[jc9394]

how many hours you have on the tubes? 
 
eml 5u4g needs around 80 hours
treasures needs around 200 hours
not sure on the GE 6080 but my GEC 6080 needs around 100 hours
 
if your tubes are new, give it times to burn in.

 

[MuppetFace]

 
Quote:

how many hours you have on the tubes? 
 
eml 5u4g needs around 80 hours
treasures needs around 200 hours
not sure on the GE 6080 but my GEC 6080 needs around 100 hours
 
if your tubes are new, give it times to burn in.

Thanks, this is exactly what I was looking for. I was thinking it was an issue of the tubes being too new.
 
I'm sure all the issues I mentioned will be gone by the end of the week.

 

[jc9394]

Try to get a hold of GEC 6080 or 6AS7G, they are THE power tubes for WA22.

 

[MuppetFace]

 
It's also possible some of the brightness I'm hearing could be from the 840C, which is a little on the bright side of neutral for some people.
 
Any suggestions for tubes that might counter a bright source?
 
 
 
Quote:

Try to get a hold of GEC 6080 or 6AS7G, they are THE power tubes for WA22.

Thanks, I'll keep an eye out.

 

[mikemalter]

Quote:

Just to clarify, right now I'm using: EML 5U4G, Treasure CV181-Z, and GE 6080. 
Source: Cambridge 840C in balanced configuration.
Headphones: LCD-2, Ed. 8, Ed. 9, K1000, DX1000, W1000x, HD650, K240 Sextett MP
 
The sound right now is nice in some ways, but less than pleasing in others. The soundstage is wide open and instrument placement is spot on. Midrange is liquid and enjoyable. The bass however is a bit woolly on bass heavy 'phones, and the top end is too shrill on just about everything except the Sextett.
 
It's only been running for 3 hours, so I'm guessing burn in will improve these qualities?

I am running with the EML and Treasures and we share HD650's.
 
The top end sounded shrill to me too when I used the upgraded Sylvania 7236's.  It's got better after I put back the RCA 6080's.  Not sure about how equivelant the GE and RCA 6080's are, but I am thinking they are similiar.
 
With regard to burn in, give your setup about a week to smooth out.  I've heard people say that it takes at least 50 hours to burn in the EML and the Treasures even longer.  However the basic sonic signature you are hearing is the foundation of the Woo sound.  Bass should tighten up a bit too.
 
Do you have balanced inputs?  What about your 'phones?  Do you have balanced connectors?  I'm using the Cardas cord with balanced connectors on my HD800's.
 

 

[MuppetFace]

 
Quote:

Do you have balanced inputs?  What about your 'phones?  Do you have balanced connectors?  I'm using the Cardas cord with balanced connectors on my HD800's.
 

Thanks for the info! Yeah, I'm going to definitely let the tubes cook for a week or so. My source is balanced, and a few headphones I'm using have balanced connectors (HD650, L3000, Ed. 8) which are from Moon Audio. Then there's the K1000. The rest of the headphones are single-ended, but the source is still balanced for what that's worth.

 

[mikemalter]

Quote:

 

Thanks for the info! Yeah, I'm going to definitely let the tubes cook for a week or so. My source is balanced, and a few headphones I'm using have balanced connectors (HD650, L3000, Ed. 8) which are from Moon Audio. Then there's the K1000. The rest of the headphones are single-ended, but the source is still balanced for what that's worth.

Haven't done any testing with single ended vs. balanced, but I have heard here and from Jack that having a balanced source will get the most from the amp.
 

 

[mikemalter]

Quote:

Try to get a hold of GEC 6080 or 6AS7G, they are THE power tubes for WA22.

Who is a good source?
 
Thanks.
 

 

[Skylab]

GE (note that is NOT the same as GEC) 6080's are bright and lack bass.  The 7236 will be better, but I agree what you really want is a 5998 if you want punch, or a GEC 6AS7G (not a 6080). The 5998 is becoming harder to get, but it's easier to get than the elusive GEC 6AS7G.
 

 

[jc9394]

Quote:

GE (note that is NOT the same as GEC) 6080's are bright and lack bass.  The 7236 will be better, but I agree what you really want is a 5998 if you want punch, or a GEC 6AS7G (not a 6080). The 5998 is becoming harder to get, but it's easier to get than the elusive GEC 6AS7G.
 

Ii have the GE6080 but I never tried.  The TS5998 gives you the most punch, it is very good with HD800 but not so much with DX1000 or D7000 plus it has too much gain that I can barely turn the volume pass 9 o'clock.  The GEC 6AS7G is getting really hard to track down and the price is getting close to TS BGRP.  The GEC6080, my second flavor which is around 85% of GEC6AS7G can have for a 1/3 of the price and much easier to a a hold of.

 

[MuppetFace]

 
Quote:

GE (note that is NOT the same as GEC) 6080's are bright and lack bass.  The 7236 will be better, but I agree what you really want is a 5998 if you want punch, or a GEC 6AS7G (not a 6080). The 5998 is becoming harder to get, but it's easier to get than the elusive GEC 6AS7G.
 

Thanks for the info, it really helps! Would 7236 Cetron NOS be a reasonable alternative?

 

[Skylab]

Quote:

 

Thanks for the info, it really helps! Would 7236 Cetron NOS be a reasonable alternative?

Potentially even better.  Cetron tubes were essential Tung-Sol, and many people (including me) prefer the Tung-Sol 7236 over the Sylvania. But you would want a pair - not advisable to mix and match brands.

 

[MuppetFace]

Quote:

Potentially even better.  Cetron tubes were essential Tung-Sol, and many people (including me) prefer the Tung-Sol 7236 over the Sylvania. But you would want a pair - not advisable to mix and match brands.

I found a pair of the Cetron 1983 NOS. Since they're the same as Tung-Sol more or less, I suppose I'll go ahead and place an order. Thanks for the advice again.
 
These GE tubes I'm using are bumming me out. 

 

[mikemalter]

Quote:

I found a pair of the Cetron 1983 NOS. Since they're the same as Tung-Sol more or less, I suppose I'll go ahead and place an order. Thanks for the advice again.
 
These GE tubes I'm using are bumming me out. 

When you get them, please post your impressions.  As I get a baseline with my EML for what to listen for, I'm going to want to look at power tubes.
 

 

[avsBuddy]

Does anyone know what version of Alps volume pots Woo uses in their amps?
 
I'm trying to decide whether it's worth upgrading to a stepped attenuator. I've heard that previous versions of the DACT attenuator had quite a bit of play in each "step". Is this still the case in the newer version that Woo uses or are the volume steps crisp in their feel?