collapse

Author Topic: MPSU07 & MPSU57 alternatives?  (Read 3859 times)

AllThorUp

  • SSGuitar Apprentice
  • **
  • Posts: 5
  • Chip Points: 0
    • View Profile
MPSU07 & MPSU57 alternatives?
« on: September 03, 2016, 08:49:01 AM »
Anybody able to point me towards some alternative replacement driver transistors for this pair? (MPSU07 & MPSU57) Those 2 are a little pricey, and apparently arent made anymore, so i was hoping to find an alternative that was a bit more cost effective. Thank you, I appreciate it very much.

nickb

  • Chipper
  • *
  • Posts: 3
  • Chip Points: 0
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #1 on: September 04, 2016, 11:29:15 AM »
Well I'm not ignoring you but I don't have an answer either.  I haven't come up with anything suitable in a compatible package, or even a SM package for that matter. Can you relax the specs e.g do you really need 10W @ Tc=25C?

 

Vitrolin

  • Master SSGuitarist
  • ****
  • Posts: 63
  • Chip Points: 3
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #2 on: September 04, 2016, 01:57:06 PM »
where are you going to use them?
without that information it will be hard to find a substitute..

Enzo

  • Legendary
  • ******
  • Posts: 1842
  • Chip Points: 189
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #3 on: September 04, 2016, 03:49:51 PM »
Any reason a TIP31C and TIP32C wouldn't work?  The legs are in different order, so you turn the part sideways and bend the legs to suit the holes.   

I might also try MJE243 and MJE253, again, the legs are in different order, but that should not be a problem.

Enzo

  • Legendary
  • ******
  • Posts: 1842
  • Chip Points: 189
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #4 on: September 04, 2016, 09:30:14 PM »
OK, where are you located?  And how many do you need?

I just did inventory on my transistor stock, and the "case 152" series I have a few.

I have ONE MPSU57 equivalent in the Motorola HEP series NOS.

I have TWO MPSU07 NOS, and one equivalent NSDU07 also NOS.

If those few will help you, I will let them go cheap.

And the others I have with amounts:
MPSU06 - 17
MPSU10 - 7
MPSU45 - 3
MPSU60 - 2

Those are not rally related to the 07/57 pair, but I have no idea what you are working on.

DrGonz78

  • Legendary
  • ******
  • Posts: 549
  • Chip Points: 67
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #5 on: September 05, 2016, 12:39:42 AM »
where are you going to use them?
without that information it will be hard to find a substitute..

Lets play the guessing game??? Polytone??  :duh :duh
“A person who never made a mistake never tried anything new.” -Albert Einstein

J M Fahey

  • SSGuitar Global Mod
  • Legendary
  • ****
  • Posts: 4141
  • Chip Points: 429
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #6 on: September 05, 2016, 08:04:32 AM »
IF they are to be used in a Polytone, most any transistor same case and standing some 80Vce will be fine, because 2X rail voltage does not reach that.
Meaning many of Enzo´s will work fine, just doublecheck datasheets.

Wouldn´t trust EBay purchases.

AllThorUp

  • SSGuitar Apprentice
  • **
  • Posts: 5
  • Chip Points: 0
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #7 on: September 09, 2016, 02:05:55 AM »
I am repairing a pignose 30/60, i have replaced the output transistors and next on my list is to replace the drivers. Sorry it took a little while to reply, ive been away from home.

AllThorUp

  • SSGuitar Apprentice
  • **
  • Posts: 5
  • Chip Points: 0
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #8 on: September 09, 2016, 02:09:31 AM »
Enzo, I am located in california, and unless i mess something up (fingers crossed) i only should need 1 pair..  thanks for the offer, i would be extremely pleased if you would sell them to me for a good price!

Enzo

  • Legendary
  • ******
  • Posts: 1842
  • Chip Points: 189
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #9 on: September 13, 2016, 09:17:48 PM »
Then if you haven't already, send me a PM about this.

Enzo

  • Legendary
  • ******
  • Posts: 1842
  • Chip Points: 189
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #10 on: October 02, 2016, 01:25:03 AM »
I was laid up for a couple days, but I did get your parts mailed out Friday.  You should see them soon.

AllThorUp

  • SSGuitar Apprentice
  • **
  • Posts: 5
  • Chip Points: 0
    • View Profile
Re: MPSU07 & MPSU57 alternatives?
« Reply #11 on: October 03, 2016, 04:42:23 AM »
Thanks, Enzo. I really appreciate it!

 

* User Controls

 
 
Welcome, Guest. Please login or register.
Did you miss your activation email?

* Recent Posts

Gallien Krueger 800RB by phatt
[Today at 02:22:45 AM]


Kay 708 amp repair by Jazz P Bass
[August 19, 2019, 08:30:07 PM]


National GA920P Schematic by mwdavis
[August 19, 2019, 06:55:01 PM]


Pearce A3 schematic by epeirce
[August 19, 2019, 10:16:50 AM]


FENDER MONTREUX by jman
[August 17, 2019, 10:19:25 PM]

* Sponsors