Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd06.r1000.mx.aol.com (Internet Inbound) with ESMTP id B7709380000AA; Thu, 5 Jul 2012 14:52:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Smr94-0001wP-8j for rs_out_1@blacksheep.org; Thu, 05 Jul 2012 19:51:18 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Smr93-0001wG-RG for rsgb_lf_group@blacksheep.org; Thu, 05 Jul 2012 19:51:17 +0100 Received: from mail-ey0-f171.google.com ([209.85.215.171]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1Smr91-0008DM-U4 for rsgb_lf_group@blacksheep.org; Thu, 05 Jul 2012 19:51:16 +0100 Received: by eaaa12 with SMTP id a12so5456993eaa.16 for ; Thu, 05 Jul 2012 11:51:15 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=hq4C4JyvgY2EXYgmfCQVlZcpOKtcWLo46s7R90et1lY=; b=S38ulVXZUo5j4k6mZQ8vNAufSkr3qPey8x8V/CtmN8bHX8veZpBEzPHqFSnFS0fpGg Y/T/CK9mKh8rKsef6Svn/Vqe/PZSrHH2KPf1TpGd8blLbz4g73wjxKjq4/+/mkyP75G5 Wd0MLR779ItB6WL8dpdJ33lI3Y5GpowLa3m9Ca288mSso0C6CAUbNpGmqCjRVg7Aknx0 aLXUDtNYe3p1QoNoiJRe/1B0YjffMT4kPHO71uJuJuoKWtnUULkfo2gNBklOcXd861lS 8nCMgu9Qw5JF4dWyaK1FJ9LBMHqkVGiSSB7Iv77UhVvk3VgbhM0DupxbXqjmMFok6vbw hMwQ== Received: by 10.14.98.66 with SMTP id u42mr6405030eef.209.1341514275112; Thu, 05 Jul 2012 11:51:15 -0700 (PDT) Received: from [192.168.21.4] ([87.114.137.234]) by mx.google.com with ESMTPS id q53sm65209413eef.8.2012.07.05.11.51.13 (version=SSLv3 cipher=OTHER); Thu, 05 Jul 2012 11:51:14 -0700 (PDT) Message-ID: <4FF5E220.3010004@gmail.com> Date: Thu, 05 Jul 2012 18:51:12 +0000 From: John P-G User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:11.0) Gecko/20120312 Thunderbird/11.0 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: ,<4FF5CA64.8020202@iup.uni-heidelberg.de> <7E7DFBB4D102A04DB5ADC88D66628A4A0FAB99CC@ICTS-S-MBX5.luna.kuleuven.be> In-Reply-To: <7E7DFBB4D102A04DB5ADC88D66628A4A0FAB99CC@ICTS-S-MBX5.luna.kuleuven.be> X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: On 05/07/2012 18:38, Rik Strobbe wrote: > Stefan, > > what about a huff&puff oscillator (http://www.hanssummers.com/huffpuff.html) ? > > 73, Rik ON7YD - OR7T > LF, My first 500kHz TX used a huff/puff VFO and it was very stable - as long as the RF pickup in the shack, while on TX, was minimized and the VFO and HuffPuff circuit were very well screened - otherwise the HuffPuff stabilization was lost during key down, and regained during RX. Still, a very nice way to get a VFO stable enough for WSPR without the need for DDS etc. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.215.171 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (gm4slv[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 7aa9ad08848e488e22e0ff1d71f4ef1d Subject: Re: LF: RE: Analog oscillators 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-SCOLL-SCORE: 0:2:350305504:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d247.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40924ff5e2526faa X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none On 05/07/2012 18:38, Rik Strobbe wrote: > Stefan, > > what about a huff&puff oscillator (http://www.hanssummers.com/huffpuff.html) ? > > 73, Rik ON7YD - OR7T > LF, My first 500kHz TX used a huff/puff VFO and it was very stable - as long as the RF pickup in the shack, while on TX, was minimized and the VFO and HuffPuff circuit were very well screened - otherwise the HuffPuff stabilization was lost during key down, and regained during RX. Still, a very nice way to get a VFO stable enough for WSPR without the need for DDS etc. John GM4SLV