Re: Using mobile phone as an internet radio

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#35

From: R. Mark Clayton
Date: Sat, 06 Oct 2012 17:23

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"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message 
news:MLqdnZyuL9Izje3NnZ2dnUVZ_omdnZ2d@supernews.com...
SNIP
>>
>> Aren't the filaments welded to the elements at the ends?  It would seem 
>> that
>> this would cause a narrowing.  ISTR most filaments broken near the 
>> supports,
>> which would be counter to the hotter-in-the-middle theory.
>
> The feedthroughs are made of Dumet, which is basically 42Ni stainless with 
> a borated copper coating to bind to the glass.  It's much lower-melting 
> than the tungsten, so spot-welding them together shouldn't affect the 
> tungsten much.

Just crimped over AFAIK.  Should work fine - the softer metal will cold form 
around the tungsten see

http://upload.wikimedia.org/wikipedia/commons/0/08/Filament.jpg

>
> I've never seen one burn out that wasn't energized.

They can, but no very often.

> But you're the big-iron transmitter guy.   Gotta run, I have a bunch of 
> guys coming to the lab in a few minutes, and I have to start the coffee 
> pot!
>
> Cheers
>
> Phil  Hobbs
>
>
> -- 
> Dr Philip C D Hobbs
> Principal Consultant
> ElectroOptical Innovations LLC
> Optics, Electro-optics, Photonics, Analog Electronics
>

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From: "R. Mark Clayton" <nospamclayton@btinternet.com>
Newsgroups: uk.tech.digital-tv,24hoursupport.helpdesk,uk.telecom.mobile,sci.electronics.basics,sci.electronics.repair
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Subject: Re: Using mobile phone as an internet radio
Date: Sat, 6 Oct 2012 18:23:04 +0100
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