Return-Path: Received: (qmail 18136 invoked from network); 7 Nov 2003 13:05:30 -0000 Received: from unknown (HELO netmail00.services.quay.plus.net) (212.159.14.218) by mailstore with SMTP; 7 Nov 2003 13:05:30 -0000 Received: (qmail 7221 invoked from network); 7 Nov 2003 13:05:18 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.20) by netmail00.services.quay.plus.net with SMTP; 7 Nov 2003 13:05:09 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AI6GE-0006zK-13 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 07 Nov 2003 13:02:46 +0000 Received: from [152.163.225.99] (helo=imo-r03.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.14) id 1AI6GD-0006z6-1S for rsgb_lf_group@blacksheep.org; Fri, 07 Nov 2003 13:02:45 +0000 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-r03.mx.aol.com (mail_out_v36_r1.1.) id l.19d.1ca91b53 (25098) for ; Fri, 7 Nov 2003 08:02:06 -0500 (EST) From: G0MRF@aol.com Message-ID: <19d.1ca91b53.2cdcf1ce@aol.com> Date: Fri, 7 Nov 2003 08:02:06 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 Subject: LF: Dummy loads at LF Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 1 Content-transfer-encoding: 8bit In a message dated 11/7/03 12:42:28 PM GMT Standard Time, J.R.Moritz@herts.ac.uk writes:

The Vishay RCH50 50W film resistors sold by RS components are pretty
good value at about 2-3 pounds each, and work OK up to HF - but
obviously you need a hefty heatsink as well as the resistors.

Cheers, Jim Moritz
73 de M0BMU

Hello Jim / Gary.

As you say the wirewound types can give a very acceptable return loss at 136kHz and are much cheaper than a 'non inductive type' of similar power.

I have also recently used two of the RCH50 type resistors ( but 100 Ohms) in a wilkinson combiner at 100MHz. - they worked just fine.

73

David G0MRF