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post #106 of 322

Yeah and unfortunately the old axiom is true. They dont make em like they used to. Somebody should learn to. The niche market isnt so niche any more....

post #107 of 322

Here's another question: How does the amount of warmth provided from a tube DAC compare with a tube amp? I know there are different DACs and amps that vary in the amount of warmth, but what's the general answer to this?

post #108 of 322

Woo should hire you as their executive tube consultant!

post #109 of 322
Much thanks DG for all the input and hard work.
post #110 of 322
Quote:
Originally Posted by Marks World View Post

Much thanks DG for all the input and hard work.

and now she's selling all her tubes.,...........:eek: 

 

Or is she? ;)

post #111 of 322

Thanks for the excellent and informative thread!

 

Judging from DG's review and everyone's comments it appears the U52 CV575 is a better match for the WA5 + HD800 than the WE 422A. The WE is fetching outrageous prices on eBay recently. Since I am able to buy a pair of GEC U52 CV575 used for less than $250 I guess this is pretty much a no-brainer! 

post #112 of 322
Thread Starter 
Quote:
Originally Posted by lojay View Post
 

Thanks for the excellent and informative thread!

 

Judging from DG's review and everyone's comments it appears the U52 CV575 is a better match for the WA5 + HD800 than the WE 422A. The WE is fetching outrageous prices on eBay recently. Since I am able to buy a pair of GEC U52 CV575 used for less than $250 I guess this is pretty much a no-brainer! 

 

i found that i enjoy the WE422A as much as the GEC with the HD 800, if you have other GEC tubes in your amp, maybe the U52 will be better. the 422A i think is superior still, but the GEC is slightly more euphonic, the 422A more clear and defined at times. 

 

btw how can u find a pair for less than 250?!

 

Quote:
Originally Posted by magiccabbage View Post
 

and now she's selling all her tubes.,...........:eek: 

 

Or is she? ;)

 

i think i will , if i do, there will be some very nice tubes up for sale, rectifiers and also 6as7g types. i kinda don't want to though and will try and keep them if possible. although i do need a new car.

post #113 of 322

These tubes usually go for about $600 a pair used where I live, but I guess the condition of this pair might not be that great. Seller says they're tested above NOS acceptable levels, which I take with a grain of salt. Will test for noise, shorts and gas personally before I buy. I do not think there are any other GEC U52 CV575s so I hope I'm buying the same thing you've reviewed. I'm willing to take the risk at this price :biggrin:

post #114 of 322

Hi Dub Step Girl,

 

Thank you very much for posting you experiences with the different tubes.  I have been wanting to upgrade the rectifier on my Stratus for some time now, and the info you provided was perfect for helping me make the decision!

 

I currently have an RCA blackbase but have just ordered a GEC on your reccomendation.

 

Thanks again,

 

cheers,

 

gav

post #115 of 322
Thread Starter 
Quote:
Originally Posted by gavtorn View Post
 

Hi Dub Step Girl,

 

Thank you very much for posting you experiences with the different tubes.  I have been wanting to upgrade the rectifier on my Stratus for some time now, and the info you provided was perfect for helping me make the decision!

 

I currently have an RCA blackbase but have just ordered a GEC on your reccomendation.

 

Thanks again,

 

cheers,

 

gav

 

 

you're welcome!!

 

please let me know what you think of the GEC, i hope i can buy a stratus one day and would love to use the GEC or WE422A over the EML alot of people seem to use.

post #116 of 322
Quote:
Originally Posted by Dubstep Girl View Post
 

 

 

you're welcome!!

 

please let me know what you think of the GEC, i hope i can buy a stratus one day and would love to use the GEC or WE422A over the EML alot of people seem to use.

might ask about that in the DNA thread

post #117 of 322
Thread Starter 
Quote:
Originally Posted by magiccabbage View Post
 

might ask about that in the DNA thread

 

nope, out of the few stratus owners, as far as i know, none have tried them. and most seem to have only tried the easily available 5U4 types and the EML (probably to match the EML 2a3).

 

btw, i tried a Tung Sol 5U4G the other day, i might add it to this review this weekend but it sounded ok, i don't think anything amazing though. the best regular 5U4G so far appears to be that 1940s RCA smooth black plate, nice warm sound with clean focused bass and doesnt really do anything wrong.

 

would be nice to see if RK60 works with the Stratus.

post #118 of 322

Thanks Dubstep Girl for a well written rectifier comparison.  Should become a great reference thread here. Great job!

 

I would also like to add a often over-looked rectifier, a Brimar ( STC ) 5V4G/CV729/GZ32.  I have the CV version from 1955 and it is a pretty decent rectifier in the right applications. I have it in a stock 2012 Woo Audio WA6. combined with RCA 6FD7 "fat bottles", and 6SN7 ( using WA's adapters),  Ken-Rad 6SN7GT- VT231 and RCA 6SN7GT-VT231 grey glass tubes. I also have used a Amperex GZ34 ( 1957 ) and a Tung-Sol 5U4G from 1952.

 

The Brimar 5V4G/CV729 has tight bass, goes pretty deep, just ever so slightly on the warm side of neutral on the mids, and some warmth ( slight roll-off? ) on the highs. Has a wide, horizontal soundstage, and nice space and definition. It betters the Tung-Sol in all areas except the clarity of the highs, and just about matches the deep end in punch and depth of the Amperex GZ34. Soundstage is better than both of the others by a wide margin. If you need a rectifier with a controlled but deep bass , and a "soft" top end, it's a very nice rectifier. The older 50's version has a square getter not unlike the early Brimar 5R4GY. That seems to matter to some.  

 

Also, for what it's worth, the guide in the Woo Audio site and manual for the WA6 incorrectly refers to the 5V4G as directly heated. It is a indirectly heated type, ( slow ramp-up ).

post #119 of 322

The more common bottom getter Tung Sol 5U4G is indeed a so-so rectifier.

 

The better (and costlier) version of the TS 5U4G is the top getter. I have one but can't say I have done a head to head with the 596, EML, or metal base GZ34.

post #120 of 322

I personally never like the YTS rectifier 5U4G. I thought both the Sylvania and RXCVA 5U4G were both much better . I have plenty of both of those in the house.   I do like th e596 tubes and fortunately I found another pair en-route from England

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