They are likely OK. You will need to replace the drivers and any out of tolerance gate resistors for the FETs. Q8 appears to have an open gate resistor. You will have to measure the rest. Set the meter to 200 ohms range.
Ok that's what I though, I was hoping they weren't that small. I'm not sure how to remove them. I'll test them all. Thanks
This amplifier is 1 of 2. I purchased two of them for 20 bucks from someone. I am grateful for your help. I will read that for sure. Thanks
i did read somewhere the ps fets i used were the 3205, so should i go with the same 10R smd resistors.?
Last edited:
I always use 47 ohm gate resistors with 3205 in this amp. The package size of the gate resistor is 0805
Ok so I can't seem to find 47 ohm here, I'll haft to order them, is it usable with the 100 ohm and 3205?
I think they are 10 just say 100 on them, just wondering for testing purpose, I have ordered the 47 ohm. But have the 10, I'll switch them all out to the 47 before use.
Right and I have 10R here. Which are the same? So what does the 47ohm do vrs the 10 with the 3205..?
10R is 10 ohms.
You will see no difference between 10 and 47 ohm. Typically, when someone goes from a lesser FET (that likely uses a 100 ohm gate resistor) to the 3205, they replace the 100 ohm gate resistors with 47 ohm resistors. The 100 ohm would cause overheating of the 3205s.
You will see no difference between 10 and 47 ohm. Typically, when someone goes from a lesser FET (that likely uses a 100 ohm gate resistor) to the 3205, they replace the 100 ohm gate resistors with 47 ohm resistors. The 100 ohm would cause overheating of the 3205s.
Oh ok I see, I figured it was something like that with the higher resistance. So for testing the 10 will be ok? And is it ok to try and power one up now?
I've only been dealing with the one with you. The othe one is only just waiting till after this one. I replaced the drivers and the gate resistors. Should I test the voltage on the FETs again with only ground and remote?
- Status
- Not open for further replies.