X-GM-THRID: 1218450040017275105 X-Gmail-Labels: rsgb lf X-Gmail-Received: 4555ee381144f16b45021824efabcac50349ef61 Delivered-To: daveyxm@gmail.com Received: by 10.78.127.1 with SMTP id z1cs283902huc; Fri, 27 Oct 2006 20:43:10 -0700 (PDT) Received: by 10.67.93.6 with SMTP id v6mr604109ugl; Fri, 27 Oct 2006 20:43:10 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id k30si199794ugc.2006.10.27.20.43.08; Fri, 27 Oct 2006 20:43:10 -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 1Gdf2t-0002CK-DL for rs_out_1@blacksheep.org; Sat, 28 Oct 2006 04:39:43 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Gdf2s-0002CB-Vc for rsgb_lf_group@blacksheep.org; Sat, 28 Oct 2006 04:39:43 +0100 Received: from mailout11.sul.t-online.com ([194.25.134.85]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Gdf2s-000131-1j for rsgb_lf_group@blacksheep.org; Sat, 28 Oct 2006 04:39:42 +0100 Received: from fwd26.aul.t-online.de by mailout11.sul.t-online.com with smtp id 1Gdf1t-0004vI-01; Sat, 28 Oct 2006 05:38:41 +0200 Received: from dl4eau (ZYned2ZAre3ce4XQLd4Rg7W9PatLF-hp7B4XXogVOvDZKXWyUfBt6W@[217.245.119.77]) by fwd26.sul.t-online.de with smtp id 1Gdf1m-1tbhsO0; Sat, 28 Oct 2006 05:38:34 +0200 From: "Thomas Eckart" To: Date: Sat, 28 Oct 2006 05:38:22 +0200 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: <5.0.2.1.0.20061028061106.03956cb0@popper.forthnet.gr> Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 X-ID: ZYned2ZAre3ce4XQLd4Rg7W9PatLF-hp7B4XXogVOvDZKXWyUfBt6W X-TOI-MSGID: 64a962cb-5d13-48ff-9703-134f9cda26ae X-Spam-Score: -1.0 (-) X-Spam-Report: autolearn=disabled,AWL=-0.970,UNPARSEABLE_RELAY=0.001 Subject: AW: LF: grounded grid 3-500Z Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 Status: O X-Status: X-Keywords: X-UID: 6734 Hi Costas, The Amplifier is designed for 160m; 80m; and 40m ! Not 136khz! I think, it isn't so ease! Thanks for your response! 73' Tom -----Ursprungliche Nachricht----- Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]Im Auftrag von Costas Krallis SV1XV Gesendet: Samstag, 28. Oktober 2006 05:14 An: rsgb_lf_group@blacksheep.org Betreff: Re: LF: grounded grid 3-500Z At 04:58 28/10/2006 +0200, you wrote: >I'm planning to build an amplifier with two times 3-500Z for operation >on low bands. > >Can anyone explain how to measure the grid current in grounded grid >applications? >In all applications there is only a different in measure plate current to >grid current by an other dimension of the shunt resistor. >Is that right? What is the theoretic of this? Perhaps at this low frequency you can just insert a current meter between the grid pin and ground, bypassed with some capacitors ? Costas SV1XV