Little piece of glass in tube.

mace1337 · 27th February 2012, 09:25 AM

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?

DF96 · 27th February 2012, 09:49 AM

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.

mace1337 · 27th February 2012, 10:36 AM

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.

27th February 2012, 09:25 AM	#1
mace1337 diyAudio Member Join Date: Aug 2005	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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27th February 2012, 09:49 AM	#2
DF96 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.

27th February 2012, 10:36 AM	#3
mace1337 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.