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Old 27th February 2012, 09:25 AM   #1
diyAudio Member
Join Date: Aug 2005
Question Little piece of glass in tube.

Hi guys,

Today I received a shipment of 4 GM-70 tubes.

One of them has a small (1mm) piece of glass rattling around inside.

The getters look intact, and I can't see any cracks in the glass.

Can this hurt?
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Old 27th February 2012, 09:49 AM   #2
DF96 is offline DF96  England
diyAudio Member
Join Date: May 2007
On its own, no. This assumes the glass is clean and non-conducting (e.g. no gettering on it) so it doesn't matter where it lands. However, it may be a sign of a manufacturing fault which could cause trouble.
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Old 27th February 2012, 10:36 AM   #3
diyAudio Member
Join Date: Aug 2005
Yes the glass looks clean. I've looked inside to see where the piece could have broken off but I can't find the spot.
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