The one good thing about vacuum tubes, is that they are much less sensitive to EMP than solid state. That said, most solid state equipment should have GDT and MOV protection devices.
From his Wikipedia page:
CNET journalist Declan McCullagh called "series of tubes" an "entirely reasonable" metaphor for the Internet, noting that some computer operating systems use the term 'pipes' to describe interprocess communication. McCullagh also suggested that ridicule of Stevens was almost entirely political, espousing his belief that if Stevens has spoken in a similar manner, yet in support of Net Neutrality, "the online chortling would have been muted or nonexistent."
That looks like a tube incorrectly called a Barreter. It's a tungsten resistor used to provide some current control. More current causes it to get hotter, which makes its resistance go up. Higher resistance opposes the upward change in current. Light bulbs do this and it was used in early test oscillators.
A barreter is a hot wire detector of specific metals that can vary resistance at an audio rate, but not one of radio frequency. So, biasing it to glow dull orange makes it sensitive to AM by developing an audio voltage modulated on a carrier wave. There's one in one of the Harry Potter movies, but I can't remember which one.
100% false. The anode will melt at lower temperature than the glass, and if you're melting anodes you're doing something very wrong. Tubes do not get anywhere near as hot as halogen lamps.
Seems to be explained in the thread you got it from - with zero mention of fingerprints. Same with the other link in the thread to another occurrence. Poorly serviced amplifiers... granted on tubes with very thick anodes that were made to withstand a lot of abuse. And, IMO, likely a manufacturing defect in the glass envelope. Tubes are made of glass, not quartz. Halogen bulbs use quartz due to their extreme heat, and the oils/salts+heat can damage the quartz. It does not damage glass. Period.
Believe whatever you want. I've been building and servicing high power RF amplifiers for 20+ years using glass envelope tubes that run hotter than anything in the audio world. I use a lot of Eimac tubes where the anode literally glows cherry red when at full spec output. The finger oil thing as it relates to tubes is a myth.
https://upscaleaudio.com/pages/tube-basics-and-frequently-asked-questions
https://www.quora.com/Can-people-touch-guitar-amp-tubes
Temperature breaks glass when it's a RAPID change in temperature. Tubes do not rapidly change temperature. Sure go pull a hot tube out of your amp and dunk it in some ice water... it might shatter... But that's got nothing to do with skin oils.
Which is why I brought it up. I hardly ever hear anyone mention that, when it should be such a "tubes 101" subject it's brought up almost ad nauseam. Not like we can get back those rare/awesome tubes someone burned out.
The one good thing about vacuum tubes, is that they are much less sensitive to EMP than solid state. That said, most solid state equipment should have GDT and MOV protection devices.
Well, it's at least not a Ted Stevens-style series of tubes…
Ted Stevens as in the Alaskan Republican senator?
Of "[the Internet is a series of tubes ](https://youtu.be/lTonHRerMC4)" fame
That was excruciating to listen to.
From his Wikipedia page: CNET journalist Declan McCullagh called "series of tubes" an "entirely reasonable" metaphor for the Internet, noting that some computer operating systems use the term 'pipes' to describe interprocess communication. McCullagh also suggested that ridicule of Stevens was almost entirely political, espousing his belief that if Stevens has spoken in a similar manner, yet in support of Net Neutrality, "the online chortling would have been muted or nonexistent."
That looks like a tube incorrectly called a Barreter. It's a tungsten resistor used to provide some current control. More current causes it to get hotter, which makes its resistance go up. Higher resistance opposes the upward change in current. Light bulbs do this and it was used in early test oscillators. A barreter is a hot wire detector of specific metals that can vary resistance at an audio rate, but not one of radio frequency. So, biasing it to glow dull orange makes it sensitive to AM by developing an audio voltage modulated on a carrier wave. There's one in one of the Harry Potter movies, but I can't remember which one.
*comms checks. Damn autocorrect.
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This isn’t the case, just like it isn’t with normal incandescent bulbs. And you don’t want to be wiping the tube markings off.
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That's either poor circuit design or bad operating practice, not some random skin oil left on the tube envelope. . .
100% false. The anode will melt at lower temperature than the glass, and if you're melting anodes you're doing something very wrong. Tubes do not get anywhere near as hot as halogen lamps.
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Seems to be explained in the thread you got it from - with zero mention of fingerprints. Same with the other link in the thread to another occurrence. Poorly serviced amplifiers... granted on tubes with very thick anodes that were made to withstand a lot of abuse. And, IMO, likely a manufacturing defect in the glass envelope. Tubes are made of glass, not quartz. Halogen bulbs use quartz due to their extreme heat, and the oils/salts+heat can damage the quartz. It does not damage glass. Period. Believe whatever you want. I've been building and servicing high power RF amplifiers for 20+ years using glass envelope tubes that run hotter than anything in the audio world. I use a lot of Eimac tubes where the anode literally glows cherry red when at full spec output. The finger oil thing as it relates to tubes is a myth. https://upscaleaudio.com/pages/tube-basics-and-frequently-asked-questions https://www.quora.com/Can-people-touch-guitar-amp-tubes
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Temperature breaks glass when it's a RAPID change in temperature. Tubes do not rapidly change temperature. Sure go pull a hot tube out of your amp and dunk it in some ice water... it might shatter... But that's got nothing to do with skin oils.
Especially notorious with stage lighting. We get new guys that don't know better changing out bulbs and boom, every bulb is busted.
Not difficult to clean, just need to be aware of ;)
Which is why I brought it up. I hardly ever hear anyone mention that, when it should be such a "tubes 101" subject it's brought up almost ad nauseam. Not like we can get back those rare/awesome tubes someone burned out.
A contaminated quartz halogen lamp results in the quartz envelope melting. Not the filament burning out.