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Looking for a datasheet on transistors NEC 2SD388A and NEC 2SB541A

I am unable to find a datasheet for the transistors NEC 2SD388A and NEC 2SB541A. I have found some transistors that will work for them as per an audio thread from a couple of years ago but I have no idea which of these old transistors is a PNP or NPN so I can replace them correctly. Any ideas? I am fairly new to vintage audio but I have some general knowledge of electronics.



Re: Looking for a datasheet on transistors NEC 2SD388A and ...

2SA and B will always be PNP and 2SC and D will always be NPN.

Re: Looking for a datasheet on transistors NEC 2SD388A and ...

you are right Johnnysan,

I would add:
2SA, 2SC high frequency
2SB, 2SD low frequency

Re: Looking for a datasheet on transistors NEC 2SD388A and ...

The data for these transistors are
Data

2SB541A: Si PNP 110V 8A 80W 9Mhz (2SB681)
2SD388A: Si NPN 150V 8A 80W 9Mhz (2SD551)

Much better is 2N5631 & 2N6031 or the very Best BD705 &BD751 from RCA