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PT & OT compatibility question

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  • PT & OT compatibility question

    i have a PT with the codes 125p7d - 606342 (fender bassman ?) and an OT from a musicman hd130 w/tube PI .
    anybody know to what extent are these compatible ?

  • #2
    Did googling turn up a datasheet of any sort? I haven't had much luck in that regard, but it's worth a shot.

    The PT should be pretty easy to characterize. Just hook it up to AC (carefully, and may be a good idea to put a fuse on it first) and see what comes out.

    The OT you can characterize with a little more work. There is a post in the theory section on that right now I think.
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    • #3
      Originally posted by zhyla View Post
      Did googling turn up a datasheet of any sort? I haven't had much luck in that regard, but it's worth a shot.

      The PT should be pretty easy to characterize. Just hook it up to AC (carefully, and may be a good idea to put a fuse on it first) and see what comes out.

      The OT you can characterize with a little more work. There is a post in the theory section on that right now I think.
      thanks for taking the time !

      i did find some info online but it was conflicting , as far as the PT specs go .

      ive got a little setup i made to test PTs , thats my next step .

      im familiar with the musicman OTs , knowing that they did ran around 65W on low power , and the PT is for about 40W , i was wonder what difference in headroom that would produce . i figure i could run 4 EL84s and a 12AX7 PI .

      my reasoning behind this is : i found a musicman 210 hd130 w/ tube PI in the trash about 10+ yrs ago . here recently started messing with it , and found that it didnt have the orignial PT in it (had the 125P7D instead) and the bias was no longer on the preamp board , and some other oddities (someone did a real crappy fix/mod and fecked it up) .

      so , my goal is to make a pseudo musicman ex hd130 thing . im gonna run the preamp on 9v , stick a 6M resister where the reverb springs should be , 12AX7 PI , and a tube poweramp section (EL84s? instead of EL34s) .

      anyway , i hope i hadnt posted this in the wrong section .
      thank you for the response !

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