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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
mofimadness's avatar
mofimadness
5,551 posts
 
Here's an excellent, (although quite long) thread on just these tubes:

https://www.head-fi.org/threads/dubstep-girls-massive-5ar4-5r4-5u4g-rectifier-review-comparison-rect...
jetter
3,099 posts
 
jl1ny, just wondering how you ended up with a 5AR4 in your preamp if it is not spec'd for it?
roberjerman
4,319 posts
 
All you will get with different rectifier tubes is a different voltage drop of the B+ voltage. And a corresponding change in voltages throughout the circuit. Use the rectifier that the circuit was designed with! A rectifier tube is NOT part of the music signal!
jl1ny's avatar
jl1ny OP
419 posts
 
@jetter The 5AR4 is the PL stock rectifier.
jl1ny's avatar
jl1ny OP
419 posts
 
@mofimadness Hey thanks for the link! Thats a great reference 👍
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