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Power tube disposal




 
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Author Topic: Power tube disposal  (Read 257 times)
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K8DI
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« on: September 15, 2023, 03:37:41 PM »

What’s the right way to dispose of dud/bad power tubes with thoriated tungsten filaments?

I was gifted a big box full of used 4PR400C tubes that were maintenance pulls from a laser metal cutting machine at some long-closed factory. Half of them have very low emission (3kV on the plate, no bias, draws 150mA). Some are shorted.  A few have some life left, and I’ll keep those.  But what do I do with the bad ones? Tossing them in the trash seems irresponsible…

Ed
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Ed, K8DI, warming the air with RF, and working on lighting the shack with thoriated tungsten and mercury vapor...
KL7OF
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« Reply #1 on: September 15, 2023, 05:16:24 PM »

"Thoriated tungsten TIG welding electrodes are not considered dangerous and may be disposed of in the trash"
  This refers to 2% and 3% Thoriated electrodes that range in diameter from .030 to .125.  I believe there are larger diameters as well.  I haven't  found any recommendations for tube disposal
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W7TFO
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« Reply #2 on: September 15, 2023, 06:19:57 PM »

I take all my 4-400 or 4-1000 no emission duds to a hamfest, and sell them for $2.00 as desk lamps.

Keeps them out of the trash...

It has bought me lots of coffee & donuts over the years.

73DG

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Pete, WA2CWA
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« Reply #3 on: September 15, 2023, 06:49:33 PM »

Target Practice
"Specialty" lamp mounted in wood base
Snow Globe
Random color blinking light show display
"Hammer Time"
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Pete, WA2CWA - "A Cluttered Desk is a Sign of Genius"
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