[rosgr63]

Nice informative post.
It sums up what I understand happens with rectifiers.
 
Rectifiers can have a marked impact on sound in some amps and very little in others depending on the design.
The same happens with driver and output tubes in my experience.
Some amps respond more to tube rolling than others.
 
Keeping things simple is the way I like too.

 

[ardilla]

Anyone - Is this CV575 of mine is the same as the u52? Looks pretty identical - but it doesnt have the two wholes in the top plate as some other U52's have. It also sounds verygood - but nice to know for shure
 

 

 

 
Inscription looks like this CV575-KB/Z  (not my pic)

 

 

[Dubstep Girl]

yeah its a U52 looks identical to mine.
 
I have 2 U52/5U4G.
 
one is black base, pan getter, and has the 2 holes in the top mica.
 
other is the brown base, no holes on top mica, d getter.
 
other than the holes in the mica, they are identically shaped. the getters change but the entire contruction of the tube is the same, the plates are identical and everything. 5 pins on bottom, etc.
 
not sure on the getter on yours i cant see in the pic, but the plates and everything else on yours looks 100% identical to either of my U52, so the CV575 is definitely the same tube.

 

[Dubstep Girl]

I hope to some day add the we274b to this list

 

[punit]

I am currently running my WA6 with an all Sophia set up, what kind of changes can I expect if I change the rectifier to a Mullard GZ32/CV593 or should I just stay with the Sophia?
 
Thanks for any info.

 

[Dubstep Girl]

Tighter sweeter more balanced sound. Better overall vs. sophia. Sophia will be smoother with fatter bass though. (Bass is more bloaty and one note on sophia unfortunately)

 

[punit]

Are the tubes in the link below the same as the Mullard GZ32 / CV593 / 5V4 listed in your comparision, the photos look a little different to the CV593 ?
 
http://www.ebay.com/itm/Two-2-Mullard-5V4G-equivalent-to-52KU-CV729-GZ32-5AQ4-/181305927817?_trksid=p2047675.l2557&autorefresh=true&ssPageName=STRK%3AMEBIDX%3AIT&nma=true&si=VBMR35vAV5XSxygcsd0C6PHXXSg%253D&orig_cvip=true&rt=nc
 
I just bought them as they are listed as Mullard GZ32 & then realised that these are 5V4G & not 5V4. will these sound the same ?

 

[Dubstep Girl]

Similar but i dont think its the same that one says 175ma output, mine is only up to 125ma. Theres also another gz32 type out there that looks different and has different specs as well..

 

[Dubstep Girl]

http://www.ebay.com/itm/MULLARD-GZ32-CV593-TUBES-NOS-/360172677862

 

[punit]

Similar but i dont think its the same that one says 175ma output, mine is only up to 125ma. Theres also another gz32 type out there that looks different and has different specs as well..

 
ya , i saw those but these were nearly half that price & I didn't realise the diff until after I bought , So i guess they should have the same sound signature , more or less ?
 
Edit:
What does the 175ma output vs 125ma translate to ? Does it mean 175ma will have more gain ?
 
Thanks.

 

[catspaw]

Awsome Work. 
 
2 Bad i Aint got the cash for a decent tube amp.... Many those babies look really nice.

 

[Dubstep Girl]

ya , i saw those but these were nearly half that price & I didn't realise the diff until after I bought , So i guess they should have the same sound signature , more or less ?

Edit:
What does the 175ma output vs 125ma translate to ? Does it mean 175ma will have more gain ?

Thanks.

Just their max output for current, not necessarily gain but yeah, you need enough current for the other tubes to put out power. So depending on the amp, you might not have enough,

 

[finaltheorem]

I was watching an eBay auction today for a type 596 rectifier and was somewhat surprised to see it sell $310.  This is the first 596 I've seen listed on ebay since I began searching a month ago, and I'm curious to know if that is the standard price for NOS 596s presently.  Could anyone who's been keeping an eye on these longer than I have provide some insight?

 

[dminches]

I think that is the most it has gone for.  It is hardly worth it unless this is a tube you desperately need.

 

[Dubstep Girl]

  I think that is the most it has gone for.  It is hardly worth it unless this is a tube you desperately need.

 
+1
 
200 is about the going price now and 250 would probably be as high as anyone should go. whoever paid 310 for it got ripped off, i would be sad to see it be a head-fier too.
 
$320 can get you a Cossor GZ37 or a U52, and they are far superior to the 596. Also $320 is about what a metal GZ34 would go for (from cheaper sellers or for used tubes). and the gz34 is what i would consider the "upgrade" from the 596.