Is It Possible To Put A Tube Amp In A Marshall Mg Combo?

Discussion in 'Marshall Amps' started by JacksonCharvelAddict, Jun 26, 2017.

  1. JacksonCharvelAddict

    JacksonCharvelAddict Well-Known Member

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    I have an old Marshall MG50RCD that my grandmother bought me back when I graduated from high school. I have not played it in a long time but I can't bring myself to part with it. I always loved the clean channel and I discovered at band volume that the clean channel has a very pleasing breakup to it that I found way better than the drive channel or any pedals I ran into it. I am guessing the worst part of this thing is the speaker. I am wondering if any of you guys have gutted old MGs and put JCM800 circuits in there?
     
  2. Geeze

    Geeze Well-Known Member

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    Replace the speaker - easier, cheaper and faster. Or go to a 1x12 or 2x12 closed [my preference] or open back cab. Converting to a tube amp would require new pretty much everything including [I'm guessing here] trannys. Blast the sh*t out of that clean channel as you save up $$ [if you want to go down THAT deep dark rabbit hole] for a tube amp.

    Russ
     
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  3. Kiko

    Kiko Active Member

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    +100 on what Geeze said. Economics and practically isn't there, just enjoy the mg.
     
  4. charveldan

    charveldan Well-Known Member

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    Waste of time & $$$
     
  5. JacksonCharvelAddict

    JacksonCharvelAddict Well-Known Member

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    Thanks guys. I figured the only way it would be worth it is if there was a tube amp that had the same dimensions.
     
  6. Gunner64

    Gunner64 Well-Known Member

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    Not an mg..but I have gutted an AVT150H and built an 800 2204 clone in it. Shit canned the old chassis..faceplates and modified a mojo 800 chassis and plates to fit..cost about 600 or so before tubes..classictone trannys/ choke..turned out great. But not any resemblance to what it started out as.
     
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  7. marshallmellowed

    marshallmellowed Well-Known Member

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    If all you care about is keeping the combo box, then yeah, anything with the right dimensions could work. If you're talking about adding tube circuitry to the MG chassis, I wouldn't even attempt it.
     
  8. JacksonCharvelAddict

    JacksonCharvelAddict Well-Known Member

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    I assumed that nothing in there would be worth re-using.
     
  9. Matt_Krush

    Matt_Krush Well-Known Member

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    Nothing in there can can be used for a tube amp...maybe the jacks and pots...but that's nickel-dime stuff.
     
  10. JacksonCharvelAddict

    JacksonCharvelAddict Well-Known Member

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    I figured the knobs would be about all that is usable. Sounds like I just need to keep an eye out for a tube amp that will fit.
     
  11. Gunner64

    Gunner64 Well-Known Member

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    Id build an 18w tmb in that sucker...mod the 18w chassis and plates to fit..
     
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  12. myself80

    myself80 Active Member

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    Hello!
    I built an 18 watt 6v6 amp with a 2204 pre amp in an old model # 5010 master lead 30. I love the amp!. However, the most work was in modifying the chassis for the tube sockets, filter cap holes, standby switch, 2nd input, etc, etc.
    I also swapped the original g12-75s speaker for a g12H(55).
    If you enjoy metal working like me, it will be fun.
    I would say go for it!

    Cheers!

    For info, here is the link to my build:
    http://www.marshallforum.com/threads/new-18-watt-2204-combo-build.86368/
     
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  13. JacksonCharvelAddict

    JacksonCharvelAddict Well-Known Member

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    This is exactly what I was thinking. Thanks a lot for the link!
     
  14. Gunner64

    Gunner64 Well-Known Member

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    I had to do some work on the mojo 800 chassis and plates to make them fit the avt headshell, but I think it turned out great..sounds incredible too. Very rewarding if you choose to do it. And you could keep the guts out of your combo if you ever decide you want to change it back. CAM00281.jpg
     
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