Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_MED,SPF_PASS, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: dcc1: mailn 1182; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v2OJPvcd001328 for ; Fri, 24 Mar 2017 20:25:59 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1crUeH-0004gC-4Q for rs_out_1@blacksheep.org; Fri, 24 Mar 2017 19:13:21 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1crUeF-0004g3-2a for rsgb_lf_group@blacksheep.org; Fri, 24 Mar 2017 19:13:19 +0000 Received: from mail-wm0-x242.google.com ([2a00:1450:400c:c09::242]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-ECDSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1crUeC-0007s0-DH for rsgb_lf_group@blacksheep.org; Fri, 24 Mar 2017 19:13:17 +0000 Received: by mail-wm0-x242.google.com with SMTP id u132so2455933wmg.1 for ; Fri, 24 Mar 2017 12:13:16 -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=20161025; h=from:date:message-id:to:subject:mime-version :content-transfer-encoding; bh=XkPRPj2MGztdkYnMPyhfK7noe9cWYVa264K170W9JAQ=; b=KZctSO9QZWaP61YOERUdygC1UP7ZWDinmuP2JrEtgrw1nXM/VA9ST72VIXexIWoRLQ NNa/8PZ++FTkWxXHv5AWu46MN0O7oIHF61/QXJBfFtTAhzw9I8Qh5cBO2Y51HDOnHpHZ YT8jLugXytIVwyOCEQx6cOM+Y2XpkYszPZ80OMe59d27l4I/ZVGa+dThFsKokkcVgHuc FsmubdvEWNJw0QKvP5gvGxp7KEq3kQ2NmhspYwoZcdFPntXMk8mBaWzBGIpL2sPEWx+k w+mNrnJGCrUlCF+RyX/KkU7hBfFkC7lwgEc2SyGuNujsg9s6uj87gqtIMs1OJGjZVtRs Nv7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:message-id:to:subject:mime-version :content-transfer-encoding; bh=XkPRPj2MGztdkYnMPyhfK7noe9cWYVa264K170W9JAQ=; b=CagNJM/v6pI6WrWg8etNSH2/27ffDruNBWMEi4Iii3+lwj6EaItzs4YxcTDrB1TK9q OjI92XvIrSldaZVhpvsn/pn5fI/WfpoUkf/NkUYE4UQ/PWDhEhN4oIcgk4p8Tf7P/VOO DTc/RO3GNFq5tTW90WauD7VVsU/5ty3AXHbcOprCQ8kNYesdWott6KD0Y25vzWh2V8ra Wr2UwrNMDspCAW9Y37BGEyrTS4+wwtnUIZzwQ5sgTWVhVhwO2pl1AT12LI/gD/9/wZ2k GpfkUa018yb+ij5B3lRFXr/Scwt0R2/AhTCS7y1reHeZ8gW8v7QXvFVsH68uEk2IHjI+ AgrA== X-Gm-Message-State: AFeK/H2Y1/SD/T3PrLUO/sCD8v/XAXCAPCw0qIbNZ/AQBuc8qd48zTowWJJZoz/viroF5g== X-Received: by 10.28.111.3 with SMTP id k3mr4621682wmc.39.1490382795237; Fri, 24 Mar 2017 12:13:15 -0700 (PDT) Received: from OfficeWin7.lan (82-70-254-222.dsl.in-addr.zen.co.uk. [82.70.254.222]) by smtp.gmail.com with ESMTPSA id u7sm3948338wru.56.2017.03.24.12.13.14 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 24 Mar 2017 12:13:14 -0700 (PDT) From: Chris Wilson X-Google-Original-From: Chris Wilson Date: Fri, 24 Mar 2017 19:13:13 +0000 X-Priority: 3 (Normal) Message-ID: <1571552606.20170324191313@gmail.com> To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Scan-Signature: 4d4a9e8f68fb15c54898568240f542c5 Subject: LF: Stacking toroids Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 10996 Hello LF people, If I have a ferrite toroidal output transformer for a push pull Class D 136kHz amp, that gets warmish after a WSPR15 session, what would happen if I wound the same number of primary and secondary turns on two cores stacked together, all else remaining the same? Would it run cooler, but retain its transformation ratio, or would other things occur to make it not that simple? Thanks. -- Best regards, Chris 2E0ILY mailto:dead_fets@gmail.com