Return-Path: Received: (qmail 18912 invoked from network); 6 Oct 2002 11:21:18 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 6 Oct 2002 11:21:18 -0000 Received: (qmail 1934 invoked from network); 6 Oct 2002 11:20:44 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 6 Oct 2002 11:20:44 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 17y9S9-0006bl-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 06 Oct 2002 12:20:05 +0100 Received: from [62.253.164.46] (helo=mta6-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.10) id 17y9S9-0006bT-00 for rsgb_lf_group@blacksheep.org; Sun, 06 Oct 2002 12:20:05 +0100 Received: from l8p8y6 ([62.252.232.217]) by mta6-svc.business.ntl.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20021006111951.DKRW9450.mta6-svc.business.ntl.com@l8p8y6> for ; Sun, 6 Oct 2002 12:19:51 +0100 Message-ID: <002201c26d21$e57b3300$d9e8fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org Date: Sun, 6 Oct 2002 11:18:45 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: coil formers Content-Type: text/html; charset=windows-1252 X-Spam-Status: No, hits=0.4 required=5.0tests=SUPERLONG_LINEversion=2.31 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Content-transfer-encoding: 8bit
Hi All
Some stores have a variety of buckets/baskets varying in diameter from a few inches to 15 inches and depth up to 15 inches or more. These devices are sturdy and slotted or at least 50% cut out making good semi air spaced coil formers for LF, much more efficient than any solid plastic type former. These baskets can also be stacked and used in series for those that need more inductance.
The smaller ones fit inside the larger ones and make good variometers.
I got mine from the £ stretcher shop for 90 pence each !!!! There are various colours but I use white when possible and so far no melt down or signs of distortion due to high RF voltages.
They make a tidy job, look good.
For insulators that will withstand high RF voltages and only cost a few pence use crab/lobster pot spinners, these are white plastic material, figure of 8 construction and strong about 4 inches long and 1-1/2 inches wide. These are available from ships chandlers at fishing ports and cost about 50 pence each, also in the same shops there are a variety of marine plastic ropes any diameter and up to 200 metres in length, ideal for antenna support work.
 
Antenna wire is available from electrical shops on industrial estates at reasonable prices usually in 100 - 200 metre rolls.  I use insulated wire, various colours and usually 2.5 mm stranded although 1.5 mm up to 10 mm is usually available. This wire also makes good  insulated ground radials
 
Everything that a LF experimenter needs is readily available and at the right price!!!
 
When you get tired of LF you will have enough wire to go into the electrical wiring business, enough lobster pot spinners and baskets to go fishing and enough rope to hang everyone that took a dislike to you while LFing.
 
73 de Mal/G3KEV
 
 
Have fun de Mal/G3KEV