Return-Path: X-Spam-DCC: paranoid 1233; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u4EF68Zm028047 for ; Sat, 14 May 2016 17:06:08 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1b1b1b-0004vz-PL for rs_out_1@blacksheep.org; Sat, 14 May 2016 15:58:39 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1b1b1b-0004vq-Dw for rsgb_lf_group@blacksheep.org; Sat, 14 May 2016 15:58:39 +0100 Received: from mail-oi0-x22e.google.com ([2607:f8b0:4003:c06::22e]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1b1b1Z-0005X6-5d for rsgb_lf_group@blacksheep.org; Sat, 14 May 2016 15:58:38 +0100 Received: by mail-oi0-x22e.google.com with SMTP id k142so212080864oib.1 for ; Sat, 14 May 2016 07:58:36 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to; bh=iuPDi50BcEzfxFfgEJvFsHnyQfT0jL9tMG5RhAZB4Xw=; b=nvRxpHk26IaNhr7xAJVCa0/DjSRKPH+yHEQUMERiQHgjB5SixjCz+sXC2blIGsE908 iHRIaEp3p0bZ1fAvyUZjCVOjMOeJir59UhBIQgN2j2freToReT2+IBE+1Ipd2VMMtCx0 Pld20gqBdsmR88L+nd1++0Ef1lTJw40nFH+Bh2l36sKSM6Be1tF2XQcm8CxKNJn9/OXH DTtThAuIXK0KF7Y1E/jzjYCAoB/STPbiu/1ByLC3+oosa7FTnXqDIMNLMDj4DFqM1hFR euB6huH4Iy5F2pzN/ggfV5SGaNL4SLFUhMad3qKXK8L9Ax7NGdO/c/ObodCg+vprV17W Felw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to; bh=iuPDi50BcEzfxFfgEJvFsHnyQfT0jL9tMG5RhAZB4Xw=; b=kVeGInLGT8I9JROF52vm68mbfoVxOOGQBhwdaRe2Q6nGvrMrpAfSm3TDuMUQ/ihDy1 ZB9Wokb+f8OiW/ppbqQcTCvov2Li7CfmAL9KiOdiX4sGzkwUmtYI4BsnkcQ8KZOpAiIx KKAEFHsmB4h4lf6d6mjKjH9/2RSVWCe0rqFeWvLeNfLssgH0I9SAqVkQ5SjjWe5PwOwH AgOiRsJgUCh7Mets/ZfF2B1/DNMz/wg99yH4g+XykaLhCoUEiMRp909pK48we1VWwDvV MNfUJAHm3MvEgjMqFsg9YMLzoqs0+TMkQQuYDGpIoBeLMa2X5SBNUKAx/Yg0z+Vooo2V G6xA== X-Gm-Message-State: AOPr4FXVj25bJwI5ig7LN+9xUbH4ghWLdgobeQYUQGH12/o/nmZhIkCB2LXo0uR/c+180s6UooJgIMtNcqjYrQ== MIME-Version: 1.0 X-Received: by 10.202.244.146 with SMTP id s140mr17118oih.159.1463237915101; Sat, 14 May 2016 07:58:35 -0700 (PDT) Received: by 10.202.74.146 with HTTP; Sat, 14 May 2016 07:58:35 -0700 (PDT) In-Reply-To: <245E116B-93B7-4A7D-AD24-FA4B8A8898BA@hurontel.on.ca> References: <5737138D.4050807@posteo.de> <245E116B-93B7-4A7D-AD24-FA4B8A8898BA@hurontel.on.ca> Date: Sat, 14 May 2016 10:58:35 -0400 Message-ID: From: Warren Ziegler To: rsgb_lf_group X-Scan-Signature: f62c7cf8eeb8e5a327b71719e9bffff1 Subject: Re: LF: A transductor instead of a traditional variometer on VLF/LF/MF? Content-Type: text/plain; charset=UTF-8 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8062 Yes NAA uses a saturated core reactor: http://coldwar-c4i.net/VLF/design.html On Sat, May 14, 2016 at 9:33 AM, John Bruce McCreath wrote: > I think they use something like that at the USN's big VLF transmitter NAA in Cutler, Maine, to keep > the giant antenna in tune with the FSK transmissions. The same with SAQ in Grimeton, Sweden. > > 73, J.B., VE3EAR > > LowFER Beacon "EAR" > 188.830 kHz. QRSS30 > EN93dr > > > > > > -- 73 Warren K2ORS WD2XGJ WD2XSH/23 WE2XEB/2 WE2XGR/1