[HeadphoneAddict]

Quote:

Originally Posted by Stoney /img/forum/go_quote.gif Anyone have experience with the 5V4? I'm listening to an old Sylvania (dug from a large box of miscellaneous tubes I salved from Jet Propulsion Laboratory 20 years ago... some interesting items, but not many I recognize except 6SN7 from the high-end world, although I don't recall numbers well). Just gets better as it warms up! Compared with the Sovtek 5U4G which came with my otherwise stock WA6, the Sylvania 5V4 has a flatter treble, more extended on top, less rolled off, with a better balance bottom to top. Treble is more finely delineated and realistic. Both lower bass and upper treble sound less rolled off. Also, the midrange remains glorious but not quite as meaty, less bloated in the "power band", and a bit more transparent. I get a slight increase in separation of instruments, something the stock unit doesn't do as well, I'm sure, as the premium-caps version. The punch and addictive pleasure is still there, but less of the slight glossed-over quality of the Sovtek. (I imagine I'll upgrade caps at some point, myself or Jack). I was bummed not to find more usable tubes in my box, such as 6DE7, 6EW7, and the long list of tubes I've seen mentioned as rectifiers. If anyone knows of a good auction or supplier for tubes that help extend the bandwidth and bring in a bit more detail and imaging, please post a link! Same with do-it-yourself capacitor replacements. Hell, I can solder just fine! By the way, here is my checklist of tubes mentioned in these threads. What have I missed? Sovtek 5U4G came stock 5AR4/GZ34 (metal base recommended) GZ33 GZ37/CV378 5AS4 5R4/WGA/WGB 5R4/FA/GA/GB/GY/GYA/GYB 5R4R Mullard 5U4G/U52 5U4GA 5U4GB (Western Electric 422a) 5U4WG 5V4/5V4G/GZ32/CV593 CV5745 U52 U54 CV575 CV1377 VT-244 274B 6dE7 6EW7 slim bottle, or adapter For those new to the subject: woo6 owners: rectifier tube rolling options - philips metalbase or any other metal base 5ar4/gz34 are very dynamic Tube gurus, please impart your wisdom - 6de7 is a dissimiliar twin triode WA6 Tube Rolling - 6DE7 sound will depend upon when it was made Woo 6 with images of the 6EW7 - To quote Jack,... WA6 Tube Rolling - All the metal based tubes I seen on ebay are going at 160s + Woo Audio 2 - interesting 6DE7 versions woo6 owners: rectifier tube rolling options - Page 2 - input stage of the 6de7 only has a gain/ amplification factor of 17 Upgraded Woo Audio 6? - more on narrow diameter 6ew7 HOLY WOO: Impressions of WA6 retrofitted w/ full upgrades - Page 2 - 6DE7 vs 6EW7 I've been Wooed... - Page 2 - 6DE7 one prefers will be chosen from GE/ RCA / Raytheon / Tung Sol or Sylvania woo6 owners: rectifier tube rolling options - fairly complete list of rectifiers woo6 owners: rectifier tube rolling options - Page 5 - summary WooAudio6 for driving K701 - good choice? - tube summary I've been Wooed... - WA6 pix and another tube summary HOLY WOO: Impressions of WA6 retrofitted w/ full upgrades - Head-Fi: Covering Headphones, Earphones and Portable Audio WooAudio6 arrived - first impressions - Head-Fi: Covering Headphones, Earphones and Portable Audio woo6 owners: what tubes? - Head-Fi: Covering Headphones, Earphones and Portable Audio Woo 6 is HEEEEEERE!!!! v [PICS] - Head-Fi: Covering Headphones, Earphones and Portable Audio WooAudio WA6 mods - Head-Fi: Covering Headphones, Earphones and Portable Audio WooAudio6 Tube Amplifier Full Review - Part I - Page 2 - Head-Fi: Covering Headphones, Earphones and Portable Audio woo6 owners: rectifier tube rolling options - Head-Fi: Covering Headphones, Earphones and Portable Audio 5R4GY good and cheap Upgraded Woo Audio 6? - Head-Fi: Covering Headphones, Earphones and Portable Audio

Too bad those links are all broken after the great head-fi crash of 07. I might try to take the time to search for them all and post the new links. We'll see...

 

[takezo]

don't forget the gz30/5z4g, possibly the most neutral, transparent
and balanced rectifier of them all...the chinese version is grainy
though...

 

[DoubleEs]

Just wondering if anyone have any experience of Matsush ita's tubes, I understand they are Japanese but are they a good make/worth looking into? I don't recall anyone mentioning them in this thread...

 

[jamato8]

They used a very high vacuum and made great tubes.

 

[sonq]

Has anyone compared the stock tube to the optional Sophia Princess Mesh Plate 274B on their WA6 or WA6SE? Hope you can share what the extra $150 buys in terms of sound quality. Thanks.

 

[dvb-projekt]

Have someone tested the Emission Labs 274B or 5U4G ?

274 Datasheet. Emission Labs.

5U4G Datasheet. Emission Labs.

A comparsion to the Sophia Princess 274 Mash were interesting, too.

 

[roger711]

I am using a USAF 596.  Sounds great, but a very rare tube.
 

 

[GloryUprising]

Folks with WA6-SE and 596 tubes, do you find your fuses blowing very prematurely?
 
I am currently using 2amp fuses and they seem to blow when the 596 is plugged in, but not when the Princess Sophia or with my 5R4GY.  I'm wondering if maybe I should be using a 3 amp fuse (the Woo Audio manual says 2 or 3 amps are both usable).  If anyone with a 596 can pull out their fuse to check what amp rating yours is would be appreciated.
 
The fuse blows within 5 second of power up when using the 596 and it seems like my 596 top pins are darker then I remember them being so I'm wondering if i got a bad tube.... 
 
what do you guys think?  
 
I sent Jack an email I hope he gets back to me.

 

[GloryUprising]

Quote:

Folks with WA6-SE and 596 tubes, do you find your fuses blowing very prematurely?
 
I am currently using 2amp fuses and they seem to blow when the 596 is plugged in, but not when the Princess Sophia or with my 5R4GY.  I'm wondering if maybe I should be using a 3 amp fuse (the Woo Audio manual says 2 or 3 amps are both usable).  If anyone with a 596 can pull out their fuse to check what amp rating yours is would be appreciated.
 
The fuse blows within 5 second of power up when using the 596 and it seems like my 596 top pins are darker then I remember them being so I'm wondering if i got a bad tube.... 
 
what do you guys think?  
 
I sent Jack an email I hope he gets back to me.

 
SOOO I got a replacement tube and it's been working GREAT so far.
 
Communication and shipping was a bit slower then I would have liked, but I'm sure Jack's super busy so it's understandable.  In the end, though, everything worked out ok.

 

[3083joe]

I know I'm resurrecting an old thread but Im really looking for a few tubes for my Wa6
if you can help that would be greatly appreciated
 
USAF 596
Emission Labs 274B
 
Thanks
Joe

 

[3083joe]

don't forget the gz30/5z4g, possibly the most neutral, transparent
and balanced rectifier of them all...the chinese version is grainy

though...

Love to hear which is the best for jazz mainly female vocals?
Looking at the z32 or z37