Registry
These should be off the shelf parts. Please contact me if any of them are wrong or if you have any other suggestions. All of these parts can be procured from digikey.com or Mouser.com. Please use these at your own risk, I am simply supplying the info, I offer no guarantee that these will resolve your issue or that the amp will not completely blow up.
Orignal part # Repl. part # upgrade part # category Amp Models Notes
IRFZ44 IRFZ44 IRFZ48 MOSFET ZPA, ZX, M IRFZ44 uses 33 ohm resistors, IRFZ48 uses 330 ohms
IRFP044 IRFP044 IRFP064 MOSFET MS, MPS, MAC Both use the same value gate resistors
2SA1302 2SA1943 PNP output MS, MPS, MAC straight replacement
2SC3281 2SC5200 NPN output MS, MPS, MAC straight replacement
HS216-ND HS216-ND heatsink M, MS, ZX, ZPA pre-driver heatsink
7002 NJU7002D LME4972 opamp M, MS, ZX upgrade opamp is by texas instruments
7002 NJU7002D OPA2134PA opamp M, MS, ZX upgrade opamp is by texas instruments
BER182-ND BER182-ND thermal M, MS Thermal pad, smaller size, TO-220
BER178-ND BER178-ND thermal M, MS Thermal pad, larger size, TO-247
thermal paste 532-251 thermal M, MS, ZX, ZPA Thermalcote I part no. 251 G
capacitor UHE1C562MHD6 UHE1C822MHD capacitor M, MS, ZX, ZPA nichicon black with silver stripe, 10k operating hrs
capacitor EEU-FC1C562L EEU-FC1C822 capacitor M, MS, ZX, ZPA Panasonic navy blue with gold stripe, 5k operating hrs
Replacement parts