Return-Path: X-Spam-DCC: paranoid 1480; 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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD,SPF_PASS 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 u9CA0t40021636 for ; Wed, 12 Oct 2016 12:00:55 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1buGIg-0003vv-3w for rs_out_1@blacksheep.org; Wed, 12 Oct 2016 10:58:14 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1buGIf-0003vm-Rl for rsgb_lf_group@blacksheep.org; Wed, 12 Oct 2016 10:58:13 +0100 Received: from smtpout.karoo.kcom.com ([212.50.160.34]) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1buGIe-00064l-6w for rsgb_lf_group@blacksheep.org; Wed, 12 Oct 2016 10:58:12 +0100 X-IronPort-AV: E=Sophos;i="5.31,333,1473116400"; d="scan'208";a="172974020" Received: from unknown (HELO [127.0.0.1]) ([109.176.246.47]) by smtpout.karoo.kcom.com with ESMTP; 12 Oct 2016 10:58:11 +0100 Message-ID: <57FE08D7.9030505@lineone.net> Date: Wed, 12 Oct 2016 10:56:39 +0100 From: LineOne User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Thunderbird/31.1.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <57FD3F9F.80409@lineone.net> <96A364FD96384B12A5C11912AFBFE844@gnat> In-Reply-To: <96A364FD96384B12A5C11912AFBFE844@gnat> X-Scan-Signature: 5c335215f1b3de26d890ee84d49616ce Subject: Re: LF: Re: Audio link Content-Type: text/plain; charset=utf-8; format=flowed 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 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 9030 Thank you Alan. Any laser type link will be home constructed, it will be strictly PWM and the range will be point to point from my shack weather station pole to a high point on the house. On 11/10/2016 22:09, Alan Melia wrote: > Hi Hugh they can create horrendous RFI if you are not careful. The > ones used for TV distibution "may" be better......the good ones are > notched at the amateur bands and being for digital levels dont use AGC. > > Alan > G3NYK (who moonlights on the EMC committee) > > To: > Sent: Tuesday, October 11, 2016 8:38 PM > Subject: LF: Audio link > > >> To avoid having laptop running in the shack, which occasionally >> produces some QRM, I can send received audio from the shack to a >> desktop computer in the house on a twisted telephone pair. This works >> but any wire connection between shack and this desktop introduces >> some spurious signals on 136khz even if I use an audio isolating >> transformer. >> >> 73, Hugh, M0DSZ >> > > >