Stupid Question: How to take out tubes??

Dennis the Menace...They supposed can cut short the life span of the tube...but honestly, I do not know the chemical reaction and how the fingerprint grease can get into the vacuum inside of the tube, therefore, I am still puzzled at the advice.

If audio tubes have the same concept as regular light bulbs...then, I cannot tell. My lightbulbs have fingerprints on them, but they seem to work fine.

Close faucet prior using channel lock wrench.

Fingerprints and residual oils: The reason is that the oil on glass versus clean glass alone causes differential heating, and a more unstable environment, and the tubes (or halogen bulbs) are potentially prone to a shorter life.

Just my $.02.

Barton

Fingerprints on tubes.. Bogus nonsense !!! .................

Vacuum tubes are not halogen bulbs. You can get your grimy oily fingerprints on them all you want with no ill effects.

Just wiggle the tube slighly while pulling upward on it to remove the tube. It's not rocket science and again, don't worry about handling vacuum tubes with your bare hands - unless the tubes are still hot!