#1
In my tube amp I noticed the 4 power tubes are turning blue, Now this is my first tube amp so I am not exactly sure what this means, but it doesn't seem good. Can anyone tell me what this means? Also I was looking at new tubes and i noticed ratings of easy, medium, and hard, what do these ratings mean? Any help is appreciated.
My Gear:
Schecter C1 Hellraiser FR
B-52 AT-100 Half stack
Boss GT-10
Breedlove AD25SR Plus
Yamaha EG112C
Boss Mt-2 Metal Zone
Ibanez Wd-7 wah
Dunlop Gator Grip 2.0, 1.5, 1.14
#2
usually tubes aren't supposed to turn blue, and if they do, it's a sign they're dying. if they're supposed to turn blue, then you have quite the uncommon make of tube.

anyway, other than looks, how's it sound? your sound fading in and out?

never heard of ratings for tubes.. check out the tube sticky at the top of the page.
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Keeley Modded BD-2
Vox V847a
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#3
ouch. good thing i stick with solid state.
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#4
Doesnt that have something to do with Oxygen mixing with something in the tube?I dont think thats good either.....
#5
the sound is fine no microphonics or anything like that. should I just get new tubes.??
My Gear:
Schecter C1 Hellraiser FR
B-52 AT-100 Half stack
Boss GT-10
Breedlove AD25SR Plus
Yamaha EG112C
Boss Mt-2 Metal Zone
Ibanez Wd-7 wah
Dunlop Gator Grip 2.0, 1.5, 1.14
#6
edit: i'd get a new set of tubes anyway, since, like a lightbulb, they're able to give out at any time.

Quote by CLIFF_BURTON
ouch. good thing i stick with solid state.

uhh, maybe?

if the amp is self-biasing, all you have to do is pop out the old tubes and stick new ones in. easier than changing a lightbulb that you have to twist and screw in.

the cost for 4 power tubes would probably be ~$50, totally worth it IMO.
Gibson SG Standard + 18volt EMG-81 & 85
Mesa/Boogie Mark IV + Recto 2x12
Keeley Modded BD-2
Vox V847a
Quote by one vision
Bureaucrats gonna crat.

Recognised by the Official EG/GG&A Who To Listen To List 2008
#7
What tubes should I get, there are so many to choose from. I'm thinking about getting sovteks cuz thats what I have in there, but my friend recommends jj's and groove tubes. What do you guys think?
My Gear:
Schecter C1 Hellraiser FR
B-52 AT-100 Half stack
Boss GT-10
Breedlove AD25SR Plus
Yamaha EG112C
Boss Mt-2 Metal Zone
Ibanez Wd-7 wah
Dunlop Gator Grip 2.0, 1.5, 1.14
#8
usually the stock svoteks they put in amps are really crappy.

jj tubes are generally darker gain and usually very good tubes. seriously check out the tube thread at the top of the page.
Gibson SG Standard + 18volt EMG-81 & 85
Mesa/Boogie Mark IV + Recto 2x12
Keeley Modded BD-2
Vox V847a
Quote by one vision
Bureaucrats gonna crat.

Recognised by the Official EG/GG&A Who To Listen To List 2008
#9
Also, it's not an insane tube question. You could've asked in the tube thread.

What kind of sound do you want? I don't like sovteks, they're kinda dull sounding.
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#10
are the preamp tubes glowing blue too?


and what amp is it?
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#11
I play everything from crystal cleans to extremely high gain metal. and no only the power tubes are blue the preamp tubes are still orange. and the amp is in my sig..
My Gear:
Schecter C1 Hellraiser FR
B-52 AT-100 Half stack
Boss GT-10
Breedlove AD25SR Plus
Yamaha EG112C
Boss Mt-2 Metal Zone
Ibanez Wd-7 wah
Dunlop Gator Grip 2.0, 1.5, 1.14
#12


Whoever said blue glow is a sign of a tube going bad is wrong, its called florescense and its completely normal, ive never seen tubes glow as blue as the ones in that picture but mine always have a blue glow around the glass near the plate.
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#13
...power tubes glow purple/blue when they're on...it's completely normal...
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#14
I WANT TUBES THAT GLOW BLUE!!!


seriously. orange is getting kinda boring. and its kinda bland on dark stages too.
Call me "Shot".

ShotRod Guitar Works

Custom Hand-wired Amplifiers and Effect Pedals.

Est. 2007


Source to everything I say about Guitars, Pedals, and Amplifiers: I make them.


UG's Best DIY PedalBoard
#15
Quote by ECistheBest
I WANT TUBES THAT GLOW BLUE!!!


seriously. orange is getting kinda boring. and its kinda bland on dark stages too.


I just put a blacklight behind my amp during shows. Green LED's inside the amp would be sweet too.
Major of 7 String Legion 7 > 6

Carvin DC747
Ibanez RG2228
Schecter Avenger Custom Shop
and my baby....
Gibson Explorer Studio
#16
If the sound is fine. There shouldn't be a problem. Like Jon said, they can give at any time, so getting new ones might be a good idea. But otherwise, your amp won't blow up or anything.

Off-topic, I think tubes that glow rainbow would be cool. Then I could tell my friends who come over to taste the rainbow.
Ben
#17
i have a B-52 AT-100, and i looked at the tubes and they're blue, but one of them is not.
is that a problem???????????
#18
I have read that if they glow blue its because they didn't get all of the oxygen out of the tube when they made it, is it a problem, usually not from what I have experienced personally. I used to have a Fender Deluxe Reverb and some of the tubes would glow blue, I have a Peavey Classic VT and one tube has a faint blue glow but the other doesn't, and I just got a Bugera 333xl and one of them glow. All worked just fine so I wouldn't worry much about it unless you notice a change in sound quality.
#19
Quote by CLIFF_BURTON
ouch. good thing i stick with solid state.

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#20
yeah, i wouldn't worry too much, i had a pair of powertubes glow blue once. it looks sweet! but as others have stated, having an extra set around is never a bad thing
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#22
The blue glow is actually the electrons reacting with cobalt that is found in many tubes, its has nothing to do with the tube dieing or oxygen being in the tube. If any oxygen is present in a tube the tube will not last, also the silver stuff in the top of the tube will turn white, it is actually put in the tube to oxides, it makes sure all the oxygen is out of the tube.
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#23
Quote by Johnbryant
The blue glow is actually the electrons reacting with cobalt that is found in many tubes, its has nothing to do with the tube dieing or oxygen being in the tube. If any oxygen is present in a tube the tube will not last, also the silver stuff in the top of the tube will turn white, it is actually put in the tube to oxides, it makes sure all the oxygen is out of the tube.


I stand corrected, and learned something new. Thanks
#24
Quote by Johnbryant
The blue glow is actually the electrons reacting with cobalt that is found in many tubes, its has nothing to do with the tube dieing or oxygen being in the tube. If any oxygen is present in a tube the tube will not last, also the silver stuff in the top of the tube will turn white, it is actually put in the tube to oxides, it makes sure all the oxygen is out of the tube.

took the words out of my mouth...
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#25
Completely normal. My last two quads of EL34's have glowed blue, and still do.

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#26
Quote by guitarmenace12
What tubes should I get, there are so many to choose from. I'm thinking about getting sovteks cuz thats what I have in there, but my friend recommends jj's and groove tubes. What do you guys think?

dont get Groove tubes, they're just re-branded Sovteks.
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#27
Quote by UnsignedRecords
usually tubes aren't supposed to turn blue, and if they do, it's a sign they're dying. if they're supposed to turn blue, then you have quite the uncommon make of tube.

anyway, other than looks, how's it sound? your sound fading in and out?

never heard of ratings for tubes.. check out the tube sticky at the top of the page.



No its not a sign that they're dying out.

If they're turning red, then its a sign they're dying out.
#28
Quote by al112987
No its not a sign that they're dying out.

If they're turning red, then its a sign they're dying out.

yeah, i didn't know that a year ago
Gibson SG Standard + 18volt EMG-81 & 85
Mesa/Boogie Mark IV + Recto 2x12
Keeley Modded BD-2
Vox V847a
Quote by one vision
Bureaucrats gonna crat.

Recognised by the Official EG/GG&A Who To Listen To List 2008
#29
Quote by Lorenzo619
i have a B-52 AT-100, and i looked at the tubes and they're blue, but one of them is not.
is that a problem???????????



Nice job bumping a year old thread

I won't criticize your overuse of question marks because you're from my hometown.
#30
Quote by Lorenzo619
i have a B-52 AT-100, and i looked at the tubes and they're blue, but one of them is not.
is that a problem???????????

ive been going around here with the same question - and this is my bumb to try to find the answer. whichever tube is on the far right side (even when I swap them around) does not have a blue glow, while the three on the left of it do. plsplsplsplsplsplsplspls
#31
Quote by CLIFF_BURTON
ouch. good thing i stick with solid state.


Yep good on ya. Playin it safe.
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