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Eddie Current Zana Deux owners - Page 95

post #1411 of 1745
Quote:
Originally Posted by songmic View Post

 

I believe so too. NOS tubes from 5-60's are generally superior in sound quality to tubes made nowadays, but they are even more expensive also because they're quite rare and limited in supply. But I have a good feeling the fuse replacement will also yield pleasantly surprising results for its measly price.

 

From your Headfonia article, I can see that you have a lot of experience in tube rolling. Are there some 6SL7 family of tubes (along with replaceable ones) that you'd recommend?


It's important to be careful about generalizing too much regarding old tubes.

There are fantastic old tubes (thus legendary status), equaly good (as new productions) and pretty poor ones.

 

I haven't had time to roll any 6SL7's thus only what I've read. Don't like giving tips that I haven't heard myself.

But... what I've been told from individuals whom ears I trust.... Tung Sol 6SL7 = Pretty neutral; Brimar CV1985 = warmer, can be a good start. Although that 300$ NOS one you bought most likely can't compete with these 40-50$-tubes.

 

Will update with my own findings when I start rolling.

post #1412 of 1745

I've found the Sophia Electric 6SL7 tubes to sound very good, even better than a lot of the NOS tubes. They have more treble extension, and a bit more bass, than the Adzam and Brimar tubes I've used. The GE 5691 tube is almost as good as the Sophia.

post #1413 of 1745

I agree with 333Jeffery, the Sophia Electric is an excellent tube and match, listening to it now. Over the years, however, I've rolled quite a few different tubes and, in general, have an affinity for the NOS Sylvania's, 6SL7 Bad Boys, 6SL7 GT and GTY and also the 6SL7WGT; the military versions are all good. However, there's one that stands out amongst the crowd, the military Tung Sol black glass with the oval plates; these have a rich, detailed and fluid sound (am told they're great with the HD800's).

 

Just a suggestion, if you're spending $300 on a NOS tube, you should have the option of returning it, if you're not satisfied with it.

 

Good luck and again, keep us posted!

 

thanks,

 

John

post #1414 of 1745
Quote:
Originally Posted by tme110 View Post

Does the Zana power supply always hum? I don't know if mine just started or now that I noticed I can't stop hearing it.  Come something be done - like tightening the transformer screws or something.  It's interesting that if you turn the zana off at the amp, the hum in the p/s goes away.  This may seem like it makes sense but normally transformers hum whether they're under load or not.
 

 



Ok looks like it was a tube slightly out of wack so I had to find another set of much tubes.  Picked this set up specifically because I thought having a tube stamped CCCP would be cool.

 

700

post #1415 of 1745

^You can use EY500 tubes in the Zana Deux, as well.

post #1416 of 1745

The Mullard ECC35 is one of the most euphonic tubes I've used on any amp. It's been widely discussed and just about unanimously appreciated for several years now. It's my standard tube and I haven't felt any need to tube roll my Zana over the last 6 months. 

post #1417 of 1745
Quote:
Originally Posted by ericfarrell85 View Post

The Mullard ECC35 is one of the most euphonic tubes I've used on any amp. It's been widely discussed and just about unanimously appreciated for several years now. It's my standard tube and I haven't felt any need to tube roll my Zana over the last 6 months. 

 

I hope it makes a significant improvement over the stock Tung-Sol 6SL7. smily_headphones1.gif

 

Quote:
Originally Posted by 333jeffery View Post

^You can use EY500 tubes in the Zana Deux, as well.

 

I've been looking for some decent, vintage EY500, but to no avail. I would love to buy a pair of Telefunken EY500, but no matter how hard I look on the Internet I can't find them. All I found were Tungsram or Russian-made tubes of lower quality. If you know a good source, would you kindly share with me?

post #1418 of 1745

^I've tried Raytheon and Sylvania EY500 tubes that I found on Ebay. They work fine, but made no noticeable difference in the sound over the stock Svetlana tubes.

post #1419 of 1745
Quote

I've been looking for some decent, vintage EY500, but to no avail. I would love to buy a pair of Telefunken EY500, but no matter how hard I look on the Internet I can't find them. All I found were Tungsram or Russian-made tubes of lower quality. If you know a good source, would you kindly share with me?

 

There are these http://www.ebay.co.uk/itm/1x-EY500A-EY500-VALVO-Tube-Rohre-Lampe-TSF-Valvola-NOS-/250744531367?pt=Vintage_Electronics_R2&hash=item3a6189e9a7 .  I have a few somewhere with a bunch of Siemens (haven't tried either of them), but didn't pay anything like that price.  I have tried some Philips 6EC4As / EY500s, or Sylvania maybe, but like 333jeffrey I didn't really notice much of an impact. 

 

Agree, too, that the ECC35 is a lovely, euphonic tube, but prefer it with 6C18Cs in the big seat.  With 6C33Cs, I like to use either a black glass tung sol or a red base RCA - the latter are, or at least used to be a popular tube roll as well.  Ultimately, though, like most other things, YMMV, and probably will.  After a while, I got sick of switching out tubes, and only make a change for change's sake about every 6 months or so.  The rest of the time I'm just enjoying the music...

post #1420 of 1745

Hi, a bit off topic, but I'm wondering if any Zana Deux owners have tried the Herbie tube dampers (or any other type)? Also, I'm wondering if it's worth getting these for all the tubes, or just the driver tube?

 

thanks,

 

John


Edited by Dr.J - 1/21/13 at 7:47am
post #1421 of 1745
Quote:
Originally Posted by Dr.J View Post

Hi, a bit off topic, but I'm wondering if any Zana Deux owners have tried the Herbie tube dampers (or any other type)? Also, I'm wondering if it's worth getting these for all the tubes, or just the driver tube?

 

thanks,

 

John

 

Theoretically, while the 6SL7 driver tube has the greatest impact on the overall sound quality, it is in fact the 6D22S rectifier tubes in which dampening becomes most important. Any uncontrolled hum or microphonics that occur in rectifier tubes can adversely affect the performance of other tubes. So those are your priority.

 

But then again, theoretically, it would be best to simply dampen all tubes. Those Herbie tube dampers aren't that expensive, after all. Just remember to use the HAL-O III dampers for the 6C33C power tubes, which are quite hot.

 

Of course, everything I've said above is only in theory and I can't say whether using these tube dampers will really make a noticeable improvement for the ZD.


Edited by songmic - 1/21/13 at 5:00pm
post #1422 of 1745
Quote:
Originally Posted by Dr.J View Post

Hi, a bit off topic, but I'm wondering if any Zana Deux owners have tried the Herbie tube dampers (or any other type)? Also, I'm wondering if it's worth getting these for all the tubes, or just the driver tube?

 

thanks,

 

John

 

I've used the Herbies dampers on both the driver and power tubes - separately and together (but not the rectifiers), and did not like the results at all.  From what I can tell, the use of tube dampers / coolers generally seems if not a polarizing topic, then at least very much a matter of personal experience and taste.  For me, the Herbies dampers basically throttled the dynamics; sucked the life out of the music, and dulled everything down.  As with driver tube choice, for eg, YMMV, if you do decide to give them a go.  You might like to ask yourself, though, what 'problem' you are looking to address.  I didn't think to hard on that, and feel I wasted money as a consequence...

post #1423 of 1745

Oh, geez, I wish I would have seen this an hour ago, as I just ordered a set!

post #1424 of 1745
Quote:
Originally Posted by 40Hz View Post

I've used the Herbies dampers on both the driver and power tubes - separately and together (but not the rectifiers), and did not like the results at all.  From what I can tell, the use of tube dampers / coolers generally seems if not a polarizing topic, then at least very much a matter of personal experience and taste.  For me, the Herbies dampers basically throttled the dynamics; sucked the life out of the music, and dulled everything down.  As with driver tube choice, for eg, YMMV, if you do decide to give them a go.  You might like to ask yourself, though, what 'problem' you are looking to address.  I didn't think to hard on that, and feel I wasted money as a consequence...
A bit of research convinced me that unless the tubes are exposed to mechanical vibration from outside, the glass flexing was part of the charm of a tube. This is another of those contentious topics like burn in.
post #1425 of 1745

That's pretty much where I got to as well, although (contrary to my normal approach) I did my research after ordering them...  Oh well, we live and learn.

 

And Dr J, you never know, you might love them - or at least not be disappointed - good luck.
 

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