Return-Path: Received: from mtain-mj04.r1000.mx.aol.com (mtain-mj04.r1000.mail.aol.com [172.21.164.88]) by air-mc01.mail.aol.com (v129.4) with ESMTP id MAILINMC014-a8ce4d7354791cc; Sun, 06 Mar 2011 04:31:37 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mj04.r1000.mx.aol.com (Internet Inbound) with ESMTP id C86F038000085; Sun, 6 Mar 2011 04:31:35 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PwAIX-0005aV-37 for rs_out_1@blacksheep.org; Sun, 06 Mar 2011 09:30:45 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PwAIW-0005aM-8m for rsgb_lf_group@blacksheep.org; Sun, 06 Mar 2011 09:30:44 +0000 Received: from filter02.i-online.fr ([195.200.78.9]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PwAIT-0000Kl-Kz for rsgb_lf_group@blacksheep.org; Sun, 06 Mar 2011 09:30:44 +0000 Received: from smtp.qtxt.dns-iol.com ([195.200.78.13]) by filter02.i-online.fr (IceWarp 10.0.7 (2010-02-10)) with ESMTP (SSL) id PMK31530 for ; Sun, 06 Mar 2011 10:30:30 +0100 Received: (qmail 5891 invoked by uid 507); 6 Mar 2011 10:30:31 +0100 Received: from unknown (HELO ?192.168.1.101?) (john.rabson@numeo.fr@217.67.155.178) by smtp.qtxt.dns-iol.com with SMTP; 6 Mar 2011 10:30:31 +0100 From: John Rabson Mime-Version: 1.0 (Apple Message framework v1082) Date: Sun, 6 Mar 2011 10:30:33 +0100 In-Reply-To: <4D6E84C5.6050508@freenet.de> To: rsgb_lf_group@blacksheep.org References: <4D6D4542.28569.16DBCA9@mike.dennison.ntlworld.com> <4D6D514A.4040602@talktalk.net> <4D6E84C5.6050508@freenet.de> Message-Id: X-Mailer: Apple Mail (2.1082) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary=Apple-Mail-8--1025913979 Subject: Re: LF: Low energy bulbs X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039400c89a84d73547721ba X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --Apple-Mail-8--1025913979 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Wolf, Thanks for the info. We have a branch of Aldi in the nearest town. I wi= ll see what they offer. 73 John F5VLF On 2 Mar 2011, at 18:56CET, wolf_dl4yhf wrote: > Just my few pennies worth: >=20 > If you need a QRM-free energy saving lamp, try a mains powered LED.=20 > I have one here, with a pleasant *warm white* tone, which doesn't cause= QRM because it cannot: >=20 > There is only a full-wave rectifier in it, a small capacitor, a current= limiting resistor, and -hold your breath- : > About 80 (!) small white LEDs all connect in series, driven directly fro= m the rectified mains ! >=20 > I removed the outer glass dome because imo the LEDs got a little hot ins= ide, but no problems with it ever since. > Starts immediately at full intensity, and by theory should not suffer fr= om frequently turning it on / off . > Downside: Quite expensive, almost 20 Euros for a single 4 Watt lamp. Ho= pe it lasts forever ;-) >=20 > Cheaper LED lamps were sold at "Aldi" (german food discounter) about a= year ago, only 2.5 Watt, 110 lumen, but also warm colour, QRM-free, and= now serving as 'ambient illumination' for the shack. >=20 > Another "huge" LED I tried was a low-voltage powered white "Monster LED"= by Huey Jann, but I didn't like the colour which is somehow "purplish" : >=20 > http://www.hueyjann.com.tw/self_pages/en/hi_power_led_10w_100w.html >=20 >=20 >=20 > Cheers, > Wolf . >=20 >=20 > Am 01.03.2011 21:04, schrieb qrss@talktalk.net: >>=20 >> I have one CFL at the moment which gives the same pattern on 24kHz. Ove= r the years I have had all makes play up, one decided to wipe out 10MHz,= that was due to a dry joint on a suppression capacitor. Dry joints have= also caused other interference and total failure. I have dismantled seve= ral CFL's, poor soldered joints are rife in them, some components can ofte= n be pulled dry from the PCB. >> Some designs are a nice source of a VLF ring core, material / type unk= nown, I have used them for coupling on two 500kHz / 136kHz multi turn RX= Loops. >>=20 >> As for filament lamps, there is always the classic 'candle bulb effect'= which wipes out analogue TV, I did have the pleasure of finding one of= those in a customers house once. >>=20 >> Eddie G3ZJO >>=20 >> On 01/03/2011 19:13, Mike Dennison wrote: >>>=20 >>> Today I noticed QRM on 136kHz that started when my wife switched a=20 >>> light on in our spare room. It had a low energy bulb by Status, and=20 >>> was marked "11W, 220-240V, 50/60Hz, 100mA". It is described on their= =20 >>> web site as "stick type" and is bayonet fitting. The QRM consisted of= =20 >>> rapidly changing noise sweeping back and forth across the band (see=20 >>> attached pic). >>>=20 >>> I replaced it with a Philips Genie WW287 light which did not seem to= =20 >>> generate any noise. >>>=20 >>> The other low energy lights in the house are General Electric E27-ES= =20 >>> 11W bulb types which are very slow to get to full brightness, but are= =20 >>> low QRM at LF. The rest are ancient filament types which are=20 >>> completely QRM-free of course. >>>=20 >>> So if you have this noise, perhaps it's one of your light bulbs. >>>=20 >>> Mike, G3XDV >>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>=20 >>>=20 >>>=20 >>> The following section of this message contains a file attachment >>> prepared for transmission using the Internet MIME message format. >>> If you are using Pegasus Mail, or any other MIME-compliant system, >>> you should be able to save it or view it from within your mailer. >>> If you cannot, please ask your system administrator for assistance. >>>=20 >>> ---- File information ----------- >>> File: xdv00137.jpg >>> Date: 1 Mar 2011, 19:10 >>> Size: 22457 bytes. >>> Type: JPEG-image >>=20 >=20 --Apple-Mail-8--1025913979 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=us-ascii Wolf,

Thanks  for the info.  We have a branch of Aldi in the nearest town.  I will see what they offer.

73
John F5VLF

On 2 Mar 2011, at 18:56CET, wolf_dl4yhf wrote:

Just my few pennies worth:

If you need a QRM-free energy saving lamp, try a mains powered LED.
I have one here, with a pleasant *warm white* tone, which doesn't cause QRM because it cannot:

There is only a full-wave rectifier in it, a small capacitor, a current limiting resistor, and -hold your breath- :
About 80 (!) small white LEDs all connect in series, driven directly from the rectified mains !

I removed the outer glass dome because imo the LEDs got a little hot inside, but no problems with it ever since.
Starts immediately at full intensity, and by theory should not suffer from frequently turning it on / off .
Downside: Quite expensive, almost 20 Euros for a single 4 Watt lamp.  Hope it lasts forever ;-)

Cheaper LED lamps were sold at "Aldi" (german food discounter) about a year ago, only 2.5 Watt, 110 lumen, but also warm colour, QRM-free, and now serving as 'ambient illumination' for the shack.

Another "huge" LED I tried was a low-voltage powered white "Monster LED" by Huey Jann, but I didn't like the colour which is somehow "purplish" :

http://www.hueyjann.com.tw/self_pages/en/hi_power_led_10w_100w.html



Cheers,
   Wolf .


Am 01.03.2011 21:04, schrieb qrss@talktalk.net:
I have one CFL at the moment which gives the same pattern on 24kHz. Over the years I have had all makes play up, one decided to wipe out 10MHz, that was due to a dry joint on a suppression capacitor. Dry joints have also caused other interference and total failure. I  have dismantled several CFL's, poor soldered joints are rife in them, some components can often be pulled dry from the PCB.
 Some designs are a nice source of a VLF ring core, material / type unknown, I have used them for coupling on two 500kHz / 136kHz multi turn RX Loops.

As for filament lamps, there is always the classic 'candle bulb effect' which wipes out  analogue TV, I did have the pleasure of finding one of those in a customers house once.

Eddie G3ZJO

On 01/03/2011 19:13, Mike Dennison wrote: 
Today I noticed QRM on 136kHz that started when my wife switched a 
light on in our spare room. It had a low energy bulb by Status, and 
was marked "11W, 220-240V, 50/60Hz, 100mA". It is described on their 
web site as "stick type" and is bayonet fitting. The QRM consisted of 
rapidly changing noise sweeping back and forth across the band (see 
attached pic).

I replaced it with a Philips Genie WW287 light which did not seem to 
generate any noise.

The other low energy lights in the house are General Electric E27-ES 
11W bulb types which are very slow to get to full brightness, but are 
low QRM at LF. The rest are ancient filament types which are 
completely QRM-free of course.

So if you have this noise, perhaps it's one of your light bulbs.

Mike, G3XDV
==========




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   ---- File information -----------
     File:  xdv00137.jpg
     Date:  1 Mar 2011, 19:10
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