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Changing gear, going to step back and take new approach...

Discussion in 'Shock Brother's DIY Amps' started by DrPepper, Nov 1, 2020.

  1. Nov 1, 2020 #1
    DrPepper

    DrPepper Friend of Leo's Ad Free Member

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    Instead of building an amp, I want to build a power supply that will have multiple B+ voltages and switch able rectification for either SS or tube.

    A good strong power supply so that I can run all types of amplifier components.

    I want to be able to make patch cables using tube bases and tube sockets to make the connections.

    I asume using multiple transformers would give best quality as a custom transformer with as many secondary taps as I want would be cost prohibitive. So, 1 big transformer and dropping resistors?

    I would like to be able to provide power for various tube types and styles (SE/PP). There will be tube rectifers on board.

    First project to provide power for will be a headphone amplifier.

    Thinking of doing it "gravity" chassis style for ease of construction. This method you make some sort of support for a flat piece of metal with the guts on one side and transformers and valves on the other side. I have some pieces of oak that would look nice. And, know a shop that can laser cut a chassis plate for me.
    Here is apic of my inspiration:
    [​IMG]
     
  2. Nov 1, 2020 #2
    Tom Kamphuys

    Tom Kamphuys Tele-Holic

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    Something like this has crossed my mind, but I was too afraid. Tube guitar amps are not engineered in the 'normal' way where each stage can be treated separately. Tone stacks load down gain stages. Sag caused by a class AB output stage is part of the sound. The warm gain stage and cathode follower work together (in a Marshall), ...

    Having said that, here are some building blocks:
    http://www.valvewizard.co.uk/universalpcbs.html

    I've also seen a video on YouTube of a modular harp tube amp. I can't find it though.
     
  3. Nov 1, 2020 #3
    fasteddie42

    fasteddie42 Tele-Afflicted

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    nvm.
     
    Last edited: Nov 1, 2020
  4. Nov 1, 2020 #4
    drew1d

    drew1d Tele-Meister Silver Supporter

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    Wild stuff dude.
     
  5. Nov 1, 2020 #5
    Mongo Park

    Mongo Park Tele-Afflicted

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    Keep us in the loop, I am always interested in seeing new things. Who knows it might work out as a great DIY method.
    Cheers Ron
     
  6. Nov 1, 2020 #6
    FenderLover

    FenderLover Poster Extraordinaire

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    Sounds like a cool idea for a bench supply. A Twin Reverb PT feeding a regulator circuit with 2, 3, or 4 different rectifiers. Hmmm...
     
    Last edited: Nov 1, 2020
  7. Nov 1, 2020 #7
    Phrygian77

    Phrygian77 Friend of Leo's Gold Supporter

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    Have a look at this. Just a warning though, if these are built to order like most of their transformes, it'll take 2 months to get it.

    https://www.edcorusa.com/tbpwr-hv1
     
    Tom Kamphuys likes this.
  8. Nov 1, 2020 #8
    Wally

    Wally Telefied Ad Free Member

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    good observations. I have to make this observation, though. Marshall did not build the first amp with that cathode follower topography. When you find the schematic for the first Marshall, this is what you will find.....and all of the good Marshall’s..imho...follow this basic plan...

    https://schematicheaven.net/marshallamps/jtm45_first.pdf

    Marshall merely built the first reissue of that amp.
     
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  9. Nov 1, 2020 #9
    Wally

    Wally Telefied Ad Free Member

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    Dr. Pepper, take a look at the amp in this thread. I have somethings like this sitting around.....might be a jumping off point....5u4, 5y3, 6L6’s, 12v6’s and the ability to support more tubes than you might imagine to be useful.

    https://el34world.com/Forum/index.php?topic=23884.0
     
    DrPepper likes this.
  10. Nov 1, 2020 #10
    DrPepper

    DrPepper Friend of Leo's Ad Free Member

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    You rock, thanks...
     
  11. Nov 1, 2020 #11
    DrPepper

    DrPepper Friend of Leo's Ad Free Member

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    K.I.S.S. Got to keep that in mind, I'm err on the stupid side.

    The power transformer Wally linked to looks ideal for what I have in mind.

    Now, to come up with some sort of patch bay arrangement to configure output sockets and route the various voltages.
     
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