I have built Aleph 5 before 6 months and it works fine. But i notice that one heatsink heats a litle bit more than the other so I measure voltage accros source resistors and all vlotages are around 0.6 and 0.65V but on one source res. is 0.8 V. So what could be the problem mosfet Off-toleranc of source resistor or something else?
Sorry obout my bad english.
Sorry obout my bad english.
That would indicate a resistance value about 33% off. Unlikely, but possible. You can actually measure this in-circuit.
Indeed, a FET which has it's channel "opened wider" (!?) due to unmatched gate characteristics is much more likely, as just a little deviation from the rest of it's bank would make this FET conduct more of the total current than each of the other FETs in this bank. We're talking 33% here...
Cheers.
Indeed, a FET which has it's channel "opened wider" (!?) due to unmatched gate characteristics is much more likely, as just a little deviation from the rest of it's bank would make this FET conduct more of the total current than each of the other FETs in this bank. We're talking 33% here...
Cheers.
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