Hallo ! Am working with this bassamp and it´s not easy for a "tubeampguy" like me...... haven´t been soldering transistors
much since the 60-ties ! Wonder if its important to select matched powertransistors and /or drivertransistors ? And , can for example the drivertransistors have been damaged even if they is OK when controlled with an ohmmeter ? Will a hfe
test tell more about their condition ? About ten or so transistors on this board is the type "surfacemonted" . I must say , I don´t like them !!!! Can I change at least some of them to TO92 types with the same data but higher voltagecapacity ? For example : BC 847B to BC 546B , and BC 857B to BC 556B ? I have ordered some books to
learn more about solid state amps but not sure they will answer my questions so I´m happy if you can give some advice.
Regards Stewen
much since the 60-ties ! Wonder if its important to select matched powertransistors and /or drivertransistors ? And , can for example the drivertransistors have been damaged even if they is OK when controlled with an ohmmeter ? Will a hfe
test tell more about their condition ? About ten or so transistors on this board is the type "surfacemonted" . I must say , I don´t like them !!!! Can I change at least some of them to TO92 types with the same data but higher voltagecapacity ? For example : BC 847B to BC 546B , and BC 857B to BC 556B ? I have ordered some books to
learn more about solid state amps but not sure they will answer my questions so I´m happy if you can give some advice.
Regards Stewen