Blue Glow in Vacuum Tubes

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Postby iceman90a » Thu Aug 26, 2004 10:34 pm

WiredState tb2a3

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Postby iceman90a » Wed Sep 15, 2004 8:19 pm

Wiredstate 300b

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Postby KD » Wed Sep 15, 2004 8:48 pm

Uy, galeng naman. Pati 6SL7 may blue glow.
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Postby Killer Mike » Fri Oct 22, 2004 10:25 pm

KD wrote:Uy, galeng naman. Pati 6SL7 may blue glow.

magkasing taba ba sila ng 6550? :)
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Postby alizaso » Thu Aug 25, 2005 7:36 pm

My stock EL34 also glow bluish inside.
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blue glow....soooo pretty (hypnotized)

Postby pigdog » Sat Dec 03, 2005 10:30 am

i see it too (like having spotted the loch ness monster) ! i see a blue glow on my TJ gold mesh 300b, very mesmerizing.............
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Postby zetroce » Fri Mar 31, 2006 9:10 am

Blue Glow from the KT-88 of my Dynaco Mark III:

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8)
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Postby Jon Agner » Wed May 17, 2006 7:05 pm

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Blue glow from the EH 2a3
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Postby Octaver » Thu Feb 22, 2007 12:39 pm

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Postby Le_Stat » Fri Jun 22, 2007 8:04 am

Blue glow from my recently acquired SED C 6L6GC :

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Connected to my Cayin A70.

Have to get a better camera na talaga. :x
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Postby XXXyzledge » Tue Aug 26, 2008 4:39 pm

blue glows of my EH KT-88 tubes on my a55t...
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is this a bad blue glow sir arnoldc?
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Re: Blue Glow in Vacuum Tubes

Postby qguy » Wed Sep 10, 2008 10:43 am

From what I read..

Blue glow that seems to stick to the sides of the glass is ok.
blue glow or blue haze that fills the entire tube is bad
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Re: Blue Glow in Vacuum Tubes

Postby bokway » Fri May 14, 2010 4:49 pm

Hmn . . .I bought a lovely little T.M.S. SET for my desktop that runs 6N3s and EL84s. Strangely, when I first turned it on the valves all glowed orange at the top and vivid neon blue at the base, causing confusion and consternation for me and my audiophile friend. It sounded superb but the colours were surely wrong and seemed to indicate an imminent melt-down. My pal advised me to switch it off so we could replace all the valves and try again. I found a new set of 6N3s and my pal donated a set of EL84 Mullards (what a guy!) but they made no difference, so we turned it off and let it cool down before removing the base-plate for a closer look. After some fiddling, we discovered a small blue LED wired to each of the valve seats! My pal suggested that maybe the LEDs were used in place of bias adjusters but neither of us had ever seen such a fitting before. Anyway, no matter what valves I fit they all glow orange at the top and electric neon blue at the base. This is, of course, totally artificial, but visually it looks and sounds fantastic, especially when hooked up to my veteran set of Royd Conistons. Who would have thought you could get such amazing sound from only six or seven watts?

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Re: Blue Glow in Vacuum Tubes

Postby arnoldc » Fri May 14, 2010 8:40 pm

Matagal ng technique yang LED bias. Almost all my amps used it, even preamps. You can get even more amazing sound with 2, 1 or even half watt.
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Re: Blue Glow in Vacuum Tubes

Postby dante » Tue Jul 27, 2010 1:14 am

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:devil: :devil: :devil:
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Re: Blue Glow in Vacuum Tubes

Postby zetroce » Tue Jul 27, 2010 8:12 am

Ang mahal naman niyang blue glow mo, at nasa "ulo" lang! ;) :D :D :D
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Re: Blue Glow in Vacuum Tubes

Postby arnoldc » Tue Jul 27, 2010 8:18 am

For artificial "blue glow", piso lang katapat nyan ;)
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Re: Blue Glow in Vacuum Tubes

Postby jhd » Mon Aug 02, 2010 8:58 am

All four of my 6L6 (dared i30 stock) have it at the base
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Re: Blue Glow in Vacuum Tubes

Postby arnoldc » Mon Aug 02, 2010 10:50 am

That's the P1 solution :lol:
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Re: Blue Glow in Vacuum Tubes

Postby jhd » Mon Aug 02, 2010 12:32 pm

kaya pala constant and unchanging prof. :D anyways, nice to know na they won't explode anytime soon.
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