[joseph69]

   
i think he was mentioning the RCA 5U4GB.

Yeah, your right, wishful thinking must have took over!!!

 

[magiccabbage]

Wow, i just breezed through it there. Great write up! Thanks for taking the time. 
 
Now i will go back and read through it thoroughly. 

 

[Arcamera]

 

[bigfatpaulie]

DSG - You rock. OMG, you rock.

Thank you

 

[magiccabbage]

DSG - You rock. OMG, you rock.

Thank you

hahaha. Keep your pants on. 

 

[SleepyOne]

DSG - Awesome thread!!
 
A question about your Mullard GZ34/ 5AR4, is it single or double 'O' getter type (being UK Mullard)? I wonder have you compare the Philip/ amperex Holland double 'D' getter black plastic base 5AR4 vs your mighty metal base Philip Holland 5AR4? How much better is it?
 
I am currently also using Sovtek 5AR4 which I found more spacy (but more noisy & not as powerful) compares to the Philip Holland black plastic base.

 

[Dubstep Girl]

cant see the getter on my black base hard to see. its uk mullard (f32)

 

[Xcalibur255]

"3DG4 - This tube has different specifications and may not work in all 5U4G amps"
 
I think it should be made clear that this tube will not work in any 5U4G amp unless it has been specifically wired to have a 3 volt heater pin hookup on the rectifier socket, of which there are no commercially available amps in existence to the best of my knowledge.  At best the amp will not function correctly with this tube in the circuit and at worst you'll fry your main power transformer because of the higher heater current draw.  Glenn's amps are unique in their ability to use this 3 volt tube.
 
Those of a curious nature are duly cautioned.

 

[magiccabbage]

  "3DG4 - This tube has different specifications and may not work in all 5U4G amps"
 
I think it should be made clear that this tube will not work in any 5U4G amp unless it has been specifically wired to have a 3 volt heater pin hookup on the rectifier socket, of which there are no commercially available amps in existence to the best of my knowledge.  At best the amp will not function correctly with this tube in the circuit and at worst you'll fry your main power transformer because of the higher heater current draw.  Glenn's amps are unique in their ability to use this 3 volt tube.
 
Those of a curious nature are duly cautioned.

and in he swoops with words of wisdom.......

 Thanks for the info. Its a good thing i am getting a glenn otl. Do you have any tubes to add to the list for people like me who would be interested in collecting? 

 

[SleepyOne]

cant see the getter on my black base hard to see. its uk mullard (f32)

 
Think it is single 'O' getter.

 

[Skylab]

Very impressive write up. I've never seen such an impressive comparison of rectifier tubes. Great stuff.

 

[GalaxyGuy]

Nice job, DG!  Thanks for the impressions.  I agree with you on most points (that I have had experience with).  Sounds like I might need to try out an RK60!

 

[Frank I]

Super job DG.  Very nicely down and an excellent reference for anyone needing  to know what each tube sounds like in different applications.

 

[MohawkUS]

Well, I've never owned a dynamic tube amp, but if I ever decide to get one you have my thanks in advance. At the very least it looks like I'm going to have to start showing up to Head-Fi meets, I'm extremely curious how those 'minty' tubes sound. I've never heard anything audio related described in that way before.

 

[thegrobe]

WOW!Awesome write-up. Very thorough, knowledgeable, and well written! Sure to be a reference for a long time to come. Thanks.