Hi all,
I have the above mentioned amp for repair. Some gate resistors are 47.5 and some are 60.4ohms. Dont know if anybody interfered with them. I would like to the values of the gate resistors. They used 75344G mosfets. Thank you
I have the above mentioned amp for repair. Some gate resistors are 47.5 and some are 60.4ohms. Dont know if anybody interfered with them. I would like to the values of the gate resistors. They used 75344G mosfets. Thank you
The bank heating has only one 47.5ohms rest are 60.4.
R26 is 47.5a.
Other bank has two 47.5ohms rest is 60.4.
R1007 AND R1009 are 47.5.
R26 is 47.5a.
Other bank has two 47.5ohms rest is 60.4.
R1007 AND R1009 are 47.5.
I corrected the resistors. It is still pulling current and the bank with 60.4 heats up. Banks with 47.5ohms are cooler.
Are you saying that 9 FETs are heating and 3 FETs are remaining cool?
Or are you saying that both banks in the power supply with three 47.5 ohm gate resistors in one bank are running cool?
Or are you saying that both banks in the power supply with three 47.5 ohm gate resistors in one bank are running cool?
The bank with 47.5ohms all the 6 mosfets remaining cool.
The other bank with 60.4 all the 6 mosfets getting hot.
The other bank with 60.4 all the 6 mosfets getting hot.
Is the heating precisely the same as when it had all 60.4 ohm resistors?
Is the current draw precisely the same?
Was there any improvement when the gate resistors were changed from 60.4 to 47.5 ohms?
Is the current draw precisely the same?
Was there any improvement when the gate resistors were changed from 60.4 to 47.5 ohms?
Post images of the waveforms on the gate legs of one FET from each bank of FETs that are heating up.
The pulse on the falling side of the waveform is excessive.
What FETs are you using?
Do you see the same sort of pulse on the other power supply FET gates?
What FETs are you using?
Do you see the same sort of pulse on the other power supply FET gates?
