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Mon, 16 Jul 2018 20:16:35 +0000 From: Laurence KL7 L To: "rsgb_lf_group@blacksheep.org" Thread-Topic: R: Re: LF: TX > RX isolation test Thread-Index: AQHUHS2roWsqS4FZfk+81cjWbsiSUqSSQe+AgAAHfhs= Date: Mon, 16 Jul 2018 20:16:35 +0000 Message-ID: References: <164a4355ec5.marcocadeddu@tin.it>,<5B4CF6D9.18052.2E1B0D0@roelof.ndb.demon.nl> In-Reply-To: <5B4CF6D9.18052.2E1B0D0@roelof.ndb.demon.nl> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-incomingtopheadermarker: OriginalChecksum:3EDC79974AB76D783A8E011BD41A2D26A5D8688E134277081E0C9FEBC138CBF8;UpperCasedChecksum:8FD2468970045CC78AFB40429DB727CA58F8F931CCAD338B03BB273D3B2264DF;SizeAsReceived:7198;Count:46 x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [HIRAfOjS8olwboBdltIM67Ot81ksTacWeRy7T/QxMRA=] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CO1NAM04HT174;7:eI1yCt82+xNf0NLLv0tOwivPWo1DQcPyWyrtSx5g2j4bWyFs8f+MPaQTgkEifQt64Pjq2oAyoFvu4mZiL3GZhGJsAa+9NGdlhDvAiaeRWpPKQVTuOW6IKO90JLVBaiYCnE4a6mEu59aJWeiH8PfxafBs9yftgP1tvRygvU2p/aNAJQmcYtfdw2Stctg0yY34RCsyZRy9tnVysYN+in6QIX4kVT1kOWrdrSQKczKkIfC1SF7QZx8oKlSAUjxyDWHy x-incomingheadercount: 46 x-eopattributedmessage: 0 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(201702061078)(5061506573)(5061507331)(1603103135)(2017031320274)(2017031324274)(2017031323274)(2017031322404)(1603101448)(1601125500)(1701031045);SRVR:CO1NAM04HT174; 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The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: I can confirn the ruggedness too - close thunderstorm strikes using the pa0rdt probe in Ghana, Singapore, Namibia, Malaysia, Fiji, Indonesia and China etc all failed to destroy. Only one time the device failed was a very very close strike on the same tree as the probe was stationed Oklahoma! [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [40.92.11.59 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hellozerohellozero[at]hotmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 7001055fa59a9c23b9831ea6d317a074 Subject: Re: R: Re: LF: TX > RX isolation test Content-Type: text/plain; charset="us-ascii" 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=FORGED_HOTMAIL_RCVD, TO_ADDRESS_EQ_REAL 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by klubnl.pl id w6GKL55o003463 I can confirn the ruggedness too - close thunderstorm strikes using the pa0rdt probe in Ghana, Singapore, Namibia, Malaysia, Fiji, Indonesia and China etc all failed to destroy. Only one time the device failed was a very very close strike on the same tree as the probe was stationed Oklahoma! Laurence > On Jul 16, 2018, at 11:54 AM, Roelof Bakker wrote: > > Hello Marco, > > The J310 is a sturdy device. > In a strong RF field the gate starts to conduct and the gate voltage does not rise any higher. > The device protects itself so to speak. > > Due to the small size of the 'PCB-antenna' of 30 x 40 mm, voltage build up due to nearby > thunderstorms is low compared to e.g. a 1 meter long whip antenna. Hence reports of defunct > antennas due to lightning are rare. > > The most common cause of failure is accidentally sending 100 W RF or more up the feed-line! > > 73, > Roelof, pa0rdt > >