, HTML_FONTCOLOR_BLUE,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: 749 This is a multi-part message in MIME format. ------=_NextPart_000_0020_01CE9126.28F654A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi, Warren. Mike G3XDV and David G0MRF have published information on converting Decca TXs. Perhaps a PM direct to Mike and Dave would produce more information. >From what I recall, you need to add more turns to the coils rather than pad the coils with more "C". 73, Dave G3WCB IO91RM -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Warren Ziegler Sent: 04 August 2013 01:28 To: rsgb_lf_group Subject: LF: Decca Experts - Converting Red to Purple ? Hello to all of the Decca Navigator experts out there... I have an unconverted Decca 5501 transmitter which is marked "Red" - I believe that is 112kHz - would like to run it on 73kHz. The tank coil reads about 80uH, can I just pad it down with more "C" to get to 73kHz or would that mess up the L/C ratio and thus lower the loaded "Q" ? Another question - anyone have a spare "Purple" Decca on 71kHz that they would consider parting with? -- 73 Warren K2ORS WD2XGJ WD2XSH/23 WE2XEB/2 WE2XGR/1 WG2XRS/1 ------=_NextPart_000_0020_01CE9126.28F654A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi,=20 Warren.
 
Mike=20 G3XDV and David G0MRF have published information on converting Decca = TXs.=20 Perhaps a PM direct to Mike and Dave would produce more=20 information.
 
From=20 what I recall, you need to add more turns to the coils rather than pad = the coils=20 with more "C".
 
73,=20 Dave G3WCB IO91RM
-----Original Message-----
From:=20 owner-rsgb_lf_group@blacksheep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Warren=20 Ziegler
Sent: 04 August 2013 01:28
To:=20 rsgb_lf_group
Subject: LF: Decca Experts - Converting Red to = Purple=20 ?

Hello to all of the Decca Navigator experts out = there...

    I have an unconverted Decca 5501 transmitter which = is=20 marked "Red" - I believe that is 112kHz - would like to run it on = 73kHz.=20  The tank coil reads about 80uH, can I just pad it down with more = "C" to=20 get to 73kHz or would that mess up the L/C ratio and thus lower the = loaded "Q"=20 ?

    Another question - anyone have a spare "Purple" = Decca on=20 71kHz that they would consider parting with?



--
73 Warren K2ORS
        =  =20       WD2XGJ
          =  =20     WD2XSH/23
            =  =20   WE2XEB/2
              =  =20 WE2XGR/1
                = WG2XRS/1


 
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