Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: Low energy bulbs

To: [email protected]
Subject: Re: LF: Low energy bulbs
From: John Rabson <[email protected]>
Date: Wed, 2 Mar 2011 11:49:26 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Fifty plus soldered joints, and such lamps don't seem to last much longer than tungsten ones here.  I wonder what the whole-life energy costs are compared with filament lamps.

John F5VLF

On 1 Mar 2011, at 23:21CET, M0FMT wrote:

Hi LF
 
If you are a Amateur like me trying to find components the cheap way then this may be for you;-
 
9W Philips so called energy saving SFL
     
ItemComponent
type
Electrical
value
UnitsSpec
1Resistor5Ohm0.125W
2Resistor5Ohm0.125W
3Resistor1Ohm0.125W
4Resistor700000Ohm0.125W
5Resistor387000Ohm0.125W
6Resistor48Ohm0.25W
7Capacitor100nFPoly ?
8Capacitor23nFPoly ?
9Capacitor2.3nFPoly ?
10Capacitor1.6nFPoly ?
11Capacitor2.2 ElecMicro F350Vw
12Inductor2.795mHLaminate  Core
13Inductor2.28mHFerite Cylinder
14Inductor131 (for 9T)micro HToroid R10 N30
15TransistorDK51 Bipolar
16TransistorDK51 Bipolar
17Diode1N40071000V - 1AGen Purp Rectifier
18Diode1N40071000V - 1AGen Purp Rectifier
19Diode1N40071000V - 1AGen Purp Rectifier
20Diode1N40071000V - 1AGen Purp Rectifier
21Diode1N40071000V - 1AGen Purp Rectifier
22Diode1N40071000V - 1AGen Purp Rectifier
23Diode1N40071000V - 1AGen Purp Rectifier
24Diode!N4141Fast switchsmall signal det
 

From this I have made a low power xtal controled Tx for 80m. and the Flurescent tube which always seems to be OK in "Failed" SFLs serves as a fine and spectacular RF indicator when located next to your LF antenna up lead.
Failed SFL units are a useful source of parts to the real Amateur.
Pictures available on request.
 
73 es GL Pete M0FMT IO91UX



From: Stefan Schäfer <[email protected]>
To: [email protected]
Sent: Tue, 1 March, 2011 20:17:59
Subject: Re: LF: Low energy bulbs

Regarding energy bulbs, maybe it is an idea to put a well designed EMI filter into the bulb cable, as close as possible?

73, Stefan/DK7FC

Am 01.03.2011 21:04, schrieb [email protected]:
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
==========


    
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. ---- File information ----------- File: xdv00137.jpg Date: 1 Mar 2011, 19:10 Size: 22457 bytes. Type: JPEG-image




=
<Prev in Thread] Current Thread [Next in Thread>