✅ SOLVED Neon tubes? Vaccuum tubes? or other?

pa plateau hiker

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I got these at an auction. The guy was involved with neon tubes and vacuum tubes. Other glass viles have red wire in them. They are 6" long. Probably an obsolete item. Any ideas?
 

alan m

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Those are vacuum tube leads, the dark band area is probably platinum or palladium coated, it is where the seal to the glass is formed, these are parts as seen before the tube is manufactured and then sealed inside the evacuated glass envelope. Very cool find.
 
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pa plateau hiker

pa plateau hiker

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Thanks, so I guess they are worthless since vacuum tubes aren't manufactored anymore.
 
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piegrande

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Ahem, in Russia. My son-in-law got interested in tubes after I gave him my 1960's RCA tube manual. He started doing repairs on vacuum tube stereos selling for thousands of dollars, owned by rich audiiophiles. I worked in a very high tech electronic factorys, retired in 1997. The Apache helicopter cockpit display unit we a traditional vacuum tube type CRT, and new guys coming out of electronic school had no idea what they were doing.
 
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alan m

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Thanks, so I guess they are worthless since vacuum tubes aren't manufactored anymore.
On the contrary, they are worth something to the right person.
getting the metal to glass bond to seal properly was a difficult task as the rate of contraction when cooling is so much different between glass and metal. What usually occurred was the glass would crack ruining the seal.
later on in tube development, uranium glass was used for the base, that worked, somewhat.
some people today attempt to make special tubes, “Morey” tubes, they would have a real need for those wires.
 
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whistler84

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Thats pretty cool. Is there a part # anywhere? Could lead u to a particular type.
 
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