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nzlowie

5U4 or 5U3

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Hi guys

Earl shipped my Topaz with both 5U4 and 5U3 rectifier tubes so I'm picking they're interchangeable...

Want to try one of the 5U3 tubes in my Sun 2a3 amp which normally has the 5U4 rectifier.

 

So are they totally interchangeable?

 

Cheers

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You need to look at the data sheets for each, and other than the usual comparisions pay special attention to the capacitance max for the first capacitor for each tube, and look at what that cap is in value in the amp you are looking to use it in.

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What Ian said....

Edited by Mendes
.

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Was going to have a look myself but can't find a data sheet on 5U3 rectifier tube. From what I gather reading on the net they are close, but I can't say for sure without seeing the data sheets.

 

Maybe email the manufacturer of the Sun 2a3 amp and ask them for advice.

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Might be the 5u3c which is the Russian type 5u4g... in which case, yes, they are interchangeable.

The old black plate Winged C 5u3c from the late 50's are very nice tubes.

Edited by unclekanus

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Listening now......

Don't know if the old rectifier was tired or what but wow, nice improvement!

Happy as, as for long term who knows.

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