Sticker on power tubes? Harmful?

[Sabertooth]

Hey I bought a groove tubes replacement tube ( ST-6V6-C )
and it has a sticker( label) on the outside with the brandname and such on it. Does this have to be removed? Will it cause problems with the tube? It seems like a very hard thing to do, especially if you cant touch the tube with your bare hands..its stuck on there pretty good.

Thoughts?

EDIT: Sorry actual tube model is 6L6-R(B)

[Jazz P Bass]

Tube sticker

I would have to assume , that whoever decided they needed to place a sticker on a vacuum tube glass envelope, had the sense to use a glue that could withstand the temperatures.
I don't think it will hurt the glass.
Who said you can't touch a vacuum tube.
Your thinking about Halogen lamps.

[Gtr_tech]

I think he means on the base. Thats been std procedure for GT for a long time.
http://www.kcanostubes.com/pictures/...ched-Pair).jpg

[Sabertooth]

No no, the label is actually on the glass, in the place of where the logo usually is. I believe its a new labeling technique.

Yeah I'm going to assume that they used glue that would not cause any problems.

[Enzo]

And there is no rule about touching the glass anyway. That refers to projector lamps. You can;t keave a fingerp[rint on a hot projector bulb or a follow spot bulb, because teh high temperatures will melt the glass. But tubes don;t operarte anywhere near that level of heat. Touch them all you want. Stick tape on them if you want. I always remove tape adn labels from the glass so I don't have to smell them getting hot.

[Sabertooth]

Ok. Thank you so much!

[Tom Phillips]

Tube Sticker can be harmful

Sabertooth,
Your subject line caught my eye.
I witnessed an interesting failure caused by the Groove Tube sticker that they apply to the tube base .
These stickers have a metalized surface.
The failure I saw was caused by a sticker that had slid down under the tube base and the metalized surface caused a short between a couple of the pins. This occurrence is a long shot to be sure but if you work on amps long enough you see a lot of strange things. I figure that the glue was softened by the heat. Since then I have found many loose stickers on the base of groove tubes. If they come loose easily, I just take them off even though the chance of the sticker getting under the tube is slim.

Regards,
Tom

[ThermionicScott]

IME, paper labels stuck to the glass area turn a nice golden brown after some use.

- Scott