Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,STOX_REPLY_TYPE autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=3 Fuz1=3 Fuz2=3 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 v3AI25vN023778 for ; Mon, 10 Apr 2017 20:02:07 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cxdaf-0006TU-IZ for rs_out_1@blacksheep.org; Mon, 10 Apr 2017 18:59:01 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cxdaf-0006TL-8G for rsgb_lf_group@blacksheep.org; Mon, 10 Apr 2017 18:59:01 +0100 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1cxdac-0000c6-Bn for rsgb_lf_group@blacksheep.org; Mon, 10 Apr 2017 18:59:00 +0100 Received: from AGB ([95.148.100.65]) by mwinf5d41 with ME id 6hyx1v00N1QfCx303hyxdf; Mon, 10 Apr 2017 19:58:58 +0200 X-ME-Helo: AGB X-ME-Date: Mon, 10 Apr 2017 19:58:58 +0200 X-ME-IP: 95.148.100.65 Message-ID: From: "Graham" To: References: <1294128911.20170408174233@gmail.com> <15b4f9773b2-2fd8-bf55@webprd-a08.mail.aol.com> <1316557940.20170410114729@gmail.com> In-Reply-To: <1316557940.20170410114729@gmail.com> Date: Mon, 10 Apr 2017 18:58:57 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: Avast (VPS 170410-0, 10/04/2017), Outbound message X-Antivirus-Status: Clean X-Scan-Signature: 49f0f587e44d6711c57b8a4e950ba850 Subject: Re: LF: Wilkinson combiners Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original 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: O X-Status: X-Keywords: X-UID: 11206 Chris , Push the boat out ... Make qty x 1 [3 way] , or qty x 3 [2-way] 73-G,) -------------------------------------------------- From: "Chris Wilson" Sent: Monday, April 10, 2017 11:47 AM To: "Markus Vester" Subject: Re: LF: Wilkinson combiners > Hello Clemens, Markus, Alan, Graham and all who replied re my combiner > questions, > > Some great and patiently presented info here, thanks a bunch for > explaining it so well and in such detail. I now have a much better > grasp of how the wide and narrow band ones work and why a narrow band > combiner might work best with pre filtered outputs sent to its input. > I will build the W1VD design as I already have ferrites to do this, > before buying hard to get (in the UK) and costly big iron cores for > building a second W1VD LPF bank. If the W1VD combiner is not suitable > I may well buy 3 more iron cores and build a second LPF. I will also > try some low inductance resistors instead of the wire wounds, and look > at the wire wounds with my AIM analyzer. Thanks agin everyone. Off to > mow the lawn or I won't get a lift to and from the pub tonight ;) > > >> Hi Chris, > >> either method should work: two separate T-type lowpass filters >> after each PA will reflect the harmonics before they reach the >> narrowband combiner. Or build Jay's broadband combiner, which will >> pass on the harmonics to the T-lowpass instead of shunting them to >> ground. > >> Best 73, >> Markus (DF6NM) > > > > -- > Best regards, > Chris mailto:dead_fets@gmail.com > > --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus