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Cutting open vacuum tubes - dangerous?
Cutting open vacuum tubes - dangerous?
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Old 20th September 2019, 09:58 AM   #21
TBTL is offline TBTL  Germany
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Do you plan on making the filament glow? Then you somehow need to restore the vacuum and reseal the tube. The filament needs a vacuum to prevent it from burning out.
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Old 20th September 2019, 12:29 PM   #22
smoking-amp is offline smoking-amp  United States
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Giant fake tube
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Old 21st September 2019, 06:56 AM   #23
hpeter is offline hpeter  Slovakia
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Location: Electrostats or bust
barium/strontium/calcium oxides cathode; barium flash getter; thats the biggest health risk imo. mercury filled tubes are other story.
rest is nickel,copper,carbon,molybden,tungsten,mica,glass.

about beo-its the pink ceramic,like in magnetrons.
..BLOG.. XMOS_U8/PCM5102A > LL1544A > 6H9C+gyrator > 2A3_SOV/JJ > LL1660 > STAX SR207 _ SR L300 _ SR007 # LL2748 > 394A > LC 12H/1000Ķ // 4-125a test
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Old 22nd September 2019, 05:28 PM   #24
opcom is offline opcom  United States
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Originally Posted by Eli Duttman View Post
The white of knackered getters is reactive metal oxide. Add water and the result is alkaline.
Ah a modern city then, but alkali rain instead of acid rain!

P.S. will the hot wire (string) method work on vacuum tube glass? It is more resistant to temp. stresses than a bottle..
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