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[82.70.254.222]) by smtp.gmail.com with ESMTPSA id x9sm5890784wrb.18.2018.04.12.11.19.42 (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 12 Apr 2018 11:19:42 -0700 (PDT) Date: Thu, 12 Apr 2018 19:19:41 +0100 From: Chris Wilson X-Priority: 3 (Normal) Message-ID: <277967114.20180412191941@gmail.com> To: N1BUG In-Reply-To: <4d214d82-a112-84c7-f9ab-c71941f6689a@n1bug.com> References: <1UQRRBrZ33.5N62o0UWd72@optiplex980-pc> <1b2b034a-404d-8b95-220c-5568950a1918@n1bug.com> <1523452469895.92892@kuleuven.be> <8c1acac6-e271-6398-2768-481298344387@n1bug.com> <1523457751831.88599@kuleuven.be> <612685899.20180411225537@gmail.com> <968686644.20180411232838@gmail.com> <7950E881690348FB8A48C42DD2735F8D@StevePC> <1UQRSH98Tx.2IrTZ1ue7L6@optiplex980-pc> <7FBAA3A0B6C84158BA005CFF09A5A7EA@DELL4> <4d214d82-a112-84c7-f9ab-c71941f6689a@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. 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: Hello Paul, I am looking at your photo of the LPF. The specs say L1 and L3 should have 52 turns, and L2, the centre one, should have 73 turns. i was unable to get 73 turns on the toroid without winding on top of a lower layer, and insulated with Kaptan tape. This made the overall depth quite a bit deeper than L1 and L3. In the photo it looks like the centre toroid overall is no deeper than the end ones, and the amount of bolt thread protruding *LOOKS* the same as the end ones. Your build is so painstakingly neat though, it may be that you have aesthetically made all the toroids look identical. [...] 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: 1708620d3ce65bee0beaaede7929769a 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, I am looking at your photo of the LPF. The specs say L1 and L3 should have 52 turns, and L2, the centre one, should have 73 turns. i was unable to get 73 turns on the toroid without winding on top of a lower layer, and insulated with Kaptan tape. This made the overall depth quite a bit deeper than L1 and L3. In the photo it looks like the centre toroid overall is no deeper than the end ones, and the amount of bolt thread protruding *LOOKS* the same as the end ones. Your build is so painstakingly neat though, it may be that you have aesthetically made all the toroids look identical. http://www.chriswilson.tv/paul-lpf.jpg Thursday, April 12, 2018, 5:42:13 PM, you wrote: > Jay, > When the package arrives I will swap out the caps and the IR2110. If > that doesn't do it I will order a new 74F74 and swap out the > resistors. If all of that fails I don't see anything else I can do. > Realistically at my level of expertise if it doesn't work at that > point I will have reached the end of the road. :-( > The caps I have are KEMET part # R82EC1100Z350J > Here is a link to the datasheet: > https://www.mouser.com/datasheet/2/212/KEM_F3101_R82-1103738.pdf > Paul -- Best regards, Chris mailto:dead.fets@gmail.com