For the Heatsink i posted a picture here : https://www.diyaudio.com/forums/solid-state/255427-simple-quasi-complimentary-mosfet-amplifier-249.html#post6738650
They mesure 230x195x40mm with a base of 10mm thickness.
I plane a monobloc configuration with 2 independant chassis made MDF that i will paint in glossy white. One mono bloc will mesure 240x240mm front and 260mm deep. Each heatsink will take place in the middle of the case and will shown only is uper face. I think i will begin case building this weekend
Marc
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IRF4668
Hi Andrew,
This is a 520W 200V 130A hexfet with a Ciss of 10.7nF.
In this role it's too much, the gate drive is too heavy.
I would suggest a mosfets with around 280W 150V 40A.
This would have a Ciss of around half, easier to drive.
It would work, but be limited for slew and HF.
Hugh
Hi Andrew,
This is a 520W 200V 130A hexfet with a Ciss of 10.7nF.
In this role it's too much, the gate drive is too heavy.
I would suggest a mosfets with around 280W 150V 40A.
This would have a Ciss of around half, easier to drive.
It would work, but be limited for slew and HF.
Hugh
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Wonderful news, Andrew!
The quasi is a very strange beast with its npn bipolar and nmos output stage. It looks quite weird, but it works very well and offers quite a bit of second harmonic which many really like - like a tube.
This was a wonderful thread too, with five of the pcbs offered. My favourites were Phunk's organic pcb, and Thiago's integrated amp with independent power supplies. A terrific amp project indeed.......
Ciao,
Hugh
The quasi is a very strange beast with its npn bipolar and nmos output stage. It looks quite weird, but it works very well and offers quite a bit of second harmonic which many really like - like a tube.
This was a wonderful thread too, with five of the pcbs offered. My favourites were Phunk's organic pcb, and Thiago's integrated amp with independent power supplies. A terrific amp project indeed.......
Ciao,
Hugh
