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'[EE] DIY vacuum tubes'
2008\01\08@095947 by William Couture

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>From another list I'm on...

---------- Forwarded message ----------

How to make your own vacuum tubes.  Watch all of this.  Really.

http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-triode_tech

--
Psst...  Hey, you... Buddy...  Want a kitten?  straycatblues.petfinder.org

2008\01\08@104544 by Martin

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This is amazing. I've always wanted to try something like this. He has
many many specialized tools though. I wonder how much he charges for his
hand-made triodes.
-
Martin

William Couture wrote:
> >From another list I'm on...
>
> ---------- Forwarded message ----------
>
> How to make your own vacuum tubes.  Watch all of this.  Really.
>
> http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-triode_tech
>
>  

2008\01\08@110632 by Herbert Graf

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On Tue, 2008-01-08 at 09:59 -0500, William Couture wrote:
> >From another list I'm on...
>
> ---------- Forwarded message ----------
>
> How to make your own vacuum tubes.  Watch all of this.  Really.
>
> http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-triode_tech

Amazing. Skill like that isn't as common as it used to be. Sure does
make you appreciate how much WORK it is just to build a diode, the most
basic of active components.

TTYL

2008\01\08@121446 by Alan B. Pearce

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>> >From another list I'm on...
>>
>> ---------- Forwarded message ----------
>>
>> How to make your own vacuum tubes.  Watch all of this.  Really.
>>
>> http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-triode_tech
>
>Amazing.

Sure is. And yet the only really complex bit is the glass blowing. Most of
the rest of it is choosing the correct materials for the job.

>skill like that isn't as common as it used to be. Sure does
>make you appreciate how much WORK it is just to build a diode,
>the most basic of active components.

But it also wouldn't be too hard to expand on his work to make tetrodes and
pentodes. But the most complex would probably be to make an indirectly
heated cathode.

2008\01\08@123346 by Master Yager

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Hi, I can not see it! can some one email it to me at spam_OUTpyager1TakeThisOuTspamgmail.com
Thank you

On Jan 8, 2008 12:13 PM, Alan B. Pearce <.....A.B.PearceKILLspamspam@spam@rl.ac.uk> wrote:

{Quote hidden}

> -

2008\01\08@125434 by Dario Greggio

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Alan B. Pearce wrote:

> Sure is. And yet the only really complex bit is the glass blowing. Most of
> the rest of it is choosing the correct materials for the job.

If you lived in Venice then you probably could :))

--
Ciao, Dario

2008\01\08@131107 by Martin

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Dario Greggio wrote:
> Alan B. Pearce wrote:
>
>  
>> Sure is. And yet the only really complex bit is the glass blowing. Most of
>> the rest of it is choosing the correct materials for the job.
>>    
>
> If you lived in Venice then you probably could :))
>
>  
I have heard that it is difficult to find the proper wire feedthroughs
that go pass through the glass envelope. The glass work would be
challenging but I think easy with several hours of practice.
-
Martin

2008\01\08@131905 by Dr Skip

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Actually chemists (or their assistants) do much the same to make custom labware
and lots of hobbyists do similar in glass beadmaking, etc. He's got some neat
tools to make it production, but a torch and carbon blocks are all you need...
and to remember to anneal along the way, as he does... ;-)


Dario Greggio wrote:
> Alan B. Pearce wrote:
>
>
> If you lived in Venice then you probably could :))
>

2008\01\08@132133 by Herbert Graf

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On Tue, 2008-01-08 at 13:10 -0500, Martin wrote:
> Dario Greggio wrote:
> > Alan B. Pearce wrote:
> >
> >  
> >> Sure is. And yet the only really complex bit is the glass blowing. Most of
> >> the rest of it is choosing the correct materials for the job.
> >>    
> >
> > If you lived in Venice then you probably could :))
> >
> >  
> I have heard that it is difficult to find the proper wire feedthroughs
> that go pass through the glass envelope. The glass work would be
> challenging but I think easy with several hours of practice.

I experimented a bit with glass work, I found it really fun. It
certainly requires a good amount of patience, and experience. Oh, and
the burning yourself part isn't fun either.

TTYL


2008\01\08@133254 by Bob Blick

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--- Herbert Graf <mailinglist4spamKILLspamfarcite.net> wrote:
> It
> certainly requires a good amount of patience, and
> experience. Oh, and
> the burning yourself part isn't fun either.

Sort of like lead-free soldering. That stuff is hot!

Cheerful regards,

Bob

2008\01\08@134331 by M. Adam Davis

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There are many places in the US that teach glassblowing, but primarily
with the aim of art or decoration rather than lab glassware.  My
brother really enjoyed learning glassblowing, and would love to keep
doing it as a hobby.

As far as the glass metal interface, my understanding is that platinum
(expensive!) has a very similar expansion profile to glass, so the
interface isn't leaky or under stress - though again the annealing is
important.  I think I've seen/heard of electrodes embedded in
preformed ceramic beads that you can embed much more easily than bare
wire.  Would be interesting to work in a sign shop for a few months to
play with the relatively simple glass work they do.

-Adam

On 1/8/08, Martin <.....martinKILLspamspam.....nnytech.net> wrote:
{Quote hidden}

> -

2008\01\08@143142 by Herbert Graf

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On Tue, 2008-01-08 at 10:32 -0800, Bob Blick wrote:
> --- Herbert Graf <EraseMEmailinglist4spam_OUTspamTakeThisOuTfarcite.net> wrote:
> > It
> > certainly requires a good amount of patience, and
> > experience. Oh, and
> > the burning yourself part isn't fun either.
>
> Sort of like lead-free soldering. That stuff is hot!

It's been a while since I've burned myself soldering electronics, but
I've had lots of close calls...

That said, I've burned myself a number of times doing plumbing work. I'm
too used to heating small parts that you can touch after a minute of
cooling, plumbing pipes are still more then hot enough to burn you after
only a minute... :(

TTYL

2008\01\08@172720 by Spehro Pefhany

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Quoting "M. Adam Davis" <stienmanspamspam_OUTgmail.com>:

> There are many places in the US that teach glassblowing, but primarily
> with the aim of art or decoration rather than lab glassware.  My
> brother really enjoyed learning glassblowing, and would love to keep
> doing it as a hobby.
>
> As far as the glass metal interface, my understanding is that platinum
> (expensive!) has a very similar expansion profile to glass, so the
> interface isn't leaky or under stress - though again the annealing is
> important.  I think I've seen/heard of electrodes embedded in
> preformed ceramic beads that you can embed much more easily than bare
> wire.  Would be interesting to work in a sign shop for a few months to
> play with the relatively simple glass work they do.
>
> -Adam

What's wrong with using Dumet?  (eg. US 1140136)

Best regards,
Spehro Pefhany

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2008\01\09@093056 by Martin

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I'm sure it's great, the problem being that it is difficult to get
anything less than production quantity of such an item.
-
Martin

Spehro Pefhany wrote:
> What's wrong with using Dumet?  (eg. US 1140136)
>
> Best regards,
> Spehro Pefhany
>
>  

2008\01\09@102706 by Spehro Pefhany

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Quoting Martin <KILLspammartinKILLspamspamnnytech.net>:

(re Dumet)

> I'm sure it's great, the problem being that it is difficult to get
> anything less than production quantity of such an item.
> -
> Martin


This gent was able to buy a single spool of it, and gives a source:-

http://www.rhunt.f9.co.uk/Glass_Blowing/Glass_Blowing_Menu.htm

If anyone gets a quote from them, I'd be interested in the price.

Best regards,
Spehro Pefhany
--
"it's the network..."                          "The Journey is the reward"
RemoveMEs...TakeThisOuTspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

2008\01\09@132329 by William \Chops\ Westfield

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On Jan 8, 2008, at 6:59 AM, William Couture wrote:

>
> http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-
> triode_tech
>

Associated web page with lots of additional material (in french):

http://paillard.claude.free.fr/

BillW

2008\01\09@132812 by William \Chops\ Westfield

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On Jan 9, 2008, at 7:26 AM, Spehro Pefhany wrote:

> (re Dumet)

Can you just copper-plate iron/nickel wire?  Copper plating
is relatively simple...

BillW

2008\01\09@141309 by Martin

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William "Chops" Westfield wrote:
> On Jan 9, 2008, at 7:26 AM, Spehro Pefhany wrote:
>
>  
>> (re Dumet)
>>    
>
> Can you just copper-plate iron/nickel wire?  Copper plating
> is relatively simple...
>
> BillW
>
>  
That's a good question. I'll probably never get the ambition to work
with glass, but it's one of those things I'd love to try.
-
Martin

2008\01\09@142301 by A K

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My guess is the thickness ratios of the metals have to be exact so the
expansion rates together match that of glass.  Easier said than done!

Martin wrote:
{Quote hidden}

2008\01\09@183114 by Spehro Pefhany

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At 02:21 PM 1/9/2008, you wrote:
>My guess is the thickness ratios of the metals have to be exact so the
>expansion rates together match that of glass.  Easier said than done!

Perhaps so. Looks like more than 25% of the wire is the Cu cladding.

I think I'd like to minimize the number of variables if I was fiddling
with something like that. ;-)

>Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
spamBeGonespeffspamBeGonespaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com



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