Best Rectifier Tube for Deluxe Reverb

Discussion in 'Amp Input - Normal or Bright' started by Bighump, May 12, 2020.

  1. Bighump

    Bighump Strat-Talker

    Age:
    41
    Messages:
    349
    Joined:
    Aug 1, 2017
    Location:
    Louisiana
    Hey guys I have a Deluxe Reverb and the previous owner has a Weber Copper Cap SS Rectifier in it. I am wanting to go with a tube rectifier and wanted to know what was the best htat you have found for that spot? I know it calls for a GZ34 but I wanted to see what everyone thinks of the 5U4G and potentially other rectifier tubes. Thanks guys
     
  2. Triple Jim

    Triple Jim Most Honored Senior Member

    Messages:
    5,454
    Joined:
    Feb 27, 2018
    Location:
    North Central North Carolina
    They're not expensive. Why not try both and see which you like better, if you can tell a difference? Just verify that the power transformer can supply the higher filament current requirement of the 5U4. Or try a 5R4 instead.
     
    roadhog96 likes this.
  3. Engine Swap

    Engine Swap Strat-Talker

    Messages:
    228
    Joined:
    Dec 23, 2019
    Location:
    Chicago
  4. fezz parka

    fezz parka Duke of DILLIGAF Strat-Talk Supporter

    Age:
    61
    Messages:
    26,031
    Joined:
    Apr 21, 2011
    Location:
    ** **** ****** ***
    Depends. Some used a 5u4. The 5u4 draws more heater current.

    What copper cap is it? Because they do a mighty good job of emulating the sag of the tube rectifier. So well in fact that you won't hear a difference.
     
  5. roadhog96

    roadhog96 Senior Stratmaster

    Age:
    69
    Messages:
    1,281
    Joined:
    Oct 11, 2017
    Location:
    Drip-Edge Heaven, CT
    The SS rec offers a 2V drop over a tube so thats a plus also considering the plate voltage is much higher than it use to be. so every but helps. I use a GZ34 in my DR which is what it originaly came with.
     
  6. Tone Guru

    Tone Guru Senior Stratmaster

    Messages:
    4,258
    Joined:
    Dec 13, 2011
    Location:
    Music City TN
    5R4 - more voltage drop & sag, 2A directly heated
    5V4 - less voltage drop & sag, 2A indirectly heated

    If you are searching for sag and compression, the 5R4 is the first choice.
    The 5V4 is a good alternative for GZ34/5AR4.
    I normally avoid 5U4s because of the added heat and stress of the 3A filament.
     
    Last edited: May 13, 2020
    d801hme and Bighump like this.
  7. Sarnodude

    Sarnodude Senior Stratmaster

    Messages:
    4,240
    Joined:
    Sep 26, 2015
    Location:
    Mukilteo
    My recommendation would be to install the rectifier tube that the amp was designed for, and make sure your amp is healthy and properly biased.
     
  8. Bighump

    Bighump Strat-Talker

    Age:
    41
    Messages:
    349
    Joined:
    Aug 1, 2017
    Location:
    Louisiana
    I'm leaning towards that. I just need to get a multimeter to set the bias