[Skylab]

You can do much better than the Jan Phillips 6922. But you can spend a lot in the process.

Lots of good info about the 6922/6DJ8 here: Joe's Tube Lore

 

[pzm9pzm9]

Quote:

Originally Posted by Skylab /img/forum/go_quote.gif You can do much better than the Jan Phillips 6922. But you can spend a lot in the process. Lots of good info about the 6922/6DJ8 here: Joe's Tube Lore

Ha! The article! I remember reading it when I was so excited about tube rollin'

Anyway, I x2 agree 6992 can be replaced. The most expensive yet worth to upgrade.

 

[IceClass]

Quote:

Originally Posted by Skylab /img/forum/go_quote.gif I am generally partial to Sylvania black-plates.

Just ordered a pair of them off fleabay. Thanks for the rec.

Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif I really won't know what to do if my set of 5998 dies... It is so hard to find matched pair! Speaking of matched tubes, do we only need matched tubes for power tubes? I am trying to get a pair of EZ80, but I am not sure if they need to be matched. any help?

Forgive me if I'm wrong but I was distinctly under the impression that tubes don't need to be matched on the Woos.
Now I'm doubting myself.

Quote:

Originally Posted by Skylab /img/forum/go_quote.gif You can do much better than the Jan Phillips 6922. But you can spend a lot in the process.

On hand, I have 2 pair of the Jan Philips, a pair of the Electro Harmonix 6992EH, a pair of Sylvania JAR and lastly a pair of Westinghouse 6DJ8/ECC88. I'm assuming that 6922 and 6DJ8s are interchangeable.


I'm quite thoroughly confused with the 5099 tubes. I have a pair of Tung Sols which I gather is good news but I'm confused it the 5099 is a drop in replacement for any 6088 or 6AS7?
In other words, are the 6088,6AS7 and 5099 all interchangeable?

 

[IceClass]

Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif Ha! The article! I remember reading it when I was so excited about tube rollin' Anyway, I x2 agree 6992 can be replaced. The most expensive yet worth to upgrade.

As the owner of a WooToo, what tube compliment do you use?

 

[pzm9pzm9]

Quote:

Originally Posted by IceClass /img/forum/go_quote.gif As the owner of a WooToo, what tube compliment do you use?

Amperex PQ 6922 (63') bought it from e-bay. Someone tried to see where my limit was at the last minute... ended up paying ALOT

As far as tubes matching, I am 100% sure power tubes needs to be matched. I e-mailed Jack about power tube matching couple months ago, he said non-matched pair will not cause any harm to the amp, but will sound not right (I think he means unbalanced volume level.)

 

[librarian]

How does Sylvania 7236 OR Tung-Sol 7236 and RCA 6as7g compare?

 

[pzm9pzm9]

Quote:

Originally Posted by librarian /img/forum/go_quote.gif How does Sylvania 7236 OR Tung-Sol 7236 and RCA 6as7g compare?

I haven't tried RCA 6as7g for a long time. From my fuzzy memory, RCA was linear sounding.... better than the stock GE tubes but not up to the level of 7236s.
They are pretty cheap, but I would rather save those money and get 7236 or 5998.

 

[librarian]

Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif I haven't tried RCA 6as7g for a long time. From my fuzzy memory, RCA was linear sounding.... better than the stock GE tubes but not up to the level of 7236s. They are pretty cheap, but I would rather save those money and get 7236 or 5998.

I thought so. I couldn't find a matched pair of 5998 anywhere, so I just ordered Tung-Sol 7236 from Wooaudio. Thanks!

 

[Skylab]

Quote:

Originally Posted by IceClass /img/forum/go_quote.gif I'm quite thoroughly confused with the 5099 tubes. I have a pair of Tung Sols which I gather is good news but I'm confused it the 5099 is a drop in replacement for any 6088 or 6AS7? In other words, are the 6088,6AS7 and 5099 all interchangeable?

OK so with tubes, the EXACT numbers matter, and those are wrong.

The 6AS7G is the exact equivalent of only the 6080 (NOT 6088). Other than appearance, these tubes are the same.

The 5998 (*not* 5099), 7236, and 2399 are all similar to the 6AS7G, but they are not the same tube. Clearly, however, they will work in the WA2, since Woo sells them. And they will work in *most* 6AS7G amps, but it's not a guarantee.

The 6520 is sometimes a 6AS7G, and sometimes a 5998, just to make things more interesting.

 

[Seamaster]

to me GEC 6AS7G and 6080 are the only way to go.

 

[herroyuihk]

I found Rectifier is also very important.
Telefunken EZ80 has tight bass, but it is too exciting
On the contrary Mullard EZ80 square getter is too soft.
In WA2, We need to combine three type3 tube into a harmonious integrity, so rectifier may break this balance
Jack tell me Wa2 can also use EZ81(EZ80 is a little rare than EZ81....)
So I can go to find Goldlion U709=EZ81
It is also very rare tube

And....very expensive ........
If I found it is very good for Wa2, I will report ....

 

[pzm9pzm9]

Quote:

Originally Posted by herroyuihk /img/forum/go_quote.gif I found Rectifier is also very important. Telefunken EZ80 has tight bass, but it is too exciting On the contrary Mullard EZ80 square getter is too soft. In WA2, We need to combine three type3 tube into a harmonious integrity, so rectifier may break this balance Jack tell me Wa2 can also use EZ81(EZ80 is a little rare than EZ81....) So I can go to find Goldlion U709=EZ81 It is also very rare tube And....very expensive ........ If I found it is very good for Wa2, I will report ....

Did you buy them as a matched pair? NO ONE was able to give me an answer if they need to be matched

 

[pzm9pzm9]

Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif Did you buy them as a matched pair? NO ONE was able to give me an answer if they need to be matched

Okay. is my question too dumb to ask or what

Frankly, I have asked this same question like 3 times in the past and came up with no answer each times. I would wet my hands on EZ80 only if I know if they needs to be matched. So if there is anybody out there who knows the answer to my noobie question, please spare your little time to educate me.

 

[herroyuihk]

Quote:

Originally Posted by pzm9pzm9 /img/forum/go_quote.gif Okay. is my question too dumb to ask or what Frankly, I have asked this same question like 3 times in the past and came up with no answer each times. I would wet my hands on EZ80 only if I know if they needs to be matched. So if there is anybody out there who knows the answer to my noobie question, please spare your little time to educate me.

The main reason is tube sellers all say that Rectifier doesn't need to be matched...
But I think sometimes it shoud be matched.
I can feel strange when some rectifiers are not matched.
Moreover, some tube tester is not so accurate, like TV-7? or someseller's tube tester isn't cailbrated.
They say that these tubes are matched, and I also don't hear a very balance sound. So.....

 

[IceClass]

Quote:

Originally Posted by Skylab /img/forum/go_quote.gif OK so with tubes, the EXACT numbers matter, and those are wrong. The 6AS7G is the exact equivalent of only the 6080 (NOT 6088). Other than appearance, these tubes are the same. The 5998 (*not* 5099), 7236, and 2399 are all similar to the 6AS7G, but they are not the same tube. Clearly, however, they will work in the WA2, since Woo sells them. And they will work in *most* 6AS7G amps, but it's not a guarantee. The 6520 is sometimes a 6AS7G, and sometimes a 5998, just to make things more interesting.

Thanks for the explanations there SkyLab. I'd been cruising Ebay to look at tubes and my mind was a mess of numbers.

So, I'm assuming that the WA2 has always used the same Power tubes and only the rectifier tubes have been changed. Therefore, my WooToo should handle any of the 5998/7236/23996AS7G power tubes.
As for the 5998 tubes, what are the variants? I see them advertised as black gate, triple mica etc What do these terms refer to and are some better than others?