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2359glenn | studio - Page 369

post #5521 of 10672

BTW If anybody uses 310A tubes I just found a gold mine................

post #5522 of 10672
Thread Starter 

What's an example of amps that use the glass?

post #5523 of 10672
Quote:
Originally Posted by rosgr63 View Post
 
Quote:
Originally Posted by longbowbbs View Post
 

I have a Sylvania 5U4G that I really like.

Warning: Spoiler! (Click to show)

 

 

 

 

It was great in the Decware. I need to find a twin for it t use in the Cary.

 

Very nice Eric, Is that Svetlana or Sylvania???????????

 

It is a Sylvania. 

post #5524 of 10672
Quote:
Originally Posted by Silent One View Post
 

What's an example of amps that use the glass?

 

My Tektron uses them that's why I collect them.

 

Quote:
Originally Posted by longbowbbs View Post
 

 

It is a Sylvania. 

 

I thought you'd have a go at me for been naughty............again

post #5525 of 10672
Quote:
Originally Posted by rosgr63 View Post
 
Quote:
Originally Posted by Silent One View Post
 

What's an example of amps that use the glass?

 

My Tektron uses them that's why I collect them.

 

Quote:
Originally Posted by longbowbbs View Post
 

 

It is a Sylvania. 

 

I thought you'd have a go at me for been naughty............again

That would be like going after a fish for swimming....:evil:

post #5526 of 10672

That's funny Eric, I like it!

 

BTW fish or mermaid?

post #5527 of 10672
Quote:
Originally Posted by rosgr63 View Post
 

That's funny Eric, I like it!

 

BTW fish or mermaid?

I had no idea you wanted to be a mermaid....The things you learn about people!  :D

post #5528 of 10672
Quote:
Originally Posted by rosgr63 View Post

To be honest I can't understand the 596 hype.
They have the same plates as the 5U4GB and probably sound very close to them.

I do have a pair but never bothered with them.

Tyrell nice to know you are enjoying your Sylvania 45's now.
Which rectifier are you using?

Still the same pair. They weren't whining last night. I won't pull them until they get on my nerves again.

The tung Sol 45s go in tonight.
post #5529 of 10672
Glenn what do you use in your personal 300B amps for rectification? 6AX4?
post #5530 of 10672
Damper diodes 4 of them per amp
12AX4 / 12D4 really the same tube. Your amp still has 4 diodes but each 6BY5 has 2 diodes in it.
I could have used 6AX4 because my transformers have 12.6 center tap winding so I can use 6 volt or 12 volt.
I used the !2AX4 because it was the same tube but I can get them for $1.00 ea
post #5531 of 10672

Damn.  One of the Tung Sols has blue swirls showing on the top of the glass.  This means the tube is gassy and is unsafe right?

 

So out of 4 pairs of 45s only one is good and one is sort of good (one of the RCAs is weak) with the other two being bad.  This only increases my temptation to pull the trigger on the EMLs next year.

post #5532 of 10672

http://www.jacmusic.com/techcorner/ARTICLES/English-neu/blueglow/blueglow.htm

 

So according to Jac van der Walle's article here what I'm seeing is not gas but fluorescence and the tube should be fine and safe.  The blue glow is not coming from inside the anode plate/filament area but instead looks almost like faint blue stains on the glass bulb itself.

 

Glenn in your opinion is the tube okay to use?  If the tube were in fact gassy what is the risk of using it?

 

Thanks!

post #5533 of 10672
That blue glow is pretty common with 596.


PAS_4099.jpg
Edited by jc9394 - 10/19/13 at 7:42pm
post #5534 of 10672

I even have the very light blue glow on some of the Russia 6AS7 tubes. Nothing to be concern about.

post #5535 of 10672

Maybe I'll fire it back up again.  It's hard to tell what's what with these old tubes.

 

It's very pretty, just slight traces of dark blues swirls on the glass.  They are stationary for the record, not moving.  Only one tube is doing it.  The other one has a filament wire that appears to not be taut but it sounded normal when I ear tested before shutting it off.

 

Thanks.

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