Omega Owners Forum

Chat Area => General Discussion Area => Topic started by: LFF64 on 27 October 2010, 12:13:27

Title: Why ?
Post by: LFF64 on 27 October 2010, 12:13:27

Can anyone tell me why lamps/bulbs go black/silvery inside .
Is it over voltage ie excessive temp or maybe a leak allowing air in Any suggestions  :D

Title: Re: Why ?
Post by: Kevin Wood on 27 October 2010, 12:18:40

It's the metal filament gradually evaporating and being deposited on the inside of the glass envelope.

Kevin

Title: Re: Why ?
Post by: cem_devecioglu on 27 October 2010, 12:35:10

Quote

It's the metal filament gradually evaporating and being deposited on the inside of the glass envelope.

Kevin

 :y

Title: Re: Why ?
Post by: LFF64 on 27 October 2010, 13:11:57

Thanks Kevin
But what causes this  :question

Title: Re: Why ?
Post by: Mr Skrunts on 27 October 2010, 13:16:12

Quote

Thanks Kevin
But what causes this  :question

Old age, sounds like us when we go grey.   :-/

Title: Re: Why ?
Post by: maria on 27 October 2010, 13:32:23

Quote

Quote

Thanks Kevin
But what causes this  :question

Old age, sounds like us when we go grey.   :-/

[/highlight]

You've gone grey skrunts ;D ;D

Title: Re: Why ?
Post by: Sixstring on 27 October 2010, 13:35:39

Or BALD...................................... :'( :'( :'(





(or like me, BOTH.)








Some things are meant to be bald, my head isn't one of them!!

Title: Re: Why ?
Post by: TheBoy on 27 October 2010, 18:05:04

Its age/usage...

Title: Re: Why ?
Post by: maria on 27 October 2010, 18:06:22

Quote

Or BALD...................................... :'( :'( :'(





(or like me, BOTH.)





Some things are meant to be bald, my head isn't one of them!!

[/highlight]


Your not wrong there......


 :-X :-X :-X ;D ;D

Title: Re: Why ?
Post by: MaxV6 on 27 October 2010, 18:18:16

a little more on why.....    based on theory, not sad enough to have done much experimental observation....


evaporation of the element materials...

when you heat something so it's that hot, some of the material is evaporated....   heat is basically highly agitated molecular movement, the hotter something gets, the eaiser it is for molecules to escape , whether it's a solid or a liquid,  so,  slowly, but surely, material leaves the element,   and since the coolest thing in the bulb is the glass, it condenses on the glass, leaving a fine slivery deposit...

when a filament fails , it would seem a lot more does it at once, i'd surmise that as the filament breaks , so the arcing that happens as it begins to separate, vaporises  fair bit more material quite rapidly,   so the sudden "plating" of the inside of the glass.


of course, if any of this is wildly inaccurate i'd be happy to be corrected.....

Title: Re: Why ?
Post by: tidla on 27 October 2010, 18:39:13

just put a new one in and find something else to do ;D