Hello everyone. Hope you all are doing well 
I need some smart input from you... I am looking for some replacement transistors for my old tape recorder. The recorder sounds like a thunderstorm, so I think one transistor is bad. Since those transistors (BC330C, BC237B, BC238B) not are available anymore, I am looking for replacements.
In this case, since the design already is given, is "typical hfe" the parameter witch is most important to match with the original transistor? - To keep the same amplification steps.
All maximum-voltages must of course to be the same or higher to the original.
I have some BC550C with hfe=420-800. Is it correct to think that the typical hfe for the BC550C is in the middle of this values =610 ? Too much amplification in my case?
Any input is appreciated 
Christian
