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Old 7th November 2005, 08:36 PM   #1
dhaen is offline dhaen  Europe
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Default Homemade Vacuum Tube

On this page is an attempt to make one from scratch. Great work!
He has many other interesting projects too.
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Old 8th November 2005, 02:03 AM   #2
Trout is offline Trout  United States
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Oh My, Interesting Stuff,
I Actually did .THIS PROJECT in the 60's as a science fair project in the 7th grade, Got to the state finals & honorable mention.

Our biggest problem was on the receiving end, The Photocell we used picked up to much light from the gymnasium lights and of course the dreaded 60cycle hum was very well amplified.

The following year we built a liquid laser! Mind you that lasers were in their infancy back then. Did I ever mention the effects of a 2 joule cap discharge on a human?

I probly shouldnt tell this story, (unless you all beg) But I will say that it is exactly why kids should NOT play with high voltage devices under the age of 16!

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Old 8th November 2005, 04:16 AM   #3
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There are homemade vacuum tubes being made in Russia and China now that actually look like the real thing! Electroharmonix is one I can think of.
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Old 8th November 2005, 05:06 AM   #4
Trout is offline Trout  United States
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Quote:
Originally posted by rcavictim
There are homemade vacuum tubes being made in Russia and China now that actually look like the real thing! Electroharmonix is one I can think of.


Nawwwwww Valve Art for sure
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Old 8th November 2005, 05:15 AM   #5
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Quote:
Originally posted by Trout




Nawwwwww Valve Art for sure

Do Valve Art also suffer from apparently poor bake out, (leading to) incandescent grid segments and short lifetime issues also?

I NEVER saw such a quality problem trend with NOS tubes from the majors back in the good old days or surviving stock I use today.
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Old 8th November 2005, 08:56 AM   #6
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Here's a better way. Unforch, it's in French.
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Old 8th November 2005, 12:45 PM   #7
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Quote:
Originally posted by Miles Prower
Here's a better way. Unforch, it's in French.
Here's the "engrish" version
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Old 7th August 2006, 10:59 PM   #8
AlekZ is offline AlekZ  Poland
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Hi,

I try to do glass triode. Tommorow I'm going to close bulb
So far I was testing this construction during vacuum pumps working.

There are my vacuum instrumensts:

http://www.trioda.com/php/forum/download.php?id=5355
http://www.trioda.com/php/forum/download.php?id=5353

The pressure is ca. 1*10^-6 Torr (due to diffusion pump).

Triode parameters:

http://www.trioda.com/php/forum/download.php?id=5368
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Old 10th August 2006, 07:04 AM   #9
AlekZ is offline AlekZ  Poland
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Lucky, my tube still alive


http://www.trioda.com/php/forum/download.php?id=5398

I'd like to invite you to my page

http://www.trioda.com/alek/index_e.htm

so far there is poor english version, but I'm going to change it.
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Old 11th August 2006, 03:55 PM   #10
adhoc is offline adhoc  Australia
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AlekZ,

There is some very cool work on your pages - good job!
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