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AUDIO FORUMS >> Replacement Tubes >> About Rectifiers - Can 5R4G replace 5U4G?
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Message started by bmoze on 02/08/23 at 20:12:24

Title: About Rectifiers - Can 5R4G replace 5U4G?
Post by bmoze on 02/08/23 at 20:12:24

I’d like to verify that a 5R4G Rectifiier can replace a 5U4G.  This is for a Torii Mk4.  I thought I had seen in a post here that it could, but couldn’t find it again.  Thanks.

Title: Re: About Rectifiers - Can 5R4G replace 5U4G?
Post by Tony on 02/08/23 at 20:20:47


That's interesting.  I had the same question for my Torii MKIV.

Title: Re: About Rectifiers - Can 5R4G replace 5U4G?
Post by CAJames on 02/08/23 at 20:52:46

It will probably work fine, IMO. The 5R4 is in between the 5U4 and 5Y3 (or type 80) in the rectifier hierarchy, so if you'd use a 5Y3 in your amp then a 5R4 will be fine. The concern is that is it only rated for a 4 uF power supply capacitor. But I've used them in in my UFOs with no problem and I fell like the maximum current rating is very high and in general old stock rectifiers are really robust so I wouldn't hesitate. But the JMO/FWIW/YMMV.

Title: Re: About Rectifiers - Can 5R4G replace 5U4G?
Post by JD on 02/08/23 at 21:11:32

I've used 5r4gy rectifiers in my Torii III with no issues.


JD

Title: Re: About Rectifiers - Can 5R4G replace 5U4G?
Post by bmoze on 02/08/23 at 23:18:11

Just what I needed to know.  Thank you.

Title: Re: About Rectifiers - Can 5R4G replace 5U4G?
Post by Dilbert99 on 03/10/23 at 01:35:31

Yes, good to know, thanks here as well.

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