The BBC557 transistor is extremely close to the 2N3906. The 2N3906 is distinguished by its high collector to emitter voltage (VCE). Furthermore, because the part's gain value is only 300, it is incompatible with high-power amplifier application circuits.is this correct?
I recommend posting your request in a better matching Forum, i.e.:
https://www.electro-tech-online.com/threads/bc557-pnp-transistor-problem.130990/
thanks very much