Is there a BD139 equivalent which has a faster slew rate? ...

Tweakers' Asylum

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A mate of mine who designs amplifiers for a living, designed an emitter-follower regulated PS 10 years ago, which I have been using to power my active XOs and my phono stage.

I was talking to someone recently (who may or may not know what he is talking about! :-)) ) who said the BD139 is an old design and I should instead use a more modern transistor which has a "faster slew rate".

So, can anyone advise me which transistor would meet this criterion (and be able to output a few hundred milliamps)?

Thanks,

Andy

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Topic - Is there a BD139 equivalent which has a faster slew rate? ... - andyr 20:05:00 07/06/14 (10)

40 Mhz - djk 00:11:41 07/08/14 (2)

RE: 40 Mhz - andyr 01:16:42 07/08/14 (1)

RE: 40 Mhz - analog_sa 00:28:20 07/09/14 (0)

RE: Is there a BD139 equivalent which has a faster slew rate? ... - beautox 15:34:05 07/07/14 (3)

Very good point, beautox. ... - andyr 16:15:16 07/07/14 (2)

RE: Very good point, beautox. ... - beautox 16:30:08 07/07/14 (1)

All true - thanks. :-)) nt - andyr 16:40:24 07/07/14 (0)

Have you asked your mate? - 1973shovel 09:14:35 07/07/14 (2)

Yeah, good point, 1973. ... - andyr 13:30:15 07/07/14 (1)

RE: "how much should you use? :-))".. - 1973shovel 03:49:52 07/10/14 (0)

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