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AUDIO FORUMS >> Replacement Tubes >> Shuguang 274b rectifiers
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Message started by jaco03 on 07/02/20 at 09:28:27

Title: Shuguang 274b rectifiers
Post by jaco03 on 07/02/20 at 09:28:27

Just wondering if the shuguang 274b is compatible with my 2013
Se84 zenamp? Any advice much appreciated
Thanks in advance.

Title: Re: Shuguang 274b rectifiers
Post by CAJames on 07/02/20 at 16:28:40

Maybe ;). A "true" 274B needs to see a smaller capacitor than a 5U4/5R4/GZ34 rectifier but there a plenty of people who say the Shuguang isn't a true 274B and is Ok with higher capacitance. If the capacitance is to high the tube will still work, it will just wear out faster.

I can't give you a straight answer (and the answer almost certainly varies from tube to tube) but what I know for sure is I bought some for my (Woo Audio) preamp/headphone amp and wasn't impressed. I'm an unrepentant NOS guy anyway, but IMO there are so many other rectifiers, both NOS and current production that are compatible that I wouldn't mess with it. But that is just my opinion, I've got a couple with really low hours I'd sell you cheap if you want to try it :).

Title: Re: Shuguang 274b rectifiers
Post by jaco03 on 07/03/20 at 08:16:38

Thanks James. All the decware site says is certain 274bs and I am not technical enough to know which is compatible If mine goes
I’ll just get one off decware.

Title: Re: Shuguang 274b rectifiers
Post by Lon on 07/03/20 at 13:28:03

It seems from all that I read that this Shuguang is compatible with the Decware amps. I believe in fact that the Valve Audio is likely a Shuguang manufactured tube itself.

Title: Re: Shuguang 274b rectifiers
Post by GroovySauce on 07/03/20 at 15:19:27

For another option. Check out thetubestore.com preferred series 274b / 5u4 It’s made in the Shuguang factory. Comes with a 6 month warranty. I’ve been enjoying it in a UFO25th. It is a tight fit on my ZP3 needed to tilt the tube a little so it doesn’t hit the transformer. Or get a socket saver and you’re good to go.

Title: Re: Shuguang 274b rectifiers
Post by CAJames on 07/03/20 at 15:58:13

Yes, I got mine from TheTubeStore. The question is do you like the sound?

Title: Re: Shuguang 274b rectifiers
Post by jaco03 on 07/04/20 at 08:12:11

Hi Lon and groovy
Thanks for chiming in. Appreciate it.
Cheers.

Title: Re: Shuguang 274b rectifiers
Post by CAJames on 04/04/21 at 21:21:35

So down at the bottom of my tube caddy I have a pair of Tubestore.com Shuguang "Preferred" 5U4G/274B rectifiers I bought before I knew what I was doing, and I finally got around to trying them in my UFOs. And I'll be darned if they don't sound really good. Not my favorites, for sure, but I could live with them. Of course I have no idea about how long they last, which is my primary concern with current production, but if anyone is looking for current production rectifier that isn’t crazy expensive I can recommend these.