Philips AH578 Lateral-MOSFET Adaptation

January 2021
StatusCompleted
Circuit familyPhilips / lateral MOSFET
Photographs28 full-size gallery images
Downloads1 local design and reference files

Project Notes

A modern adaptation of the Earl Rapp / Philips circuit using an op-amp input and lateral MOSFET outputs, built in an aluminum chassis with repurposed server heatsinks.

diyAudio discussion

Photo Gallery

philips22ah578.hexfet.5khz rsq rise
1. philips22ah578.hexfet.5khz rsq rise 		philips22ah578.hexfet.1khz thd
2. philips22ah578.hexfet.1khz thd 		DSCN0526
3. DSCN0526 		DSCN0531
4. DSCN0531
DSCN0537
5. DSCN0537 		DSCN0539
6. DSCN0539 		DSCN0540
7. DSCN0540 		philips22ah578
8. philips22ah578
philips22ah578.hexfet.10khz fft
9. philips22ah578.hexfet.10khz fft 		sinus 100khz
10. sinus 100khz 		DSCN0494
11. DSCN0494 		sinus 34khz
12. sinus 34khz
DSCN0518
13. DSCN0518 		DSCN0496
14. DSCN0496 		DSCN0523
15. DSCN0523 		DSCN0500
16. DSCN0500
DSCN0522
17. DSCN0522 		DSCN0521
18. DSCN0521 		DSCN0520
19. DSCN0520 		DSCN0519
20. DSCN0519
DSCN0517
21. DSCN0517 		DSCN0516
22. DSCN0516 		DSCN0515
23. DSCN0515 		DSCN0514
24. DSCN0514
DSCN0513
25. DSCN0513 		DSCN0512
26. DSCN0512 		DSCN0510
27. DSCN0510 		DSCN0509
28. DSCN0509

Design Files and Documents

LTspice simulations

FileSize
philips22ah578.asc 10 KB
<< LMK Baby BeastHOMEWiederhold 1977 Quasi 2N3055 >>