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[82.70.254.222]) by smtp.gmail.com with ESMTPSA id i13sm30216095wrw.32.2018.11.22.02.36.10 (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 22 Nov 2018 02:36:10 -0800 (PST) Date: Thu, 22 Nov 2018 10:36:08 +0000 From: Chris Wilson X-Priority: 3 (Normal) Message-ID: <14662989.20181122103608@gmail.com> To: DK7FC In-Reply-To: <5BF5667D.3030406@posteo.de> References: <6DB8451D7F3D3947A5918808A59621EA14E200EB@servigilant.vigilant.local> <5BF556E7.2010606@posteo.de> <1058403118.20181121134022@gmail.com> <5BF5667D.3030406@posteo.de> MIME-Version: 1.0 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 @@CONTACT_ADDRESS@@ for details. Content preview: Hello DK7FC, Wednesday, November 21, 2018, 2:06:53 PM, you wrote: > Hi Chris, Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:32b listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dead.fets[at]gmail.com) 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 2e2f7cbbe9f38dd7bf3fac4fc012e6fc Subject: Re: LF: On air again in LF WSPR-15 Content-Type: text/plain; charset=us-ascii 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=0.8 required=5.0 tests=PRIORITY_NO_NAME 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 Hello DK7FC, Wednesday, November 21, 2018, 2:06:53 PM, you wrote: > Hi Chris, > Yes i published it on Dropbox a few years ago but i think the link > doesn't work any more. I attach the two images here, the size is small > enough. > 73, Stefan Thanks for the schematics Stefan! Do you know exactly what toroid you used (assuming it is a toroid) for the gate driver transformer please? Would the output level of the Si chip in a QRP Labs U3S be enough to drive this amp direct? I do not fully understand what the BF862 / 6N136 and 10K pot do, would mind just explaining that bit about duty cycle please? Thanks :) -- Best regards, Chris mailto:dead.fets@gmail.com