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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?
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jjss49
6,612 posts
 
@jl1ny

just don't let the eyes fool the ears

bling and good sound are separate departments, need separation of powers  :)
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jl1ny OP
419 posts
 
@jjss49

I have my 3 favorite recording’s that are superb at demonstrating vocals, soundstage and separation. They also do the magic act and make the KEF Q150’s disappear...if I can’t hear a difference then I’ll chalk up the 5R4GYS to pure aesthetics. 🤷🏼‍♂️
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goose
710 posts
 
Just save yourself a bunch of time and grief by contacting Andy Bowman at Vintage Tube Service to get specific guidance.  I only deal with Andy on my tube purchases and he knows what he is doing at a fair price.
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