Received this amp with a blown PS section. Removed all IRFZ48V and replaced with STP80NF06.
Rectifiers removed, because some of them short.
Everything else looks ok.
Without recitfiers it pulls high current.
But it seems, that the Fets are not driven good.
Gate resistors are original 328Ohm,
there are no pull down resistors.
I have on each bank a 10 Ohm resistor at the source, with a cap connected to drain.
Rectifiers removed, because some of them short.
Everything else looks ok.
Without recitfiers it pulls high current.
But it seems, that the Fets are not driven good.
Gate resistors are original 328Ohm,
there are no pull down resistors.
I have on each bank a 10 Ohm resistor at the source, with a cap connected to drain.
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Did you change the driver transistors near the 494?
I've never seen an amp with 328 ohm gate resistors, was that a typo?
I've never seen an amp with 328 ohm gate resistors, was that a typo?
Are you sure that the gate resistors are 328 ohms? That would be a 1% part. The ones in the photo appear to be 5%.
