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PT for Proluxe build

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  • PT for Proluxe build

    I've been looking for a beefier PT for my Proluxe build - I just don't trust the Weber 02513. I have a question: if the specs of a PT describe the 5V rectifier filament secondary as "2.5-0-2.5" center tapped, would I just NOT connect the CT to anything (tape it off)? This is an Edcor xpwr178 that I'm looking at. I thought about getting a Hammond 276X, but I can't find anyone who has the new version(with 125V primary) in stock. I'm open to suggestions...

  • #2
    "beefier PT for my Proluxe build"
    http://www.tubesandmore.com/sites/de...s/p-t290bx.pdf I don't think 5 volts over 120 is going to break it.
    Mercury Magnetics - Fender amp transformers

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    • #3
      Thanks for the suggestion, but the 290BX is only 138mA; the Weber I have in there now is supposed to be 150mA and it doesn't quite cut it. It's enough for 6V6's, but runs way too hot when I try 6L6's in it. I'm pretty sure I need something in the 180-200mA range.

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      • #4
        Originally posted by rockybottom16 View Post
        Thanks for the suggestion, but the 290BX is only 138mA; the Weber I have in there now is supposed to be 150mA and it doesn't quite cut it. It's enough for 6V6's, but runs way too hot when I try 6L6's in it. I'm pretty sure I need something in the 180-200mA range.
        The mercury is over-sized, and has extra current, or so they say at the factory.

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        • #5
          Yes you would tape off the unused CT of the 5V winding.
          If you go with the Hammond, make sure to get the new version. The heater voltage is high with the new version, with the old 117V tap it will probably be around 7V or more with 123V input.
          Not the exact same model Hammond, but I think the heater windings would be similar: http://music-electronics-forum.com/t36264/#post343868
          Originally posted by Enzo
          I have a sign in my shop that says, "Never think up reasons not to check something."


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          • #6
            Check out some of the offerings from Magnetic Components, this one or something similar may work.

            http://www.classictone.net/40-18029.html
            "In theory, there is no difference between theory and practice. In practice there is."
            - Yogi Berra

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