Return-Path: Received: from mtain-db01.r1000.mx.aol.com (mtain-db01.r1000.mx.aol.com [172.29.64.85]) by air-ma05.mail.aol.com (v129.10) with ESMTP id MAILINMA052-b5254de2a244353; Sun, 29 May 2011 15:45:08 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-db01.r1000.mx.aol.com (Internet Inbound) with ESMTP id DA57C38000097; Sun, 29 May 2011 15:45:06 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QQluK-0007H0-RS for rs_out_1@blacksheep.org; Sun, 29 May 2011 20:44:16 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QQluK-0007Gr-FU for rsgb_lf_group@blacksheep.org; Sun, 29 May 2011 20:44:16 +0100 Received: from out1.ip02ir2.opaltelecom.net ([62.24.128.238]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QQluI-0002jq-Eh for rsgb_lf_group@blacksheep.org; Sun, 29 May 2011 20:44:16 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AnIBACyh4k1cF/l7/2dsb2JhbABVhEmTJUCOD3eIcax9j0yBK4NsgQcElSqKQA X-IronPort-AV: E=Sophos;i="4.65,289,1304290800"; d="scan'208";a="366167743" Received: from unknown (HELO xphd97xgq27nyf) ([92.23.249.123]) by out1.ip02ir2.opaltelecom.net with SMTP; 29 May 2011 20:44:08 +0100 Message-ID: <002801cc1e38$c42eb920$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <1306697738.1967.9.camel@gerhard-desktop> Date: Sun, 29 May 2011 20:44:04 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: OE3GHB Grabbers Content-Type: text/plain; charset="UTF-8" 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 x-aol-global-disposition: G x-aol-sid: 3039ac1d40554de2a2422696 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Gerhard Be prepared for the Big EMP and use a tube preferably a 4CX1500 instead of FET preamps. g3kev ----- Original Message ----- From: "Gerhard Hickl" To: Sent: Sunday, May 29, 2011 8:35 PM Subject: LF: OE3GHB Grabbers > Hello group! > > Both of my grabbers for LF and VLF are working normally again since > yesterday evening. After a distant thunderstorm last week, the VLF > grabber failed because of a damaged FET in the first stage of the > E-Probe. > > I replaced the transistor and added three protecting diodes into the > first stage. I hope this will solve the problem definitely. > > The LF-grabber which was not affected got stuck last Friday evening when > the PC which is running all the instances of SpecLab hang. This also > happened because of a local thunderstorm. So you see, on LF and VLF > there are many other challenges beside propagation and noise..... > > LF: > members.aon.at/grabber > > VLF: > members.aon.at/grabber/VLF > > 73 > OE3GHB > Gerhard > > > > > > > >