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5E3 layout sheet

Discussion in 'Amp Tech Center' started by mondo, Jan 2, 2021.

  1. mondo

    mondo TDPRI Member

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    FFC2C8AD-4315-47CE-88E2-584476F56C51.jpeg
    I sketched a blank template of the “Tweed Deluxe” layout to print extra copies for ease of illustration. It’s helping me as a learning tool to map out different grounds, B+, voltage nodes separately. If anyone would like to use this feel free. I will scan a copy and post a PDF later.
    You can add your own pinouts, jack tags and ground locations to match whatever you have planned. The dashed lines are wires under the board or from top of chassis. Let me know if anything is wrong with this. Or use some white out.
     
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  2. Lowerleftcoast

    Lowerleftcoast Friend of Leo's

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    I doubt it would be considered *wrong*.

    The under board ground wire, shown on the diagram below, may attach to a different location depending on the chosen ground scheme. I suppose some white out would take care of the wire location if the chosen ground scheme differed from this layout. Your choice.:)
    Inked5e3try_LI.jpg
     
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  3. theprofessor

    theprofessor Poster Extraordinaire

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    Because I saw your avatar: That Bell & Howell speaker looks just like a B&H Jensen P12P I had. It would sound great in a 5e3, if that's what it is!
     
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  4. mondo

    mondo TDPRI Member

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    I collect old Bell and Howell stuff. They are some of my all time favourite speakers for clean tones. I don’t know if they are truly P12P. They are rated at 25 watts. Some are smooth cones and some are ribbed. The basket design is completely different from the typical Jensens. They look like perm o flux baskets. BH made them in Canada and Chicago for many years.

    Thanks for the annotation to the sheet lower left coast.
     
  5. ce24

    ce24 Poster Extraordinaire

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    This pic is in a post above yours...this is a great graphic layout pic. 1D9F8E4D-ABA6-423E-A459-91E1D82052BA.jpeg
     
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  6. 2L man

    2L man Tele-Meister

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    Is there explained why that quite complicated grounding is used? I just wrote to another thread about simple grounding I prefer so I am interested if there are better?

    It looks strange how there is ground bus thru potentiometer cases which connests to input jack and there is V1 ground which connects to other input jack. It seems there comes ground loop if inputs are connected together if not without?

    Perhaps it is aluminium chassis which is thought to need potentiometer case grounding? I don't install pot case ground bus even when I use aluminium chassis!
     
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  7. mondo

    mondo TDPRI Member

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    My build has stainless steel chassis and the pots/jacks aren’t insulated. The pots have small tabs that push tight against the chassis. I hate soldering to pot shells but find it’s doable when using lead solder and flux after sanding them. Maybe insulated jacks and pits are a superior method but the grounds seem like a lot more work.
     
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  8. D'tar

    D'tar Friend of Leo's

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    Don't over think that graphic..... You are correct.... NOT optimal grounding scheme used there. Mojo needs to move to version 4.0 and bring their layout into reality. They took a couple steps backward moving to this image. IMO of course!
     
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