Return-Path: Received: (qmail 3944 invoked from network); 30 May 2002 23:24:52 -0000 X-Priority: 3 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 30 May 2002 23:24:52 -0000 X-MSMail-Priority: Normal Received: (qmail 16637 invoked from network); 30 May 2002 23:24:30 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 30 May 2002 23:24:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17DZE8-0000Me-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 31 May 2002 00:21:04 +0100 Received: from imo-m10.mx.aol.com ([64.12.136.165]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17DZE7-0000MR-00 for rsgb_lf_group@blacksheep.org; Fri, 31 May 2002 00:21:03 +0100 Received: from G0MRF@aol.com by imo-m10.mx.aol.com (mail_out_v32.5.) id l.11c.11de4ef1 (4248) for ; Thu, 30 May 2002 19:20:48 -0400 (EDT) From: G0MRF@aol.com Message-ID: <11c.11de4ef1.2a280dd0@aol.com> Date: Thu, 30 May 2002 19:20:48 EDT Subject: Re: LF: Decca component To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Mailer: AOL 6.0 for Windows UK sub 10512 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit In a message dated 5/30/02 11:30:54 PM GMT Daylight Time, Datter@btinternet.com writes:

Mike,

I collected 4 spare IRF250 power Mosfets for the Decca TX from the Crawley
Club at the meeting last night and will stick them in the post to you
soonest. I was unable however to find among the remaining bits and pieces
one of the protective MOV devices but similar ones are available from RS or
Farnell distributors

73, de Derek Atter, G3GRO

It should be possible to determine the voltage rating of the MOV from the manufacturers part number in the Decca manual. If the original part is not available I wonder if its possible to remove a working unit from one of the other modules and measure its capacitance and compare the value against a potential replacement. Hopefully minor differencies would not be critical as the MOV is in part of the circuit operating in class D and there should be sufficient drive to mask small changes in capacitance.