2. amps-preamps
  3. 159918-149763

Preamp Rectifier Tube Confusion

I have a Primaluna Prologue 3 which uses 5AR4 rectifier tubes which id like to roll. I’m looking at ShuGuang WE274B tubes which list as replacements for 5AR4 / 5U4G / 274B. 
However, the Primaluna manual lists compatible tubes as: GZ34, CV1377, 5V4G, 5T4, 5Y3 and Upscale Audio also list the Philips 5R4GYS.

Any idea if the ShuGuang would work?
jl1ny

Showing 2 responses by jetter

jetter
3,092 posts
 
jl1ny, just wondering how you ended up with a 5AR4 in your preamp if it is not spec'd for it?
jetter
3,092 posts
 
@jl1ny 
However, the Primaluna manual lists compatible tubes as: GZ34, CV1377, 5V4G, 5T4, 5Y3 and Upscale Audio also list the Philips 5R4GYS.
My bad, I see now you are saying that the manual lists the above tubes as compatible IN ADDITION to the 5AR4.

I had read somewhere before what atmapshere is saying, that different but properly working rectifier tubes should not change the tone of a preamp, and I also believe the same for an amp, such as my Dynaco ST-70.

When I purchased my Mullard 5AR4 a number of years ago, they were reasonably priced, and they last forever and a day.  Its one and done. 





More to discover