Hi mr mile i built ur ax14 but i have a 7volts dc offset. Ive used c3281 and a1302 the drivers are c2073 amd a940. Previously.ive used kse350 n kse340 replaced it with mse still same dc.offset. i also rrplaced q1,q2 n q3 still same dc offset. Please help. Thanks
try to probe the correct pins of your transistors. pins should match the pcb layout. i experienced this dc offset when my transistor has different pins specs than the pcb layout.
goodluck.
I already tried rotating 180 the mses. I also checked that the transistors match pcb layout.
I'll check it again. Thanks
if there is fault on the circuit, some transistors can be destroyed during testing without the evidence of physical burns. remove them from board and test it again with multimeter.
I made some small changes to ax11 amp - as sansui au217 amplifier (preaty same amp) and have smmall question - can the input buffer be bypassed and input pair be substituted with 2sk170 tranies ?
I have made some simulations and amp is preatty quick and looks stable.
The square is 20kHz
THX
I have made some simulations and amp is preatty quick and looks stable.
The square is 20kHz
THX
Attachments
can i have the voltages measurement of ax-11? my ax 11 have a 5v in amp out without the output transistor.
usually this happens when signal ground is not connected to PSU ground.
normal reading of DC offset should be lower than +/-50 millivolts.
edit: output trans must be installed.
Hi already replaced all the bcs and 5401 transistor but still have 7volts dc offset. Pls help