I Build an Aleph 3 few days ago, without matching that MOSFET (IRFP240). The voltage across SOURCE RESISTOR (3W, 2%) is little difference between them. So I try Matching & Group them under 100mV range, but this time I use IRFP250 & 3 pair of them. I also see some of them are very difference. 0.1 / 0.2 / 0.3 voltage amount them.
How this happen after matching up?
And this time the sounding is better then last time. If it is because I matching the differential pair of IRF9620 or just IRFP250 is better then IRFP240?
P.S. I use +/-45V DC on Power rail.
How this happen after matching up?
And this time the sounding is better then last time. If it is because I matching the differential pair of IRF9620 or just IRFP250 is better then IRFP240?
P.S. I use +/-45V DC on Power rail.