Got a ruler and a 2204 or 1987? Please help.

Discussion in 'Marshall Amps' started by Matthews Guitars, Jan 26, 2020.

  1. Matthews Guitars

    Matthews Guitars Well-Known Member

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    As you may know, I'm making restoration front and rear panels for the JMP era amps.

    What I don't have in my growing database yet is the back panel measurements for the 50 watt 2204 and 1987 models.

    I've learned that basically every feature found on the front and back panels are always centered on fractions of an inch. Whole inch, half inch, quarter inch, or eight inch increments.

    For example, on the front panel, the knobs are centered up 4, 5.5, 7, 8.5, 10, and 11.5 inches from the left edge of the panel.

    Sometimes, the holes are not quite exactly on position relative to the edge of the panel but their spacing is always the same. So it may not be exactly 4 inches from the first knob hole to the edge of the panel, but it will be 1.5 inches to the next knob hole.


    Would someone be so kind as to measure your back panels on your 2204 or 1987 and tell me where those holes are, relative to each other, and then, how far down the panel the first hole is from the left edge as you look at the amp from the back?

    With this information I can build the artwork for the panel and then prepare to make replicas.
     
  2. South Park

    South Park Well-Known Member

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    My 2204 back panel is 9 and half in to the first hole . On center it is great you are doing this
     
  3. Travis398

    Travis398 Well-Known Member

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    Looks like they changed the back panel for the 2204
     
  4. Travis398

    Travis398 Well-Known Member

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    20200126_140447.jpg

    It looks like they used the 1987 for a bunch of years I have a later one that is the same panel but they put a 3 amp sticker over the 2amp written on the chassis
     
  5. Travis398

    Travis398 Well-Known Member

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  6. Travis398

    Travis398 Well-Known Member

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    81' 2204 27" wide

    20200126_150539.jpg
     
    Last edited: Jan 28, 2020
  7. Travis398

    Travis398 Well-Known Member

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    81' 2204 27" wide

    20200126_150604.jpg
     
    Last edited: Jan 28, 2020
  8. Travis398

    Travis398 Well-Known Member

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    81' 2204 27" wide

    20200126_150621.jpg
     
    Last edited: Jan 28, 2020
  9. Travis398

    Travis398 Well-Known Member

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    I may have misunderstood what you was asking for, if you're looking for 17 inch panels forget the last 3
     
  10. Matthews Guitars

    Matthews Guitars Well-Known Member

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    If the last 3 inches are blank, that's fine. I know the panels are 17 by 2.5 inches.

    Thanks for the photos so far. It's appreciated.

    If there are two variants, I'll make both.
     
  11. Matthews Guitars

    Matthews Guitars Well-Known Member

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    Can I also get some photos of the ENTIRE backs as well? I'm not just doing the holes, I'm doing the artwork and legends, too, and want to be sure I've got them right.
     
  12. Travis398

    Travis398 Well-Known Member

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    sorry about the confusion, I thought you was asking for back panels for small chassis vs. large.
    the first pics are 17" the last 3 are 27" ignore last 3 Pictures.

    I'll get some pictures of the script. You need someone that owns an amp a year or two later than mine.
    they moved the serial number to the front so the back might be different.
     
  13. Travis398

    Travis398 Well-Known Member

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    This is from Reverb 81 2204 Looks like the script is different




    jskzkx1dtvrnr9zr8fnl.jpg
     
    Last edited: Jan 27, 2020
  14. Matthews Guitars

    Matthews Guitars Well-Known Member

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    I've got my own 100 watters to refer to plus lots of photos I've found. It's 50s that I'm adding to the list. The list of completed back panel types that are in production is getting pretty impressive.

    As I do these 50s, like the one above, I'm probably not going to replicate all those warnings labels. Unless someone really wants me to. Weren't they usually decals applied after printing anyway?

    I'm also more focused on the JMP era. Since the JCM800 series is newer, I'll address those versions after I've filled in all the gaps in the JMP catalog.

    The JCM800 era models, being younger, are less likely to need restoration panels as of yet.
     
  15. Travis398

    Travis398 Well-Known Member

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    I did get that part right, everything I posted is 50 watt. here is the 2204 I posted from reverb with the serial number on the front. I thought they just moved it to the front but after seeing the back with the numbers too it must be on both sides.

    awkfwwlj7llizlxbpqwz.jpg
     
    Last edited: Jan 27, 2020
  16. Travis398

    Travis398 Well-Known Member

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    This is the one you want, this is a 77' and it is exactly like the one I posted first which is a 69'
    they switched to cursive writing shortly after and the amps seem to overlap for a few years.

    it looks like when they switched to 2204 they kept the same back plate just changed the writing to cursive.
    they didn't really switch to cursive they just added it



    20200127_082353.jpg
     
    Last edited: Jan 27, 2020
  17. Travis398

    Travis398 Well-Known Member

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  18. Travis398

    Travis398 Well-Known Member

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    I assume this is the same panel as the first they just covered the 2 amp with a 3 amp sticker


    20200127_082445_001.jpg
     
  19. Travis398

    Travis398 Well-Known Member

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  20. Travis398

    Travis398 Well-Known Member

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    This is a 77' 2204 I believe this is the first year for the 2204. (This is from Reverb) Looks like they just added Master Model 50w MK2 lead to the left side.


    r6zlninbqsdfq7ckcjbx.jpg
     

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