Return-Path: X-Spam-DCC: paranoid 1170; Body=2 Fuz1=2 Fuz2=2 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 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 t6KI2ooX004164 for ; Mon, 20 Jul 2015 20:02:50 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZHFKY-0005oQ-Qf for rs_out_1@blacksheep.org; Mon, 20 Jul 2015 18:58:22 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZHFKY-0005oH-CN for rsgb_lf_group@blacksheep.org; Mon, 20 Jul 2015 18:58:22 +0100 Received: from smtpout2.wanadoo.co.uk ([80.12.242.42] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.85) (envelope-from ) id 1ZHFJU-00016h-AB for rsgb_lf_group@blacksheep.org; Mon, 20 Jul 2015 18:58:21 +0100 Received: from AGB ([95.150.81.6]) by mwinf5d23 with ME id uhwx1q00L08AnGn03hwxcU; Mon, 20 Jul 2015 19:57:00 +0200 X-ME-Helo: AGB X-ME-Date: Mon, 20 Jul 2015 19:57:00 +0200 X-ME-IP: 95.150.81.6 Message-ID: From: "Graham" To: References: <14333894.20150720161829@chriswilson.tv> In-Reply-To: <14333894.20150720161829@chriswilson.tv> Date: Mon, 20 Jul 2015 18:56:57 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Scan-Signature: e6de17d69e46ff4ea8db042ef2cd7e46 Subject: Re: LF: Power monitoring at LF? Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 3672 Non that I have seen Chris, , there are high power MW elements , in the KW ranges the HF ones work on 477 , with a off set , 136 , more likely to of given up by then depends on the power , Ae matching and you need one of Jim's scope match devices - see G4WGT web site c/w why not to use it on 477 .. other than that , ferrite ring and pick up coil , 50 load will be 1:1 match , so amps can be calibrated to watts , if your using class E/D amp , then the DC power in is going to be say 10% more than the power out ... other users any values ??? >> Sure Stephen will have some sort of emp proof measuring device, >> may be a spark gap and tape measure :-) 73-G, -------------------------------------------------- From: "Chris Wilson" Sent: Monday, July 20, 2015 4:18 PM To: Subject: LF: Power monitoring at LF? > 20 July 2015 > > > Do any Bird elements give meaningful readings down at 136kHz? If not > are there any commercial alternatives to building something? Thanks. > > > > -- > > > Best regards, > Chris mailto:chris@chriswilson.tv > >