1977 Marshall JMP 50 Watt Master Model Mark 2 Lead 2204 in Excellent Condition

Discussion in 'Member Classifieds' started by mattpas, Feb 14, 2020 at 11:59 AM.

  1. mattpas

    mattpas New Member

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    Sold
     
    Last edited: Feb 14, 2020 at 11:22 PM
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  2. MonstersOfTheMidway

    MonstersOfTheMidway Well-Known Member

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    $1749 is a good price given the condition of the amp (very clean and seemingly well-maintained). Question: are the transformers original? If not original but of high quality, then it's might still be a good buy.

    Thanks for posting/sharing the info.
     
  3. mattpas

    mattpas New Member

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    The transformers are original.
     
  4. MickeyJ

    MickeyJ Well-Known Member

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    i smell a bit of bullshit here, look at the laminations on the o/t and the p/t, the rust/dirt/aging arent the same( they always are on original matched xformers) the wiring for the o/t looks new to me to.
    That o/t is new-ish/re-wind.
     
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  5. MickeyJ

    MickeyJ Well-Known Member

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    just use a toothbrush with some water on the top of that o/t once a day for a week, wait a few days than take your photo again, it will be much more convincing.
     
  6. neikeel

    neikeel Well-Known Member

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    PT gets hot, hence corrosion on lams
    OT and choke do not
    Close ups of the wiring and selector will tell you.
    Does not look too phoney to me, although the end bells are not tight on the OT lams......
    More and better pics will prove.
     
  7. MickeyJ

    MickeyJ Well-Known Member

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    here we go again.

    dude, i lost you the other day when you tried to tell us that a bright cap doesnt make an amp bright and then offered a mathematical formula ( just listen to the two channels on any old marshall with a bright cap on one channel, the bright cap is the only difference).
    I don't think you're doing yourself any favors bro.



    upload_2020-2-15_9-23-29.jpeg upload_2020-2-15_9-23-29.jpeg

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    upload_2020-2-15_9-23-29.jpeg

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  8. MickeyJ

    MickeyJ Well-Known Member

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    theres literally hundreds/thousands of images online.
    knock yourself out.
    what you forgot when formulating your comment was that the o/t is right next to the output tubes, lotta heat there.
    these things don't have good airflow, the hot air lingers after the amp is switched off.
    When the amp cools, the condensating moisture simply rusts everything that isn't coated.
     
  9. MickeyJ

    MickeyJ Well-Known Member

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    look at the orange green wires, too bright, waaay too bright.
    lots of heat cycles, simple oxidisation ( everything breaks down, people) causes wires to get a dull finish to them.
    All my old amps are like this.
    This amp has quite obviously had an O/t change.
     
    Last edited: Feb 14, 2020 at 6:49 PM
  10. Crikey

    Crikey Well-Known Member

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    Love this site. Will never buy a vintage marshall without having my forum buds check it out via pics. Good catch Mickey
     
  11. mattpas

    mattpas New Member

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    The amp was gone over by a reputable amp builder in Michigan, Dean Zink who confirmed everything is original and just needed a retube.

    This is from Dean

    The numbers on the transformers are correct for the 1987 model amp from year 1969 thru 1979. The date code (for August 1977) on the power trans is correct for your J code amp with Sept, 14 1977 date on the tag.

    Power x-former 1202 64 -- date code (8 77)
    Output x-former 784 139
     
    Last edited: Feb 14, 2020 at 11:02 PM
  12. South Park

    South Park Well-Known Member

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    Anything that old and a power supply . You are going to replace something
     
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  13. MickeyJ

    MickeyJ Well-Known Member

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    i bet dean zink didn't buy it.
     
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  14. stickyfinger

    stickyfinger Active Member

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    One thing i know is most techs are not qualified to authenticate any vintage amp unless that particular model is their passion.

    Sadly I missed the original post.
     
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  15. MickeyJ

    MickeyJ Well-Known Member

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    that tech would have said this was legit too, because it had the right numbers on it.
    this image is of a 1969 50 watter.
    I would have pulled the images from todays post as well, a lot earlier.

    upload_2020-2-15_15-9-48.jpeg
     
  16. neikeel

    neikeel Well-Known Member

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    You are pretty black and white kind of guy - you do not do or choose to read nuance or subtlety at all. Read my comment again, I clearly mention distorted end bells.....suggesting they may have been disturbed ie replaced and asked for more pictures (ain't going to happen because someone scared the horses off). Re: the bright cap issue. It is the size relationship between the size of the cap and the resistance it is parallel that determines if it is bright or just 'gain' that comes through so small resistance smallish cap is bright, bigger cap or more resistance is wider bandwidth - less bright more signal ie perceived gain (yes with your ears) not purely bright. Are you sure you aren't Donald J (he doesn't do subtlety or nuance either!)?
     
  17. MickeyJ

    MickeyJ Well-Known Member

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    hey, I've got a couple ( a few) of these old amps and I double checked the bright cap thing, yes, the bright cap makes the amp brighter!!

    I don't know who donald J is bro, the veiled insult is totally lost on me.
    Just be more careful when chopping someone down, you won't need the tedious explanations.
     
  18. neikeel

    neikeel Well-Known Member

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    I’m not chopping any one down they can grow as tall as they want.
    Btw I’m sure you did your research and the pics you posted above were of an amp I restored (with NOS Drake PT) some years ago hence the different patina.
     
  19. MickeyJ

    MickeyJ Well-Known Member

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    dude, you're awesome.
     
  20. MickeyJ

    MickeyJ Well-Known Member

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    lets just keep it all on the bright side.
     

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