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2359glenn | studio - Page 371

post #5551 of 10212

From what I was reading this seems to be more common with pentodes and beam tetrodes than it is with triodes.  Certain types of blue can mean gas and that the tube is no good, I guess if it is a cloudy blue coming from inside the plates.  Glenn told me one of the National Union tubes I sent him for testing the amp started to glow blue from gas so I thought maybe blue was bad period for 45 tubes.  Since what this Tung Sol seems to be doing is no big deal I'm just going to sit back and enjoy the light show.

post #5552 of 10212

Here's some info on tubes that have that blue glow:

http://www.thetubestore.com/Resources/Matching-and-other-tube-info/Blue-Glow

 

post #5553 of 10212
Thread Starter 
Quote:
Originally Posted by Xcalibur255 View Post
 

So I turned the amp back on. 

 

I really wish I knew how to take low light shots with a camera.  This is the coolest thing I've seen since the first time I ever saw a tube light up.  The blue is definitely on the inside of the glass itself, it's not coming from the filament or the plate.  Now that I've looked more closely it actually swirls and snakes around on the glass a bit.  It's also twice as bright as it was last time, the blue is almost as prominent as the filament glow with the lights in the room off.

 

They seem to sound normal.  Cool stuff.

 

Ooh... I wanna see! Got a DSLR?

:popcorn:

post #5554 of 10212
Thread Starter 
Quote:
Originally Posted by jc9394 View Post

That blue glow is pretty common with 596.


PAS_4099.jpg

 

The British are coming :confused: 

 

Very nice, jc9394! :wink:

post #5555 of 10212
Quote:
Originally Posted by Clayton SF View Post

Here's a picture of my PrimaLuna with a quad of 6550C Russian tubes and all of them have blue swirls. They seem to be okay since they've been like that for the past 3 years.

I finally made it to the new local hifi shop today. They had the same PrimaLuna loaded with KT88 s driving some Klipsch RF-7II. I was really impressed. I've seen the ads for the amp in Stereophile and always wanted to check it out. I'm going back with some of my own music next time.
post #5556 of 10212

It should be fine to use Tyrell.

Check this article:

 

http://tubesound.com/2008/09/30/brown-or-black-getter-flashing-does-not-mean-used/#more-333

 

Eric I thought I was following.................. 

post #5557 of 10212
post #5558 of 10212

ive never seen a blue glow on any of my 596 or any of my other tubes. only noticed it once with my GEC 6AS7G curved base.

post #5559 of 10212
Thread Starter 

None of my tubes either. Maybe I'll set up the Nikon for Time-lapse fotos...

post #5560 of 10212
The tubes I own that glow blue are:

596, JJ 300B, Sovtek 5U4g, 6550C

Some of them glow blue more than others.
post #5561 of 10212

i guess my 596 isn't mighty :(

post #5562 of 10212

I only saw it once on one of my tubes but I can't even remember which one.

post #5563 of 10212
Quote:
Originally Posted by rosgr63 View Post
 

Eric check this listing.............

 

 

http://www.ebay.com/itm/261310109787?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Looks like a picture of really young Vodka.....That must be an audio accessory...

post #5564 of 10212

.

Quote:
Originally Posted by Xcalibur255 View Post
 

From what I was reading this seems to be more common with pentodes and beam tetrodes than it is with triodes.  Certain types of blue can mean gas and that the tube is no good, I guess if it is a cloudy blue coming from inside the plates.  Glenn told me one of the National Union tubes I sent him for testing the amp started to glow blue from gas so I thought maybe blue was bad period for 45 tubes.  Since what this Tung Sol seems to be doing is no big deal I'm just going to sit back and enjoy the light show.


This is fine it is just electrons that are missing the plate and hitting the glass

IF the amp is cranked up it will dance with the music sort of neat enjoy it.

 

The bad stuff is a pinkish blue that is inside the plate and sometimes the whole inside

of the tube will glow like this. Usually the tube draws lots of current when this happens.

The tube I said was bad most of the inside lit up and the cathode current meter pinned.

post #5565 of 10212
Quote:
Originally Posted by longbowbbs View Post
 

Looks like a picture of really young Vodka.....That must be an audio accessory...

 

 

596 in disguise!!!!!!!!!!!!

 

I was helping out with your 596 hunt........

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