Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 4B0EC38000098; Fri, 4 Nov 2011 20:19:15 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RMTxq-0002bK-FY for rs_out_1@blacksheep.org; Sat, 05 Nov 2011 00:18:26 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RMTxq-0002bB-3G for rsgb_lf_group@blacksheep.org; Sat, 05 Nov 2011 00:18:26 +0000 Received: from mail-ww0-f47.google.com ([74.125.82.47]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RMTxo-0007tB-4J for rsgb_lf_group@blacksheep.org; Sat, 05 Nov 2011 00:18:26 +0000 Received: by wwf22 with SMTP id 22so3843301wwf.28 for ; Fri, 04 Nov 2011 17:18:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=RDeReGgZtTxN7mfP2tEQsj+O4AKTW7EYJ8WzvtLWsY4=; b=KFyqReEWCH538mFGYHZ2SMTJN+X/7lXGN+D3CC8Ab6+V58sdki54E+YoX6uAXfBhJI Eb34kTa1TaP+Ex11jDthasfncaWwzaT7LVXR8ce/kdni8nmEXUszIXMdDg/VeaagHO4U llcPZhkqhrHkpV91zFxWGLoKRr46sfJcumH4Y= MIME-Version: 1.0 Received: by 10.216.14.166 with SMTP id d38mr4938800wed.14.1320452298094; Fri, 04 Nov 2011 17:18:18 -0700 (PDT) Received: by 10.216.21.195 with HTTP; Fri, 4 Nov 2011 17:18:18 -0700 (PDT) In-Reply-To: <006f01cc9b27$3ac96a10$0401a8c0@xphd97xgq27nyf> References: <006f01cc9b27$3ac96a10$0401a8c0@xphd97xgq27nyf> Date: Fri, 4 Nov 2011 20:18:18 -0400 Message-ID: From: Warren Ziegler To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Decca Mods Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-SCORE: 0:2:374147520:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m001.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40c94eb481036bc5 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Thank you Mal! 73 K2ORS On Fri, Nov 4, 2011 at 3:23 PM, mal hamilton wrote: > LF > Decca mods info > Hi Band Model 5501 E > Measuired L=3D 66uH on orig freq > C =3D 23.7 nH > therefore to retune to 137 Khz needs a 150 nF capicator in series with > existing C result 137.0 Khz > This is the most convenient model to modify for the LF BAND > If you are fortunate to have one of these models, you could be in busines= s > after a couple of hours. > Specified drive is 4.5 volts sq or sine wave although some extra drive is= an > advantage say 7 - 10 Volts > If you have a spare PA capacitor board for the lower freq units there are > plenty of 150 nF capacitors for the mod. > These amplifiers and individual units ( 3 per amp) are easily modified fo= r > any freq of interest 600, 160,=A080 metres and maybe even 40 metres. Each > individual unit will produce around 400 Watts at around 67 volts into a 7= 1 > ohm load or alternatively use 60 volts into a 50 ohm load. > More info available if needed > > 73 de mal/g3kev > > --=20 73 Warren K2ORS =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XGJ =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XSH/23 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XGR/1