NMOS350 / 500
This amplifier was created from my ideas and also from the ideas by members of DIY Audio. It intended as a high quality and powerful amplifier for domestic use.
| pdf's | schematic | layout & tracks | |
| sprint layout files | Nmos350 with DC detect | Nmos500 with DC detect | |
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Power selection guide.
This table should be used as a power configuration guide. Powers shown are approximate and probably maximum depending on the size and quality of the power supply.
| rail volts (+/-) | R6 | Pwr 8 ohms |
IRFP450(s) req. |
Fast Blow Fuse - Amps |
Pwr 4 ohms | IRFP450s req. |
Fast Blow Fuse - Amps |
Pwr 2 ohms | IRFP450(s) req. |
Fast Blow Fuse - Amps |
| 40 | 6K8 | 65 | 2 | 2.50 | 120 | 2 | 5.00 | 230 | 4 | 10.00 |
| 45 | 6K8 | 85 | 2 | 2.75 | 160 | 4 | 5.50 | 310 | 6 | 11.25 |
| 50 | 6K8 | 110 | 2 | 3.00 | 210 | 4 | 6.25 | 400 | 6 | 12.50 |
| 55 | 6K8 | 135 | 2 | 3.25 | 260 | 4 | 6.75 | 500 | 8 | 13.75 |
| 60 | 18K0 | 165 | 2 | 3.75 | 315 | 4 | 7.50 | 600 | 8 | 15.00 |
| 65 | 18K0 | 195 | 4 | 4.00 | 380 | 6 | 8.00 | 730 | 10 | 16.25 |
| 70 | 18K0 | 230 | 4 | 4.25 | 440 | 6 | 8.75 | NO | NO | NO |
| 75 | 18K0 | 270 | 4 | 4.50 | 520 | 8 | 9.25 | NO | NO | NO |
| 80 | 18K0 | 310 | 4 | 5.00 | 600 | 8 | 10.00 | NO | NO | NO |
| 85 | 18K0 | 350 | 6 | 5.25 | 680 | 10 | 10.50 | NO | NO | NO |