Questions about adding a tube rectifier transformer

Discussion in 'Amp Tech Center' started by Dan_Pomykalski, May 20, 2020.

  1. Dan_Pomykalski

    Dan_Pomykalski TDPRI Member

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    I need to add a filament transformer to my Champion 600 to get the tube rectifier to work, but I have a couple of questions I'm hoping someone can answer.

    I'm assuming I would solder the primary wires to the power switch?

    Would I need to add another fuse? Or could I use the fuse holder I already have? If I used the same fuse holder would I need to increase the fuse?

    I wasn't quite sure what to search for, so sorry if this has already been covered. I tried google, but I didn't see any schematics for adding a transformer.
     
  2. corliss1

    corliss1 Friend of Leo's Platinum Supporter

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    The primary side would be 120V, so you'd wire that to the same switch as the main power of the amp. You'll be using the same main fuse.

    I'd probably bump the fuse by 500mA to handle some of the extra inrush current that'll happen when you first switch it on, I'm guessing that'll be enough.
     
  3. Dan_Pomykalski

    Dan_Pomykalski TDPRI Member

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    Perfect! Thanks!
     
  4. Dan_Pomykalski

    Dan_Pomykalski TDPRI Member

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    Would a dim-bulb tester let me know if the fuse wasn't big enough?

    Edit: Also, thank you for not replying with “why are you doing this” and the “tube amps have lethal voltage” lecture.
     
    Last edited: May 20, 2020
  5. dogmeat

    dogmeat Tele-Afflicted

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    prolly not since that would be the current limiter
     
  6. corliss1

    corliss1 Friend of Leo's Platinum Supporter

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    So you blow a fuse? If so, put in the next size up :D That's a pretty cheap science experiment.

    Might be a good idea to start with the light bulb limiter to make sure you don't have a miswire somewhere though, or else putting in a larger fuse could cause problems.
     
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  7. dan40

    dan40 Tele-Afflicted

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    If your amps' original power transformer has a bad filament winding preventing your rectifier tube from working, Weber sells a "copper cap" rectifier plug in that works without the 5v filament winding. You simply plug it into the rectifier socket and it will deliver the same voltage that the original rectifier tube provided.

    https://www.tedweber.com/wy3gt
     
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  8. corliss1

    corliss1 Friend of Leo's Platinum Supporter

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    @dan40 - he's talking about the reissue, which didn't have a rectifier tube/socket/5v wiring from the factory.
     
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  9. Jon Snell

    Jon Snell Tele-Meister

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    Fitting a valve rectifier will reduce the available HT by about 60volts, depending on the chosen valve. That may give you less power before it breaks up.
     
  10. Lowerleftcoast

    Lowerleftcoast Tele-Holic

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    My silverface deluxe reverb suggests a 1 amp slo blow fuse. The smaller 5E3 deluxe suggests a 2 amp slo blow fuse.

    I bet your champ can live with 1 amp to 2 amp without problems.
     
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