Return-Path: Received: (qmail 355 invoked from network); 5 Feb 2001 12:53:39 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 Feb 2001 12:53:39 -0000 Received: (qmail 17974 invoked from network); 5 Feb 2001 12:47:39 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 Feb 2001 12:47:39 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14PkwZ-00060c-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 05 Feb 2001 12:40:31 +0000 Received: from lepidachrosite.lion-access.net ([212.19.217.3]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14PkwY-00060X-00 for rsgb_lf_group@blacksheep.org; Mon, 05 Feb 2001 12:40:30 +0000 Received: from w8k3f0 (1Cust228.tnt13.rtm1.nl.uu.net [213.116.120.228]) by lepidachrosite.lion-access.net (I-Lab) with SMTP id 4698CCAE88 for ; Mon, 5 Feb 2001 12:39:59 +0000 (GMT) Message-ID: <004301c08f68$bb18a860$e47874d5@w8k3f0> From: "Dick Rollema" To: "LF-Group" Subject: LF: Interference from fluorescent tube Date: Mon, 5 Feb 2001 12:41:53 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 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: Content-transfer-encoding: 8bit

To All from PA0SE

In my report on signals received over the weekend 27/28 January I mentioned that reception was hampered by noise from a local electric appliance.

Last weekend the noise was there again and I decided to investigate.

Using my portable field strengh meter as a receiver I found the culprit to be a fluorescent tube mounted over the dresser in our kitchen. The noise is already present with the tube switched off and increases upon switching on.

When I remove the tube the noise disappears.

Cleaning the tube on its outside to remove grease and dirt did not help.

As the tube performs normally as a source of light (and being a Dutchman) I don't replace it. Instead I pull its plug when I want to operate.

The tube has been in use for several years already but the noise only recently started.

73, Dick, PA0SE