Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id vBNMfgG4014472 for ; Sat, 23 Dec 2017 23:41:43 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eSsPe-00008p-CT for rs_out_1@blacksheep.org; Sat, 23 Dec 2017 22:37:02 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eSsPX-00008f-3K for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2017 22:36:55 +0000 Received: from mout.perfora.net ([74.208.4.194]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eSsPT-0002wH-Fy for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2017 22:36:53 +0000 Received: from [192.168.1.125] ([72.224.254.201]) by mrelay.perfora.net (mreueus002 [74.208.5.2]) with ESMTPA (Nemesis) id 0MUFgS-1eb5da1hiM-00Qzvc for ; Sat, 23 Dec 2017 23:36:48 +0100 To: rsgb_lf_group@blacksheep.org References: <4ffc7958-810a-e4d2-7745-258a58338934@n1bug.com> <5A3AE81B.9010205@posteo.de> <5A3B8FB1.1020403@posteo.de> <7ee833a8-04b4-4712-d927-7eccf37eec14@n1bug.com> <5A3D9BC1.1040609@posteo.de> <6fa587ef-d5b0-6a67-b604-ba94144444f7@n1bug.com> <5A3E77DD.4090908@posteo.de> <103A2C60B87B4930A99ED33442E477AF@StevePC> From: N1BUG Message-ID: <792271d9-34bb-3fb1-140c-c322015e2e9b@n1bug.com> Date: Sat, 23 Dec 2017 17:36:47 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: <103A2C60B87B4930A99ED33442E477AF@StevePC> Content-Language: en-US X-Provags-ID: V03:K0:CIjkCLBpY76Cj7KpdduFq2Ppuu33CxtyrD5eQOaCN/LvENzoadp COXvbG1xNPlHPzL/HNQFu4FZBtQwjBWotnQCYJ2qMsA5vHmc+Sh4Pg7mtR+bsqGkjmdgKdD 4UCL0lYlRZg/Nh7iGzVx/Vl1B1EUyotpldlk/wCr1dO1YgN6etA+JW/rpesRfalS/jzfAA3 Ha33PyL+ctiSVFWUK11Pg== X-UI-Out-Filterresults: notjunk:1;V01:K0:sx37JR0qNSc=:RIYlS1KM4eaK4kTAFex56g eC8uLTn11FBxoB/sa1CA3/Uphu8zW8VE191y3EAQ1TN8DoC/YF3Qv0zHyDejQ2T7rIUfnJNfN WYCKP/XVpIAid5x0CX/Qlfc5wogzuSiCHUHM8nmDEa1yt11jMVnVRiv0LsSN8z6YVvhuFIVRV 4o0/mGYcHJaDJJkxoEnb3xluJ75RBx6RKBRsCz25EL1ZbGT8Hf9W+dA7Zkk2h+QDSxer3TSlp f4Lz+GTNZuIb1kOw9RwlK2MwKPZbx/YvAACZjm1VFZDiP7pgEZCzEbSPykDDiyHUbFZfwUUly ZqjbniuoK3ScdzM6fLyDSglCzmX69k7Drl4mNqY7pooxY3OsOhvzDpVAOaNxu12Sn3krulCtx 4AwUiPGqs4BxPmLvMOQn7FuRvfPbnNNbZ/tYXPT6gdyNd8Q+wy4mTE7+cwmy9edTm+XGf5ov/ QartcWU1yVGSixEMJ+QgCkLNfSLqMXJ4zoWrO7pfNDeclNmah3WQi6vfI74ujnny+Kkqf4tZY fWUosxcAfJZ0li4IZePV07xiFK5F/iqjroZMWawTNBwqoEyAa28ZZdDUdJEspfzGAThw5S0Ud Br6skG1sU9EmKOuWSFaeIQLQecz1wVOXtDlNOAwaZCBwfJyxBovMFVl1MmTMi6y2uhjb58H0l nV/OP/P2Yveyb9r/Pl+BAGLsLhj4v/95bpFo/SaoljQhr3DUK1HEiQofRlgfXKmReiOKCuJeC oQBhnVWqCJ25lIvRvC3OWpYBndalhxWtABEbrSxFKjb114rJz7OuCTzteQ0= X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: On 12/23/2017 04:54 PM, Steve wrote: >> It will run perfectly stable into the 50 ohm dummy load at 25 watts >> output. Into the antenna it will do no better than 17 watts, usually less >> before something goes wrong. > > > > This looks suspiciously like there is still some reactance in the antenna > system Paul. If it's anything these amplifier types can't tolerate it is > reactance in the output. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- X-Scan-Signature: f62c7cf8eeb8e5a327b71719e9bffff1 Subject: Re: LF: TXing 2200m WSPR Content-Type: text/plain; charset=utf-8; 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 On 12/23/2017 04:54 PM, Steve wrote: >> It will run perfectly stable into the 50 ohm dummy load at 25 watts >> output. Into the antenna it will do no better than 17 watts, usually less >> before something goes wrong. > > > > This looks suspiciously like there is still some reactance in the antenna > system Paul. If it's anything these amplifier types can't tolerate it is > reactance in the output. It does seem that way Steve. Unfortunately if that is the problem one or both of the following must then be true: 1) My scopematch is not working correctly 2) My eyesight is not good enough to distinguish the error on the scope The two sine waves looked perfectly aligned to me earlier but the amp was not happy at all. I will admit the resistance was a bit low, probably around 46 or 47 ohms at the time. However the next available transformer tap was probably too far the other way. For anyone trying to follow along, this is my current version: http://n1bug.com/ASB_LF_Amp-20171223.jpg 73, Paul