Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 10B8738000094; Sun, 25 Mar 2012 14:46:11 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SBsRD-0002tF-C9 for rs_out_1@blacksheep.org; Sun, 25 Mar 2012 19:45:11 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SBsRD-0002t6-0y for rsgb_lf_group@blacksheep.org; Sun, 25 Mar 2012 19:45:11 +0100 Received: from smtp-vbr12.xs4all.nl ([194.109.24.32]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SBsRA-0008DC-0P for rsgb_lf_group@blacksheep.org; Sun, 25 Mar 2012 19:45:10 +0100 Received: from pc-roelof (ndb.demon.nl [82.161.81.65]) by smtp-vbr12.xs4all.nl (8.13.8/8.13.8) with ESMTP id q2PIj2sV067868 for ; Sun, 25 Mar 2012 20:45:07 +0200 (CEST) (envelope-from roelof@ndb.demon.nl) To: rsgb_lf_group@blacksheep.org References: <1FFFC71EA0BE4176BEFFBF7D095D3BA9@Extensa> <4106A79FDAE74690B0A2C710BDA51B55@Extensa> Date: Sun, 25 Mar 2012 20:45:00 +0200 MIME-Version: 1.0 From: "Roelof Bakker" Message-ID: In-Reply-To: User-Agent: Opera Mail/11.61 (Win32) X-Virus-Scanned: by XS4ALL Virus Scanner X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes Subject: Re: LF: Re: Power experiment / Mini Whip / 8970 Hz ! 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-SCOLL-SCORE: 0:2:362416896:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60564f6f67f36ac4 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Peter, I found that a BFQ19S gives slight better strong signal handling performance. But more important, it works better at a lower supply voltage. So, for use with a 9V battery, the BFQ19S is recommended. At 12V you will not notice any difference. You could also try to feed the antenna direct from a battery by a separate two wire DC cable, instead of over the coax cable. In this case the antenna interface can be omitted. It is best to place the battery at the foot of the mast. There are more options, like using CAT5 cable, isolating transformers etc. However, it all depends on your specific location. 73, Roelof, pa0rdt