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AUDIO FORUMS >> Replacement Tubes >> SE84UFO2 rectifier tubes - all 5Y3GT compatible?
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Message started by canonken on 10/26/20 at 03:18:34

Title: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by canonken on 10/26/20 at 03:18:34

Hi,

I posted a question on another forum and got some snarky/nasty replies saying the 5Y3GT could not work where 5U4, 5AR4, etc. would work.

On the Decware website, I see these specific models listed as being compatible:
5U4G
5U4
5AR4
5Y3GT
274B (only some)

I have two NOS RCA 5Y3GT and some 5U4GB (one Westinghouse, one GE) tubes - all tested as good. Should I be able to use these?

Thanks!

Title: Re: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by Lon on 10/26/20 at 06:33:18

Yes, they should work just fine.

Title: Re: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by GroovySauce on 10/26/20 at 13:56:00

For the 274b the tube must be designed for a 47uf cap.

Title: Re: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by Rivieraranch on 10/26/20 at 18:29:22

There are the Shuguang marked 274B that are electrically 5U4. They have enough oofs to withstand startup n the Zen.

Title: Re: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by Lon on 10/26/20 at 19:56:05

Yes, and the Sophia Electric Aqua as well.

Title: Re: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by canonken on 10/26/20 at 23:46:55

Thanks all, appreciate it! Well good news is I now have 4 'known good' rectifier tubes, as well as two likely NOS (from a trusted friend, but he does not have test gear) GE and RCA on top of that.

Also have tested NOS GE 6DJ8 and 6N1P-EV 'Voshkod Rocket' - as well as a set of new JJ EL84 (that were never used).

If you know any of these are NOT OK, don't be shy about telling me. Maybe they suck and don't sound good, but if they work and won't hurt the amp, nice to have some stuff on hand.

Thanks again!

Ken

Title: Re: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by Lon on 10/27/20 at 00:16:58

Those tubes will work in the amp and will be fun to experiment with.

Title: Re: SE84UFO2 rectifier tubes - all 5Y3GT compatible?
Post by canonken on 10/28/20 at 23:25:14

Appreciate it, thanks all