Return-Path: Received: (qmail 12328 invoked from network); 1 Jul 2001 23:41:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 1 Jul 2001 23:41:49 -0000 Received: (qmail 21423 invoked from network); 1 Jul 2001 23:40:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 1 Jul 2001 23:40:40 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15GqkE-0005eZ-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 02 Jul 2001 00:35:14 +0100 Received: from hermes-2.bizonline.net ([212.95.128.6] helo=publiconline.co.uk) by post.thorcom.com with smtp (Exim 3.16 #2) id 15GqkD-0005eU-00 for rsgb_lf_group@blacksheep.org; Mon, 02 Jul 2001 00:35:13 +0100 Received: (qmail 2445 invoked from network); 1 Jul 2001 23:34:01 -0000 Received: from unknown (HELO default) (213.108.24.123) by hermes-2.bizonline.net with SMTP; 1 Jul 2001 23:34:01 -0000 Message-ID: <002601c10286$80fe30a0$7b186cd5@default> From: "Julian Hardstone" To: rsgb_lf_group@blacksheep.org References: <3B3B1418.21239.91CEAE@localhost> <001001c10065$b8b8cbe0$5b1b6cd5@default> Subject: LF: Re: 12in Pipe Date: Mon, 2 Jul 2001 00:35:05 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: ByTheWay, un-plasticised PVC has ideal dielectric properties for HF and below. I once wound similar coils on two formers, one of UPVC and one of stout cardboard, and measured the Q (at ~3MHz IIRC). The UPVC was much better, with a good value. Any takers? >A factory renovation has resulted in some 315mm dia. UPVC pipe, with 6mm >wall thickness, being thrown out. If anyone wants some for a coil former, >let me know quickly, before the skip goes. Will saw to length, you will have >to pay post or collect. > >Julian G3TFR, Stockport.