High voltage wrecked my old school amps

[Datsun510]

Originally posted by Perry Babin


I'd suggest replacing all of the power supply transistors if even one has failed (other than the power control transistor). It's imperative that all that are running in parallel be matched. Both sets of transistors were subjected to the same conditions. If they didn't fail, they were likely pushed to the edge and may be weakened. The parts are less than $1 each.

Thank you again for the great info.

When you say both _sets_of transistors were possibly damaged, does that mean that there are 6 more on the opposite side of the board?

Also, would I be smart to buy enough transistors to replace all of them on both amps?

Here are a few pics of the MS250. I always thought this one was very pretty inside