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[82.70.254.222]) by smtp.gmail.com with ESMTPSA id 64sm1116756edh.79.2018.04.09.21.51.33 (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 09 Apr 2018 21:51:33 -0700 (PDT) Date: Tue, 10 Apr 2018 05:51:32 +0100 From: Chris Wilson X-Priority: 3 (Normal) Message-ID: <18762968.20180410055132@gmail.com> To: N1BUG In-Reply-To: <6832cf3c-a6e3-7b11-79dd-95f42cd9bcee@n1bug.com> References: <162a4797468-1db9-bdf2@webjas-vae168.srv.aolmail.net> <1UQROqZht1.1c1VdzC0S69@optiplex980-pc> <3a0c0669-018b-13a7-b56b-dd3f63fab464@n1bug.com> <197556217.20180409124931@gmail.com> <37574432-b72e-f2d1-0e85-af19dd970817@n1bug.com> <4D19B3707137430CBE04857FBA5C80B1@gnat> <1b882ae9-fede-3ec4-256e-9b068d3acf99@n1bug.com> <1539CCA16B9A4092972CB000BE4C440A@DELL4> <7606DCC26D954BD1AE881D54F9F2894A@DELL4> <6832cf3c-a6e3-7b11-79dd-95f42cd9bcee@n1bug.com> 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. 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Content preview: Hello Paul These are what I used, cheaper from Bulgaria, or Russia: https://www.ebay.co.uk/itm/Silver-Mica-Capacitor-Glass-Silvered-Mica-Military-Cap-Various-Values/120797139825?hash=item1c20121371:m:mwvrEzj9o01auqb5AmhytPg [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 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: e6de17d69e46ff4ea8db042ef2cd7e46 Subject: Re: LF: W1VD amp help - more waveforms 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 Paul These are what I used, cheaper from Bulgaria, or Russia: https://www.ebay.co.uk/itm/Silver-Mica-Capacitor-Glass-Silvered-Mica-Military-Cap-Various-Values/120797139825?hash=item1c20121371:m:mwvrEzj9o01auqb5AmhytPg Tuesday, April 10, 2018, 2:37:37 AM, you wrote: > The core is 78 material. > I tried again with different wire. The winding is somewhat tighter > on the core but definitely not what I was hoping for. Clearly I am > not bringing required skills to the table on constructing this. > Drain waveforms became somewhat asymmetrical with one phase having a > somewhat different shape from the other but peak voltage was > similar... 65V on one side, 63V on the other with 13VDC supply. > I'm sure this was a bad idea but out of curiosity I tried adding > another 500 pf in parallel with the 1500 pf snubber cap on one side > only. Power output and efficiency did not change but peak voltage on > that side dropped a couple of volts. I then increased that side to a > total of 3000 pf. Power output and efficiency has still not changed > at all but peak voltage on that side is down to 50V and it stops > ringing significantly sooner than the other side. Does this suggest > anything other than insanity of the builder? > Paul -- Best regards, Chris mailto:dead.fets@gmail.com