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Fender blues junior jewel light mod

Discussion in 'Modeling Amps, Plugins and Apps' started by jonmichael02302, Feb 24, 2021.

  1. jonmichael02302

    jonmichael02302 TDPRI Member

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    Was wondering if anyone could help me out? I've got a Fender Blues Junior (cream board version) & I'm looking to replace this dinky ragged LED with a better quality jewel light. (See attached photos)
    Is there a way to wire this socket into the existing circuit or a way to tap into something to give me enough power to run this jewel light with a #47 bulb? If not, I was thinking I could maybe just replace the red led with a white one, cut the bottom half of the socket off, run the white led up through the bottom & glue the exsisting butterfly clamp to hold the led in place. This way I can switch jewel colors later down the line if need be. Idk, I'm at a loss... anyone ever do this mod? Any suggestions would be greatly appreciated. Thank you guys!


    16142027633802280118636164205784.jpg 16142027880634194793538750481618.jpg 16142028357861511959160318860417.jpg
     
  2. jonmichael02302

    jonmichael02302 TDPRI Member

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    I forgot to add, I know the newer blues junior's have the better quality jewel light & it's wired directly into the tube pcb board somehow/somewhere.
     
  3. Scoops

    Scoops Tele-Meister

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    Sure,

    All you need to do is wire it to the 2 heater leads
     
  4. StrangerNY

    StrangerNY Friend of Leo's Gold Supporter

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    My Two Rock has got the jewel light with an LED already in it.

    - D
     
  5. jonmichael02302

    jonmichael02302 TDPRI Member

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    Are these the heater leads? The two green wires going into the tube pcb?

    Screenshot_20210225-033251_Gallery.jpg
     
  6. jonmichael02302

    jonmichael02302 TDPRI Member

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    I found the schematic for the FBJ IV which has the jewel & it's showing it wired into the tube pcb as I suspected. Are these the heater leads?
    Screenshot_20210225-034115_Gallery.jpg Screenshot_20210225-034132_Drive.jpg
     
  7. Spats Davenport

    Spats Davenport TDPRI Member

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    I did that to a Pro Junior, but it was about twenty years ago.

    Check the leads you’re planning on using, and if they’re 6.3V, they’re the heater leads.
     
    Scoops likes this.
  8. Scoops

    Scoops Tele-Meister

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    Yep, the green wires are usually the heater leads, but you do want to check for 6.3 V. If it is, you can tie to that
     
  9. jonmichael02302

    jonmichael02302 TDPRI Member

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    1. Just to be sure, to test these leads, i connect black to ground & test them with the red with the amp turned on?
    Couldn't get a proper reading on it. But I've run into a road block. The filter capacitor is in the way! Doh! See attached photo. So I got an easy solution... im going to cut the bottom black part off the lamp assembly & run the existing red LED up & inside it. Drill 11/16" hole & insert. I'll then be able to screw in my jewel & all is said & done. Only thing is, I won't be able to switch jewel colors but who cares. I'll stick with red. I could later on replace the red led with a white one but for now red works just fine by me. At least this way I don't have to worry about adding any additional load on the power transformer &/or screwing up the circuit. 16143177896183765604011103214954.jpg 16143181017471364956795276659598.jpg
     
  10. jonmichael02302

    jonmichael02302 TDPRI Member

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    Just wanted to say thank you guys for your input. All finished & it came out exactly as I imagined &/or wanted. Looks so much better than that dinky flat cheap looking led that came stock. Later I'll switch out the red led bulb & wire in a white one. This will give the option of changing jewel colors if need be. 20210227_170840.jpg 20210227_170843.jpg
     
    wblynch likes this.
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