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    Shuguang 274B Rectifier Vacuum Tube

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    jdm

    Posts : 45
    Join date : 2011-04-04

    Shuguang 274B Rectifier Vacuum Tube

    Post by jdm on Sat Apr 07, 2012 11:04 am

    Is anyone currently using this rectifier tube in their ST-120 amp? The are for sale on ebay for $25 and the recommendation is limited as follows:

    "The maximum current capability for Shuguang 274B mesh plate tube is 150mA, suitable for tube pre-amp and mono-block single ended and 2A3 mono-block single ended. We would recommend Shuguang 274B rigid plate tube replace for 300B or any valve amplifier which has 5U4/5Z3/5AR4. The maximum current capability for this 274B rigid plate tube is 150mA."

    Will this work well in the ST-120? Any reports?

    http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180833674811&viewitem=&sspagename=ADME%3AL%3AOU%3AMOTORS%3A1123

    Thanks

    Bob Latino
    Admin

    Posts : 2374
    Join date : 2008-11-26
    Location : Massachusetts

    Re: Shuguang 274B Rectifier Vacuum Tube

    Post by Bob Latino on Sat Apr 07, 2012 11:42 am


    jdm,

    The VTA ST-120's need a rectifier with a 250 milliamp current flow capability. This is at the upper limit of a GZ34 tube rectifier. If a 274B can only flow 150 milliamps then (IMHO) the flow rate is too low to use on the VTA ST-120 or the VTA ST-70 for that matter.

    Bob

    Blitzen

    Posts : 47
    Join date : 2009-07-10

    Re: Shuguang 274B Rectifier Vacuum Tube

    Post by Blitzen on Sat Apr 07, 2012 2:38 pm

    I think Bob can safely say it's more than just his opinion...it's more like a fact!
    All you're going to do is burn those tubes out *very* quickly. If you're thinking about that tube because you like the glass shape, you should try to find a GZ33 or GZ37. They're going to be more expensive, but should hold up better.

    jdm

    Posts : 45
    Join date : 2011-04-04

    Re: Shuguang 274B Rectifier Vacuum Tube

    Post by jdm on Sat Apr 07, 2012 9:31 pm

    I assume the Mullard GZ34 F31 (1958)I have been running for a few months meets or exceeds the 250 ma requirements. The Mullard sounds great with the Gold Lion tube set. Shuguang or New Sensor should make a high quality GZ34 as an alternative to the the NOS Mullards from the 50's-60's give the current prices. Thanks for the specs on the ST-120 retifier.

    mantha3

    Posts : 298
    Join date : 2010-11-10

    Re: Shuguang 274B Rectifier Vacuum Tube

    Post by mantha3 on Mon Apr 09, 2012 9:05 am

    It would be cool to see someone make a replica of the GZ33 tube that Mullard made... Or a re-make of the Big Bottle Mullard GZ37 tube that is a work of art.

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