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Neon
Joined: 04 Feb 2008
Posts: 1512
Location: Dallas, Texas, USA
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 Posted: Fri May 30, 2008 2:04 pm Post subject: Large vacuum tubes (valves) |
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| These tubes were my grandfather's. I think they make an attractive display. When in operation, they supposedly glow red. |
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wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
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| Posted: Fri May 30, 2008 2:27 pm Post subject: |
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pretty nice indeed.
How big compared to a penny?
What were they for? |
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Chiefish
Joined: 23 Sep 2007
Posts: 2153
Location: Northwest N.J. U.S.A
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| Posted: Fri May 30, 2008 3:44 pm Post subject: |
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Those are cool as hell looking, you can tell that it uses blown glass if you look closely, It would be great to see them light up 
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri May 30, 2008 3:56 pm Post subject: |
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The 100TH is a high power triode, used as a high power amplifier or oscillator. 100W plate dissipation.
Nice tube.
The 450TL is the same thing, but up to 450Watts. Really nice tubes.
Length 12.5 inches by 5 inches diameter.
According to the 450TL datasheet, cooling of the 450TL is accomplished by radiation from the plate, which operates at a visible red color at maximum dissipation... |
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Fred Jodry
Joined: 14 Apr 2007
Posts: 107
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| Posted: Tue Dec 02, 2008 10:52 am Post subject: 100-TH and 450-TL |
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| Jac, these tubes can be appreciated even more when displayed operating in a military Shortwave- Mediumwave BC-610 or homemade transmitter and when above a clear set of .gif or similarly filed circuit diagrams. 450-TL modulated by pair, 100-THs, or 450-TH sending Morse code, 100-THs standing by. |
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tlccomp
Joined: 11 May 2006
Posts: 1212
Location: Southeast Wisconsin, USA
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| Posted: Tue Dec 02, 2008 3:12 pm Post subject: |
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Cool stuff
Question... Why do they call them valves?
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Tue Dec 02, 2008 3:46 pm Post subject: |
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| tlccomp wrote: | Cool stuff
Question... Why do they call them valves? |
Valve is the English generic name.. and if you think what a valve does, it controls the flow of something.. thats essentially all valves (tubes) are.. the control of electrons in many strange ways. I am not 100% sure if that is the reason why they are called valves, but it makes sense.
Last edited by JAC on Tue Dec 02, 2008 5:11 pm; edited 2 times in total |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Tue Dec 02, 2008 3:50 pm Post subject: |
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| Other cool names are condensers for capacitors .. erm.. cant think of any more right now.. but there are a few more. Maybe some of the geriatric members can shed more light, its all a bit before my time. |
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Tue Dec 02, 2008 4:20 pm Post subject: |
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nice stuff...warning for glass break...as i know this stuff contains very hazarus chemicals for human body..
correct me if im wrong! |
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Tue Dec 02, 2008 4:31 pm Post subject: |
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I like tubes much and also have a few.
But those huge old with round bulb in the middle
I see for the first time... real eye candys! 
Hope they have no radioactive materials inside? 
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Tue Dec 02, 2008 4:34 pm Post subject: |
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| kosmokrator wrote: | nice stuff...warning for glass break...as i know this stuff contains very hazarus chemicals for human body..
correct me if im wrong! |
Radon, mercury vapor.... sniff sniff 
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Tue Dec 02, 2008 4:34 pm Post subject: |
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lol...maby they have...
some have mercury gas and some strange chemicals....like phosphorus,barium ect...
btw some today energy efficient glow lamps also have dangerus materials inside...so...i think is everywhere!!! |
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Hippo
Joined: 01 Feb 2006
Posts: 377
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| Posted: Tue Feb 17, 2009 4:12 pm Post subject: |
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| JAC wrote: | | Other cool names are condensers for capacitors... |
Mmmm Wax covered paper condensers that drip wax onto the bottom of your valve radio.... 
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Fred Jodry
Joined: 14 Apr 2007
Posts: 107
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| Posted: Mon Feb 23, 2009 12:03 pm Post subject: Ear- wax condensers. |
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A really neat thing happened to me because of a wax condenser.
At a yard sale I found an Atwater Kent model 555 radio underneath
a bed and was allowed to buy it for $10. Its cabinet, by the way,
looks just like the cabinet of an Edison vintage 1920 cylinder phono
graph. When I opened it I found that a leaking wax condenser in the
dead center bottom of the chassis bypassing the cathode of the first
intermediate frequency amplifier stage had leaked and the wax
spread over the entire metal chassis top and bottom, preserving it.
I had a mint condition nickel plated chassis shining like anything
Atwater Kent 555. A museum piece especially because it`s really
small. I have to run it on 95 volts ac not more otherwise it`d burn
up. Sadly, years before, I saw the shiny unmistakable small mud-
red power transformer from an other Atwater Kent 555 on som
eone`s repair shelf as the Radio had not survived into modern times. |
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Fred Jodry
Joined: 14 Apr 2007
Posts: 107
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| Posted: Mon Feb 23, 2009 12:05 pm Post subject: Ear- wax condensers, Atwater Kent model 555, and Edison 1920 |
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| Typograph: that`s Edison vintage 1920, portable, cylinder phonograph. |
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