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=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; 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 v3LIx27a030336 for ; Fri, 21 Apr 2017 20:59:03 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d1diN-0005eh-Ix for rs_out_1@blacksheep.org; Fri, 21 Apr 2017 19:55:31 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d1diM-0005eY-Ot for rsgb_lf_group@blacksheep.org; Fri, 21 Apr 2017 19:55:30 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d1diK-0002RJ-5x for rsgb_lf_group@blacksheep.org; Fri, 21 Apr 2017 19:55:29 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id E3E0D20BCC for ; Fri, 21 Apr 2017 20:55:25 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3w8lL46htCz109l for ; Fri, 21 Apr 2017 20:55:24 +0200 (CEST) Message-ID: <58FA559C.1060500@posteo.de> Date: Fri, 21 Apr 2017 20:55:24 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <11510559084.20170421191030@gmail.com> In-Reply-To: <11510559084.20170421191030@gmail.com> X-Scan-Signature: bb61bee384896e075004ae5ec954ddd2 Subject: Re: LF: Dummy load testing without LPF? Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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: 11422 Hi Chris, Without the LPF, it is even less critical because there is a pure resistive load for the whole output spectrum. So just do it... 73 from JN49KL09AB Stefan Am 21.04.2017 20:10, schrieb Chris Wilson: > Hello LF'ers, > > > Push pull output, Class D low frequency (136kHz) RF amp, circa 500 > Watts. If I want to test it for a few hours into a dummy load does it > matter if the low pass filter network usually used is not between the > output transformer and the dummy load? I want to leave it running > overnight and I am modding the LPF and it's in bits until next week. > Thanks. > > >