2. amps-preamps
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Can anyone recommend a better rectifier tube?

I have replaced the 5R4 rectifier tubes in my Jadis SE-300B amps twice in the past year. In February I installed JAN CETRON NOS 5R4WGB tubes purchased from TubeDepot. The amps have been used sparingly since then yet the tubes are now weak. This was the case with a previous set of theses tubes. Since installing these tubes I have been running the Royal Princess™ 300B tubes. Prior to that I used Western Electric 300Bs (manufactured about 10 years ago). Can anyone recommend a better brand or type of rectifier tube for this amp? Thank you.
cjbeach
sidssp
1,077 posts
 
Many of the so called NOS tubes are actually OUT (Old Used Trash). Be careful when you buy them.
salectric
753 posts
 
I have had very good results with RCA 5R4GY rectifiers in both my preamps and choke-input power amps. They are pretty cheap and easy to find, and they last a long time.
dodgealum's avatar
dodgealum
1,404 posts
 
I'm trying to persuade Sophia Electric to make a 5AR4/GZ34 rectifier tube that would replace the Mullard NOS in my Modwright LS100. I am already using Sophia's 6SN7's and they are wonderful. So, anyone else interested please send them an email and let's see if we can encourage them to add to their product line.
hifihvn
943 posts
 
11-14-11: Dodgealum
I'm trying to persuade Sophia Electric to make a 5AR4/GZ34 rectifier tube that would replace the Mullard NOS in my Modwright LS100.

Just to be on the safe side, don't try a 5AR4 in an amp that calls for a 5R4. The 5R4 can handle more voltage, so stay with the one the manufacturer of the amp recommends.
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