big muff transistor hfe's

[km-r]

i find it difficult to acuire mpsa13's in our location.
will two transistors at 100hfe connected in a darlington pair be a valid substitute?

somewhere around 10000hfe i guess.

[Meanderthal]

300 to 900 hfe is more like the right neighborhood... Darlingtons might be overkill...

[Dragonfly]

other good possibilities...

2N5088
2N5089
TIS97
BC109C

You should be able to find one or all of those fairly easily.

AC

[Shepherd]

i find it difficult to acuire mpsa13's in our location.

who recommends MPSA13's in the BMP?

[petemoore]

  Someone could elaborate, the ones that are socketted !
  ...or transistors of the HG/LN varieties, like 2n5088's/MPSA18's, goodstock.
  There are a number of things controlling gain in the BMP, higher/lower gain transistors sound different in it.
  BCxxx transistors have a..BCxxx sound, same for GE sounding GE like.
  See "Yun's Big Muff mods" maybe you'll like a BMP using lower gain transistors with another boost stage...lol.