Marantz P400, P700 is almost identical,
3 stage direct coupled NPN with feedback city,
getting about 31 db stock, changed last transistor to 2N5088 (from 2SC1775a) and got it up to 34 db,
4 mv in, about 216 mv out,
vol knob has to go hi compared to CD ,
40 db would be nice, don't want to screw up the RIAA,
thanks for any help!
circuit with DC volts>
3 stage direct coupled NPN with feedback city,
getting about 31 db stock, changed last transistor to 2N5088 (from 2SC1775a) and got it up to 34 db,
4 mv in, about 216 mv out,
vol knob has to go hi compared to CD ,
40 db would be nice, don't want to screw up the RIAA,
thanks for any help!
circuit with DC volts>