Yes.
A gassy tube tends to run hotter. As it does so, it slowly releases oxygen molecules trapped in that shiny deposit on the inside of the glass. As that happens the edges will slowly turn brown, signaling a failure on the horizon.
So if you can see the tube you'll be able to know when its reaching the end of its service life. IOW, I don't see why you can't use them, just keep in mind that they won't last as long. Its not a sure bet that they will damage a resistor- they might just simply fade away.
A gassy tube tends to run hotter. As it does so, it slowly releases oxygen molecules trapped in that shiny deposit on the inside of the glass. As that happens the edges will slowly turn brown, signaling a failure on the horizon.
So if you can see the tube you'll be able to know when its reaching the end of its service life. IOW, I don't see why you can't use them, just keep in mind that they won't last as long. Its not a sure bet that they will damage a resistor- they might just simply fade away.