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post #316 of 329

The 5R4 is OK to use It can handle 250ma it does have a 69 volt drop at this current. The amp draws 220ma if using 6AS7s

The high voltage drop will change the sound for better or worse I don't know. It is according to the phones you are using.

Just don't use those boutique 5U4s Sophia or EML they will blow up I think they are mostly for looks.

post #317 of 329
Thread Starter 

EML 5U4G worked ok but i only tried it briefly (like 10-20 minutes), don't know about longer use. i probably wouldn't risk it knowing its a delicate flimsy little tube and the fact that i know the glenn otl runs some tubes really hot. 

 

the 274B eml didn't work at all, it sparked a bit actually and it looked like it ran really hot, didn't leave it in there for more than a few seconds. im sure sophia would have similar effect.

post #318 of 329

Good to know that 5u4 and 274 are bad for the otl.  I was eyeing some STC 274b not along ago and good thing I didn't get them.  

post #319 of 329
Thread Starter 
Quote:
Originally Posted by Neogeo333 View Post
 

Good to know that 5u4 and 274 are bad for the otl.  I was eyeing some STC 274b not along ago and good thing I didn't get them.  

 

5U4G worked well for me, but it does run them a little hot and i think glenn said it can't handle the current like some of the other rectifiers.

 

the only exception was EML 5U4G which isn't as robust as the older NOS tubes and will probably not live very long in the Glenn amp.

 

274B is definitely not compatible though.

post #320 of 329
Quote:
Originally Posted by Dubstep Girl View Post
 
Quote:
Originally Posted by Neogeo333 View Post
 

Good to know that 5u4 and 274 are bad for the otl.  I was eyeing some STC 274b not along ago and good thing I didn't get them.  

 

5U4G worked well for me, but it does run them a little hot and i think glenn said it can't handle the current like some of the other rectifiers.

 

the only exception was EML 5U4G which isn't as robust as the older NOS tubes and will probably not live very long in the Glenn amp.

 

274B is definitely not compatible though.


A real one would work but would be maxed out on current   WE274B = 225ma amp uses 220ma

much better off with a WE422A = 350ma

post #321 of 329

Found a cheap & reliable source for 5R4WGB (Potato Masher :bigsmile_face:)  if anyone's interested :

 

https://www.etsy.com/listing/183440406/chatham-5r4gy-potato-masher-vacuum-tube?ref=shop_home_active_21


Edited by punit - 6/22/14 at 4:59am
post #322 of 329
Quote:
Originally Posted by Neogeo333 View Post
 

I tried a couple of 5r4 with the grey plastic base and I like them the best for my otl amp.  Better than the gz34 or gz37.   Best of all its still cheap.


Thanks for the recommendation. For the price this is a no brainer, best value (dollar to performance ratio) amongst all rectifiers I have heard so far. Which are your fav Power & Driver combinations with the 5R4WGB ?


Edited by punit - 6/29/14 at 7:23am
post #323 of 329
Quote:
Originally Posted by punit View Post
 

Found a cheap & reliable source for 5R4WGB (Potato Masher :bigsmile_face:)  if anyone's interested :

 

https://www.etsy.com/listing/183440406/chatham-5r4gy-potato-masher-vacuum-tube?ref=shop_home_active_21

 

I bought one, figured how could you not for $12.

 

Out of all of them so far though, U52 is hands down my favorite.  Even ranking higher in my book than the 422A, I love the sound it brings to the table for almost anything I play.  I have yet to find anything I can't play through either one though and get great sound.

post #324 of 329

Wow, thats a incredible buy, however that thing is butt ugly.

post #325 of 329
Quote:
Originally Posted by shultzee View Post
 

Wow, thats a incredible buy, however that thing is butt ugly.

 

It adds character... ok... not really, it's completely fugly, but still worth the try.

post #326 of 329

So mine showed up the other day and I have tried a couple of combinations with it, best I could get was with the Ken Rad's and 7236 through the LCD's.  No matter what I tried though the music just sounded muddy and condensed.  Maybe it will open up more after some burn in but so far it sounds as bad as it looks.

 

Did anyone else pick one up?  Curious to hear if there are some tube combinations that make it, well, not bad.

post #327 of 329
Thread Starter 
Quote:
Originally Posted by bonesnv View Post
 

So mine showed up the other day and I have tried a couple of combinations with it, best I could get was with the Ken Rad's and 7236 through the LCD's.  No matter what I tried though the music just sounded muddy and condensed.  Maybe it will open up more after some burn in but so far it sounds as bad as it looks.

 

Did anyone else pick one up?  Curious to hear if there are some tube combinations that make it, well, not bad.

 

i doubt it lol, its just a different tube to try out for fun.

post #328 of 329
Quote:
Originally Posted by Dubstep Girl View Post
 

 

i doubt it lol, its just a different tube to try out for fun.

 

True enough, it is definitely...unique, lol.

post #329 of 329

In my experience the 5R4WGB  needs about 100 hrs of burn in to sound its best. I really like the Chatham 5R4WGB + GEC 6080 + Ken Rad VT231 6SN7GT combo with HD 800 on the WA22.


Edited by punit - 8/17/14 at 7:26am
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