Terry Pinnell
Guest
Wed Apr 27, 2011 11:56 am
Does anyone know where I can buy 'normal' filament lamp bulbs in the UK
please? I just cannot get on with the new economy type. My remaining stock
of 60W and 100W is dwindling rapidly.
--
Terry, East Grinstead, UK
Ian Field
Guest
Thu Apr 28, 2011 5:04 pm
"Terry Pinnell" <terrypingm_at_DELETEgmail.com> wrote in message
news:0t0gr612cvfi6ctfrv4km7supmeefjhkah_at_4ax.com...
Quote:
Does anyone know where I can buy 'normal' filament lamp bulbs in the UK
please? I just cannot get on with the new economy type. My remaining stock
of 60W and 100W is dwindling rapidly.
Apparently its become illegal to sell the higher wattages anymore - try ebay
and/or various other mail order sources.
The vast majority of failures occur at switch on due to the surge current at
that instant, some TVs, monitors and other switch mode power supplies have a
negative temperature coefficient thermistor in series with the fuse to limit
turn on surge - a salvaged NTC thermistor grafted into behind the switch
plate with an insulated connector block will substantially increase the life
expectancy of filament bulbs.
nospam
Guest
Thu Apr 28, 2011 8:33 pm
"Ian Field" <gangprobing.alien_at_ntlworld.com> wrote:
Quote:
The vast majority of failures occur at switch on due to the surge current at
that instant, some TVs, monitors and other switch mode power supplies have a
negative temperature coefficient thermistor in series with the fuse to limit
turn on surge - a salvaged NTC thermistor grafted into behind the switch
plate with an insulated connector block will substantially increase the life
expectancy of filament bulbs.
No it won't. A worn out filament may well fail during a turn on surge.
Avoiding the surge can only delay the inevitable for a short time.
A significant life expectancy increase can only come from avoiding
something that wears out the filament and turn on surges don't.
Ian Field
Guest
Thu Apr 28, 2011 9:13 pm
"nospam" <nospam_at_please.invalid> wrote in message
news:50ijr6l5t7iahfvf259tpoetu91rioietq_at_4ax.com...
Quote:
"Ian Field" <gangprobing.alien_at_ntlworld.com> wrote:
The vast majority of failures occur at switch on due to the surge current
at
that instant, some TVs, monitors and other switch mode power supplies have
a
negative temperature coefficient thermistor in series with the fuse to
limit
turn on surge - a salvaged NTC thermistor grafted into behind the switch
plate with an insulated connector block will substantially increase the
life
expectancy of filament bulbs.
No it won't. A worn out filament may well fail during a turn on surge.
Avoiding the surge can only delay the inevitable for a short time.
A significant life expectancy increase can only come from avoiding
something that wears out the filament and turn on surges don't.
You're neglecting the effect of the small volt drop that sustains the NTC in
a heated state, published curves clearly show that underrunning filament
bulbs by even a small amount gives a significant increase in life
expectancy.
The combined effect of that and almost completely eliminating the turn on
surge is very significant - I know for a fact, I've tried it.
Werner
Guest
Fri Apr 29, 2011 7:56 pm
On 27/04/11 19:56, Terry Pinnell wrote:
Quote:
Does anyone know where I can buy 'normal' filament lamp bulbs in the UK
please? I just cannot get on with the new economy type. My remaining stock
of 60W and 100W is dwindling rapidly.
Urrm, a very well informed source has told me 2 weeks ago that they are
no longer marketed as light bulbs but as "heating elements". Seriously.
I'm not making this up.
Maybe you start looking for heating elements with an E17 thread.
Hope it helps
Werner Dahn
Ian Field
Guest
Fri Apr 29, 2011 8:19 pm
"Werner" <wdahn_at_netfront.net> wrote in message
news:ipf54m$93k$1_at_adenine.netfront.net...
Quote:
On 27/04/11 19:56, Terry Pinnell wrote:
Does anyone know where I can buy 'normal' filament lamp bulbs in the UK
please? I just cannot get on with the new economy type. My remaining
stock
of 60W and 100W is dwindling rapidly.
Urrm, a very well informed source has told me 2 weeks ago that they are no
longer marketed as light bulbs but as "heating elements". Seriously. I'm
not making this up.
Maybe you start looking for heating elements with an E17 thread.
Most UK houshold lightbulbs have bayonet caps.
