NAD: DIY 5E7 Bandmaster build

Discussion in 'Amps and Cabs' started by Jeff Gehring, Feb 21, 2015.

  1. Jeff Gehring

    Jeff Gehring Silver Supporting Member

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    Today I finished up my 5E7 tweed Bandmaster build, and got it powered up and biased. All's good so far! I'm running a pair of 6L6WGBs, a 5U4, and a couple of RCA 12AX7s and a 12AY7 in V1. I'm looking forward to breaking this one in with my P90-equipped Lester; I used the (yellow) Jupiter caps, and loaded three Jupiter 10" 10SC speakers. I haven't put a tweed together for a while; I always forget how cramped those chassis are to work in! You start to feel like you're building a ship in a bottle.

    Anyway, here are a few pix:
    Chassis:
    [​IMG]

    Front:
    [​IMG]

    Back:
    [​IMG]
     
  2. JDJ

    JDJ Member

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    That's quite nice! You make the cab, too, or buy it?

    And what's that little circuit board on the left side? :)
     
  3. Jeff Gehring

    Jeff Gehring Silver Supporting Member

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    Thanks! It's a Mojo cabinet. The only things I produce with woodworking tools is sawdust and a collection of too-short boards.

    The little board on the left side of the chassis is just a place for the bullet-proofing 1N5408's that are in series with the tube rectifier. Shorted rectifier protection... The power resistors shown in the photo on that board have been removed, so all that is there are the two SS diodes.
     
    Last edited: Feb 21, 2015
  4. terrapin

    terrapin Member

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  5. SigXer

    SigXer Member

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    Wow! That's a super clean build. Clips?
     
  6. telenut62

    telenut62 Member

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    That's a beauty, congratulations
     
  7. alvagoldbook

    alvagoldbook Member

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    Nice build. I like how you screwed the bias pot directly to the board.
     
  8. RussB

    RussB low rent hobbyist Silver Supporting Member

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    Beautifully done, Jeff. I see so many cool things in there. Looks very clean and tidy as usual, and that's not easy in a Tweed style chassis
     
  9. Jeff Gehring

    Jeff Gehring Silver Supporting Member

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    Thanks, all! So far I'm liking the Jupiter 10SC's pretty well, but of course they've only got about an hour or so of time on them at this point.
     
  10. mark norwine

    mark norwine Member

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    Jeff,

    Did you use a high-current choke and build the power supply just like a 5E7, or did you do the plates-choke-screen arrangement like most other Fenders?
     
  11. Jeff Gehring

    Jeff Gehring Silver Supporting Member

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    Yep, just like a 5E7, choke input filtering. It's a 6H, 200mA rascal that's heftier than the OT...
     
  12. smolder

    smolder Gold Supporting Member

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    Just ordered a 12" Jupiter 50 watt for my 5E7. I love the 8" in the Bronco with a 6L6... anxious to hear the 12.

    Beautiful build btw.
     

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