Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 343E038000094; Fri, 27 Jan 2012 23:27:41 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Rqzro-0005PO-Ku for rs_out_1@blacksheep.org; Sat, 28 Jan 2012 04:26:20 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Rqzrn-0005PF-Ii for rsgb_lf_group@blacksheep.org; Sat, 28 Jan 2012 04:26:19 +0000 Received: from fish2.hurontel.on.ca ([216.46.129.163]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Rqzrl-0000Wu-1L for rsgb_lf_group@blacksheep.org; Sat, 28 Jan 2012 04:26:19 +0000 X-ASG-Debug-ID: 1327724769-00770a08b808150001-a32kfu Received: from [192.168.1.101] (pppoe.dyn-216.46.157.44.hurontel.on.ca [216.46.157.44]) by fish2.hurontel.on.ca with ESMTP id 92oeorlnSGyOa6kk for ; Fri, 27 Jan 2012 23:26:09 -0500 (EST) X-Barracuda-Envelope-From: weazle@hurontel.on.ca X-Barracuda-Apparent-Source-IP: 216.46.157.44 Mime-Version: 1.0 (Apple Message framework v1084) From: John Bruce McCreath X-ASG-Orig-Subj: Re: LF: OT: Headphones In-Reply-To: <3619E220-5FD1-4CC2-B40A-E24AF7FEBC7B@hurontel.on.ca> Date: Fri, 27 Jan 2012 23:26:08 -0500 Message-Id: <73A6E02B-F20C-485F-AC43-A65440756F21@hurontel.on.ca> References: <3619E220-5FD1-4CC2-B40A-E24AF7FEBC7B@hurontel.on.ca> To: rsgb_lf_group@blacksheep.org X-Mailer: Apple Mail (2.1084) X-Barracuda-Connect: pppoe.dyn-216.46.157.44.hurontel.on.ca[216.46.157.44] X-Barracuda-Start-Time: 1327724769 X-Barracuda-URL: http://fish.hurontel.on.ca:8000/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at hurontel.on.ca X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=5.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.86884 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=us-ascii Subject: Re: LF: OT: Headphones Content-Transfer-Encoding: quoted-printable 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-SCOLL-SCORE: 0:2:257860112:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d608d4f23793d2557 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Further to my first posting about DIY sensitive headphones. If you need = a higher Z than the 600 ohms of the 'phones themselves, use a Bogen T-725 audio = transformer with them to get a Z as high as 40K. They cost about $10 here in Canada. 73, J.B., VE3EAR LowFER Beacon "EAR" 188.830 kHz. QRSS30 EN93dr