JTM-30, Different Problem, PLEASE HELP!

Discussion in 'Marshall Amps' started by Gene Ballzz, Feb 19, 2013.

  1. slide222

    slide222 Well-Known Member

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    and the great thing about marshall is they checked the mods out before they biased it - if you in the uk its just easy.

    mitch , you say was
     
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  2. Mitchell Pearrow

    Mitchell Pearrow Well-Known Member

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    Yes we lost him on 12/15/07
    He stepped out onto a busy street and was hit by a truck.
     
  3. slide222

    slide222 Well-Known Member

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    so sorry to hear that bud,
    pete
     
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  4. ibmorjamn

    ibmorjamn Well-Known Member

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    I have one on the way , I read another post from back in May of 19 . One guy who had a JCM 900 liked it as well . Since I let my JCM 900 go I have not owned a Marshall I would keep. I hope this will change that.
     
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  5. slide222

    slide222 Well-Known Member

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    if you like 900's you will love the red channel , I am certain of that , and these were only made for 3 years ,
     
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  6. Gene Ballzz

    Gene Ballzz Well-Known Member

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    @slide222 is helping to confirm my allusion to the fact that whenever discussing a JTM30, folks who own a JTM60 tend to chime in with the assumption that they are similar amps. THEY ARE NOT, AT ALL! They ar not even close to the same! No offfense intended to slide222.

    @ibmorjamn
    I'm curious as to which of these amps you have found? JTM30 or JTM60?

    @Mitchell Pearrow
    So sorry to hear about your son. How old was he? My heart really goes out to you. Children are supposed to bury their parents, NOT the other way around!

    Just My Thoughts,
    Gene
     
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  7. wmachine

    wmachine Well-Known Member

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    Please explain how they are not even close to the same.
     
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  8. Mitchell Pearrow

    Mitchell Pearrow Well-Known Member

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    Jerry was 30 years old
    8/31/77 - 12/15/07
     
  9. ibmorjamn

    ibmorjamn Well-Known Member

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    Mitch , I have no words.
     
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  10. ibmorjamn

    ibmorjamn Well-Known Member

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    @geneballzz JTM30 .
     
  11. Mitchell Pearrow

    Mitchell Pearrow Well-Known Member

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    None are necessary, my son Jarrod was killed in an automobile accident on 2/9/06 he was only 23 they were both very close, and left us very close.
     
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  12. Gene Ballzz

    Gene Ballzz Well-Known Member

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    @Mitchell Pearrow

    So sad to hear. Thank you for honoring us by sharing their names!

    While the cosmetics and "GUI" may seem similar, that's where the similarities end. The schematics tell the real story much better than I ever could. If not versed at deciphering schematics, you'd likely be confused even more by my gibberish.

    Just My $.02,
    Gene
     
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  13. slide222

    slide222 Well-Known Member

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    I thought they were the same design ,60 watt just bigger , aren't the power tubes horizontal also , but I have only seen mine in real life , never seen a 30 watt
     
    Last edited: Dec 27, 2019
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  14. slide222

    slide222 Well-Known Member

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    I haven't found my JTM60 to be a one sounding amp altho you say that the 30 you have is completely different to mine , but on mine , I can go from a mark knofler sound to an ultra gain sound very easy, infact I can get most marshall sounds from it
    it is very versatile- I don't understand what you mean by calling it a one sounding amp and then on your 2nd post you say its the most versatile amp you've had

    I too would like to know how the JTM30 varies ,just out of interest really

    we could do with ampmadscientist's thoughts here , he has lots of knowledge on these amps
     
    Last edited: Dec 27, 2019
  15. jtees4

    jtees4 Active Member

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    I had a JTM-60 1x12 for a couple of years, I bought it well used....I thought it was a great amp. I was concerned about it burning up, and it did have a hum....I decided to get rid of it before It started to have serious problems, as I no longer gig and have been using solid state/modelling amps for home use. It was the best Marshall I ever had since my (60's) Marshall Major which I got around 1976/77 when I was heavily gigging. You know, I really needed the Major for playing all the samll clubs around NYC and area :agreed: (hey....image matters!).
     
  16. wmachine

    wmachine Well-Known Member

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    Common, Gene you (or someone) are going to have to do better than that. Sure they will have different schems. But if there is a "difference that makes a difference" then someone should be able to tell us what difference it makes! (Not just what the difference is)
     
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  17. ibmorjamn

    ibmorjamn Well-Known Member

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    From looking around the web Dr. Tube shows JTM 60 4 ecc83 and 2 el34's
    JTM600, 60W head
    JTMC410, 120W 4x10" cabinet

    This 60W head was introduced in 1996 and used four ECC83's and two EL34 tubes. It offered 2 independent footswitchable channels, each with their own EQ, a spring reverb with dual controls (one for each channel) and a series FX loop and a parallel FX loop.
    The JTM 30 has one less preamp tube and is set up for 5881 power tubes.
    As far as reading the schematic , I can sort of read it but the later models are much more complicated. I don't think I would do a lot of mods to the 30w just because if I want a modern 2204 I will get the studio classic.
     
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  18. slide222

    slide222 Well-Known Member

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    did it say when the 60 was discontinued
     
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  19. Gene Ballzz

    Gene Ballzz Well-Known Member

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    Ad to that the fact that the "diode clipping" was implemented i a very different manner and you have two very different amps. FWIW, I believe the JTM60 was released earlier in the '90s, along with the JTM30, but got it's nomenclature changed to JTM600 at the time the JTM30 was discontinued which corresponds with that 1996 date mentioned by @ibmorjamn .Funny thing is that from a useability standpoint the 60/600 seems like a better amp but both of those were plagued by many problems, but the 30, not so much!

    Just Sayin'
    Gene
     
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  20. ibmorjamn

    ibmorjamn Well-Known Member

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    @geneballzz , got the amp it has Issues . Thread :
    http://www.marshallforum.com/threads/new-amp-day.110892/#post-1906459
     

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