2SA872 & 2SC1775 transistor replacement
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2SA872 & 2SC1775 transistor replacement

I decided to rebuild my Hiraga Class A amplifier . I want to use flat package power transistors
So I took the PC board layout posted on the Hiraga Class A post . I made my PC board , today I started to populate one .
I just realized who ever design these PC board he didn't design for the original 2SA872 & 2SC1755 .
Even do I have the original transistors I have to replace it because the PC board was design different pin out transistors .
My question can I replace the 2SA872 & 2SC1755 with BC550C & BC560C
or may be 2N5401 & 2N5551 ..These two I have at hand and the pin out match with the PC board layout .
Any help , advise welcome .
If someone tried any different transistors in place 2SA872 & 2SC1755 please let me know .
I will use 24V rail voltage
Thank you very much .

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