2. analog
  3. 192084-175658

274B Tube Comparison

I am experimenting with replacing some 5U4G' rectifier's for modern 274B's in my system.  The traditional WE 274B's had a lower output current (150ma) and did not have the tolerance to substitute directly in the 5U4G slot.  But several models have evolved with a higher output (220-225ma) and can be used in place of the 5U4G--they even tout it.  Three such tubes are:

Takatsuki, Sophia Electric, Acme PSVANE.

It would be fun to try all three brands in a head's up comparison, but it begins to be an expensive proposition.  In my case, I would need three of each brand to do a full comparison in my chain: one in each of two 300B power amp monoblocks and one in an all-tube DAC.

Has anyone had good results with any of these? And has anyone compared the sound characteristics of these three tubes? 

gregjacob

Showing 1 response by gregjacob

gregjacob OP
116 posts
 
dogberry  Sorry for the confusion.  I am going from 5U4G to 274B.  Yes, it is a concern to just jump from one to the other without proper research to confirm compatibility.  I'm taking baby steps. 
 
tksteingraber Thanks for the Psvane plug.  I already have one Sophia Electric 274B Aqua II that just arrived.  I have just replaced the Sophia Electric 5U4G in my tube-based DAC and the new 274B is just a few hours into burning in.  I can clearly hear differences between the two but still letting it settle.  I will be wondering how it compares to the others I listed. 
More to discover