the bd139 has different qualities than mje340
bd139 can take higher power than mje340
but i think you should stick with bd139
the ft of device might be critical or even the power
the power follower uses the bd139 to control Iq
so it shouldn't be too critical on the device chosed
bd139 is cheaper than the others
email the guy to confirm the choice
bd139 can take higher power than mje340
but i think you should stick with bd139
the ft of device might be critical or even the power
the power follower uses the bd139 to control Iq
so it shouldn't be too critical on the device chosed
bd139 is cheaper than the others
email the guy to confirm the choice
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