Longest Metro Plexi 50 Build

Discussion in 'Building the Classics' started by Exojam, Aug 4, 2018.

  1. neikeel

    neikeel Well-Known Member

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    Nearly there!!
     
  2. Exojam

    Exojam Well-Known Member

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    If can get to the point where I do not need more surgeries and get off the antibiotics I may make some real progress.

    How does she look so far?
     
  3. Exojam

    Exojam Well-Known Member

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    Well it is all put together. In some ways I am happy with how it came out but the MAJOR OCM in me will see a wire that is not perfect and it will bother me.

    In the next few days it will go through it voltage checks without and than with the tubes. I will start it with JJ’s even though I just do not like them. Once I am satisfied with how that goes I will put my NOS tubes in. Not sure what will go in the preamp section but I have some (supposed to be) very nice Mullard matching power tubes.

     
    stryker59 likes this.
  4. Exojam

    Exojam Well-Known Member

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  5. Chris-in-LA

    Chris-in-LA Well-Known Member

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    The black wire that you used on top of the board, is that shielded?
     
  6. Exojam

    Exojam Well-Known Member

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    Yes it is.
     
  7. neikeel

    neikeel Well-Known Member

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    I think he is confused. It is insulated bus wire. It does not need (or appear to be shielded). The Metro/Valvestorm kit comes with correct bus wire and insulation. I would always encourage builders new to this type of build to do that and ideally use perf'd board to loop the correctly coloured wires through the holes to the turrets to help with trouble shooting if there are problems later.
     
  8. Exojam

    Exojam Well-Known Member

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    Sorry for the wrong information.

    I definitely wish I would have ran the wires all the way through the turrets when I wired it up.
     
  9. Chris-in-LA

    Chris-in-LA Well-Known Member

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    Run them from the bottom to the top of the turret? On my last build I just wrapped them around the base of the turret. I see that Metro has you fold the end of the wire and insert it into the bottom, is that what you did?
     
  10. Exojam

    Exojam Well-Known Member

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    For those black wires and two others I wrapped them around the turrets.

    All other wires I installed as directed in the manual.
     
  11. Chris-in-LA

    Chris-in-LA Well-Known Member

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    That build is very clean with the wires run from the bottom. I’m going to try that on my Metro 50 Plexi/2204 conversion project.
     
  12. Exojam

    Exojam Well-Known Member

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    Thank you.

    I have to give Neikeel a ton of credit for always being there to offer his help and constructive advice. He is one very intelligent person when it comes to amps.
     
  13. Exojam

    Exojam Well-Known Member

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    Well I ran into a problem when I started on the voltage checks, the 3 amp fuse was blowing.

    With the help of a few folks they noticed I wired the voltage regulator incorrectly. What a dumb as move on my part and as slow as go I am not sure how in the heck I pulled that one off but I did.

    Anyway, just waiting for some more fuses and I will rewire the voltage regulator and see what I get.
     
  14. Chris-in-LA

    Chris-in-LA Well-Known Member

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    Voltage regulator? Is that the bridge rectifier?
     
  15. Chris-in-LA

    Chris-in-LA Well-Known Member

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    Oh yeah, I see the problem but I wouldn’t have noticed it without you saying it, the wiring to the rectifier was wrong.
     
  16. Exojam

    Exojam Well-Known Member

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    Yeah I meant to say rectifier and not regulator.
     
  17. Chris-in-LA

    Chris-in-LA Well-Known Member

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    I’m getting ready to do a Metro kit with that same rectifier, did you get yours all sorted out yet?
     
  18. neikeel

    neikeel Well-Known Member

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    The rectifier is marked with ~ on two pins, +ve on another and -be on the fourth.
    The kit uses single pole switches so the PT is hooked directly to the ~ terminals and the + to the standby switch which then goes to the mains cans and choke etc. The -ve has no connection on a 50w. I personally prefer to use two double pole switches for mains (to switch live and neutral synchronously) and to switch the ac from the PT to the diode block But the kit arrangement is ok.
     
  19. Exojam

    Exojam Well-Known Member

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    I just got my fuses in yesterday so after a bit of cleaning of my van that was totaled (getting all the stereo stuff out) I will be able to rewire and test a bit today (hopefully).

    And if you can do your kit like Neikeel mentions, I would. Unfortunately I reached out to him for help after I already purchased my parts.
     
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  20. Exojam

    Exojam Well-Known Member

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