vintage MARSHALL JTM MARK 3 QUESTIONS !

Discussion in 'Amps and Cabs' started by cubado, Sep 20, 2006.

  1. cubado

    cubado Member

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    My neighbor has one of these....150 watts. He offered to give it to me...he bought it way back....he think's its over 35 years old!

    Anybody own one? What are they like?

    What are they worth?

    Any and all info appreciated.

    Way too much amp for me....so probably sell it and split $$$ with him!

    TX
     
  2. Jerrod

    Jerrod Silver Supporting Member

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    150 watts? WTF? I'm not aware of any 150 watt Marshall guitar heads, never mind a JTM.

    Probably should post some photos and/or head over to the Plexi Palace.
     
  3. 94_mccarty

    94_mccarty Member

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    You can get a general idea of the power level by just counting the power tubes...2x=50watt, 4x=100watt, 6x=150watt.
    look at the number of input jacks (4=vintage)
    look at the serial number suffix (a=1969 and it goes up from there)
    observe if the gold control panel is metal or plexi (as in plexiglass)

    all that should give you a pretty good general idea. Post some pics or more detailed info and you'll get bunches of info.

    good luck!
     
  4. cubado

    cubado Member

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    Tx guys !

    Here are a few pics...

    [​IMG]

    [​IMG]

    [​IMG]


    I was reading info on the back label "JTM 45 MARK III " but it does say "JMP" on front left !!

    Also 175 watts....not 150 like I mentioned earlier.

    Serial # s/a 7682 A
     
  5. rooster

    rooster Member

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    The 175 watts on the label refers to the power consumption, not the power output. If it has 2 power tubes, it's a 50W, if it has 4 power tubes, it's 100W. Actual power output depends on many factors, they're usually higher than listed if you play with poweramp distortion.

    rooster.
     
  6. Thames

    Thames Member

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    Dude,
    this is 175 watts POWER CONSUMPTION. Not "sound" wattage.... JTM45 are usually 30-50w.
     
  7. cubado

    cubado Member

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    from Marshall date codes I found on the Plexi Palace site....TX for the info...

    It seems this might be a 50watt from @ 69 / 70 !!

    I will see how many tubes later today...

    Appreciate the info....

    Are these sought after amps? Any idea of price?

    Cheers
     
  8. hogy

    hogy Member

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    The back panel with the model tag is from a different, earlier amp. Could also be a leftover they used up at the factory. The amp is a '69/'70 JMP50.
     
  9. Formvar

    Formvar Supporting Member

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    That is a really clean 50 watt Metal panel that you have there.:crazy It is worth a good amount of cash FYI. If the electronics have not been messed with at this point a collector would love to have that amp. You should take your time and do the research to find out what the correct current market value is at this point.

    How does it sound?
     
  10. cubado

    cubado Member

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  11. hogy

    hogy Member

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    Did you read the replies so far? Yours isn't a Mk.III. It also can damage the amp to turn it on without speakers.

    It is a nice and clean amp, maybe slowly step away from it and put it on ebay. What it will sell for is what it's worth.
     
  12. cubado

    cubado Member

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    :MMM Cheers hogy..... wont do that again... BIG TX !

    I did read.... but I bad.... a little confused.

    Tx for straightening me out.... :crazyguy

    Just got off the phone w/ neighbor.... he only wants 25% from sale.... but.... 50/50 is what it will be!!

    Now I need to find a cab.....

    Anybody in Boston area w/ cab for rent?? LOL
     
  13. hogy

    hogy Member

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    Cool, be careful with that power cord.
     
  14. Roe

    Roe Member

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  15. cubado

    cubado Member

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    of course I need to check into its originality.... but any idea of worth if 100% ?

    I will also do my research...but nothing I have found so far matches it exactly....

    TX
     
  16. hogy

    hogy Member

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  17. cubado

    cubado Member

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    Wow... TX !

    Cant wait to hear this thing!
     
  18. Kiwi

    Kiwi Silver Supporting Member

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    If and when you acquire it and sell it, you will likely be asked to provide photos of the interior of the amp.

    If it's a vintage piece, buyers will first want to see pictures of the amp chassis. Pull it out carefully and remove (and keep!) the tubes. Make a note of what brand of tubes are in there.

    The top view of the amp chassis will let buyers see if the transformers are original, the factory inspection sticker, and other components.

    The underside of the chassis will expose the wiring, soldering and components. Take clear pictures of this. Handle the chassis carefully and don't touch any of the little cylinder objects and parts. They can carry very high stored voltages. Don't run it without a speaker attached. The power cord looks frayed. Please be careful.

    We'd all be interested to see the pictures of the interior of this amp. As has been said, take your time and research this one carefully.

    Kiwi
     
  19. cubado

    cubado Member

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    Careful it will be.....I think I will have my buddy that knows amps help me out.

    Great info Kiwi ( and others ! ) ... much appreciated !

    I already have a few TGP'ers wanting in on the " please notify me when its for sale " list !
     
  20. Jerrod

    Jerrod Silver Supporting Member

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    FWIW, the "going rate" on those seems a little variable. The amp that Hogy linked to seems to have sold for a particularly high price... It seems like 1970 amps range from about $2500 to $3000 depending on condition, tubes, which way the wind is blowing, etc.
     

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