Return-Path: Received: (qmail 4565 invoked from network); 21 Jan 2001 08:51:24 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 21 Jan 2001 08:51:24 -0000 Received: (qmail 22924 invoked from network); 21 Jan 2001 08:45:42 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 21 Jan 2001 08:45:42 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14KG1z-0002w2-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 21 Jan 2001 08:39:23 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from mail-2.tiscalinet.it ([195.130.225.148] helo=mail.tiscalinet.it) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14KG1y-0002vx-00 for rsgb_lf_group@blacksheep.org; Sun, 21 Jan 2001 08:39:22 +0000 Received: from ath650 (62.10.38.59) by mail.tiscalinet.it (5.5.015.5) id 3A5B51DE002514FD for rsgb_lf_group@blacksheep.org; Sun, 21 Jan 2001 08:59:23 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Sun, 21 Jan 2001 08:59:23 +0100 (added by postmaster@mail.tiscalinet.it) Message-ID: <4.1.20010121093625.01db2af0@pop.tiscalinet.it> X-Sender: spin.elec@pop.tiscalinet.it X-Mailer: QUALCOMM Windows Eudora Pro Versione 4.1 Data: Sun, 21 Jan 2001 09:39:05 +0100 To: rsgb_lf_group@blacksheep.org From: "IK1ODO" Subject: Re: LF: Re: Re: Loading Coils In-reply-to: <002601c08322$5f071400$a69801d4@g4jnt> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In 10.33 21/01/01 , Andy wrote: > It is very straightforward to find if any material intended for an >insulator or for placing near loading coils is itself lossey. Just put it >in a microwave cooker for a few minutes. If it gets hot or catches fire it >may absorb something at 137k. I've yet to find ANY plastic that gets warm. >Plywood is terrible, it got too hot to touch after 20 seconds > Some PVC tubing gets warm. And about the plywood, it is glued curing the glue with RF (hundred of kW per m2, frequencies around 1-3 MHz). If anyone is interested I have many used triodes for that purpose ... up to 500 kW RF out ... 73, Marco IK1ODO