Return-Path: Received: (qmail 25189 invoked from network); 23 Oct 2002 07:38:17 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 23 Oct 2002 07:38:17 -0000 Received: (qmail 22848 invoked from network); 23 Oct 2002 07:37:30 -0000 X-MSMail-Priority: High Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 23 Oct 2002 07:37:30 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 184G4T-0001km-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 23 Oct 2002 08:36:53 +0100 Received: from [212.1.130.1] (helo=smtp-1.visp.telinco.net) by post.thorcom.com with esmtp (Exim 4.10) id 184G4T-0001kd-00 for rsgb_lf_group@blacksheep.org; Wed, 23 Oct 2002 08:36:53 +0100 Received: from [212.1.152.39] (helo=standalone) by smtp-1.visp.telinco.net with smtp (Exim 3.32 #1) id 184Fzh-0007Zt-00 for rsgb_lf_group@blacksheep.org; Wed, 23 Oct 2002 08:31:57 +0100 Received: by localhost with Microsoft MAPI; Wed, 23 Oct 2002 08:35:58 +0100 Message-ID: <01C27A6F.35E27FB0.g4jnt@thersgb.net> From: "Andy talbot" To: rsgb_lf_group@blacksheep.org Date: Wed, 23 Oct 2002 08:35:56 +0100 Importance: high X-Priority: 1 X-Mailer: Microsoft Internet E-mail/MAPI - 8.0.0.4211 MIME-Version: 1.0 Subject: LF: RE: Re: Re: Vacuum tubes on Motherboards... Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=1.2 required=5.0tests=SPAM_PHRASE_00_01,X_PRIORITY_HIGHversion=2.42 X-Spam-Level: * Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Does the 4CX250 know that ? The screens in those can be blown as quickly as any transistor if you get an anode to screen arc-over. I've seen 24 '250 valves in a big ship transmitter blown in a single bang. Andy G4JNT There is of course another advantage to the thermionic device. It is more robust than a large number of transistors. One of my colleagues described the power transistor as "the fastest fuse known to man".