Return-Path: Received: from mtain-db08.r1000.mx.aol.com (mtain-db08.r1000.mx.aol.com [172.29.64.92]) by air-mf02.mail.aol.com (v129.4) with ESMTP id MAILINMF024-8bd44c9a8d4322c; Wed, 22 Sep 2010 19:12:03 -0400 Received: from post.thorcom.com (unknown [195.171.43.25]) by mtain-db08.r1000.mx.aol.com (Internet Inbound) with ESMTP id B3075380001AD; Wed, 22 Sep 2010 19:12:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OyYSD-0005lg-GW for rs_out_1@blacksheep.org; Thu, 23 Sep 2010 00:10:21 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OyYS3-0005lV-5x for rsgb_lf_group@blacksheep.org; Thu, 23 Sep 2010 00:10:11 +0100 Received: from mailout-us.gmx.com ([74.208.5.67]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1OyYS2-0008NP-Ba for rsgb_lf_group@blacksheep.org; Thu, 23 Sep 2010 00:10:12 +0100 Received: (qmail invoked by alias); 22 Sep 2010 23:10:02 -0000 Received: from 66-190-45-206.dhcp.fdul.wi.charter.com (EHLO [192.168.1.112]) [66.190.45.206] by mail.gmx.com (mp-us002) with SMTP; 22 Sep 2010 19:10:02 -0400 X-Authenticated: #60769621 X-Provags-ID: V01U2FsdGVkX19QFv8usQpQDoQ8u0INxRldaNXd8evfZMgCLot9ft wKmxcuiQ6gfaXY Message-ID: <4C9A8CC5.30305@gmx.com> Date: Wed, 22 Sep 2010 18:09:57 -0500 From: "Mike.WE0H" User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000c01cb5a7a$44cfcc50$0401a8c0@xphd97xgq27nyf> <4C1A271605FB0B62@smtp208.alice.it> In-Reply-To: X-Y-GMX-Trusted: 0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: PA0RDT miniwhip in TX? Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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: 3039ac1d405c4c9a8d4222ad X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) My MiniWhip got nailed by lightning static within the first year it was up :-( Mike WE0H Roelof B wrote: > Hello Marco, > > This question comes up from time to time. > I have not had a single report of failure, due to mounting the antenna > close to a transmitting antennas. > > The J310 is quite sturdy. > Steve Ratzlaff, AA7U, has tested it in parallel to a 50 ohm dummy and > 100 W RF and it happily survived. > KL7X had a lightning strike 25 m from his mini-whip and it was still OK. > > The only problems encountered was when people accidentally sent 100 W RF > up the feedline. > This fried the 220 ohm emitter resistor of the 2N5109 and the 2N5109 > itself, but nothing else. > > Due to the small capture area of the PCB antenna, high voltages don't > easily develop. > > If your friend has a problem, I will sent him 10 J310's for free! > > 73, > Roelof, pa0rdt