Will jury-rig with a couple of IRF740 in there at 70 percent mains to check
if the supervisor is working.
Can "totem pole" types be used as dual drive? A TDA8130 would go in there
pinning-wise, with 6 of the 8 pins rewired, no idea if correct operational
parameters though. Before trying a pair of 20 amp/600V powerFETs.
Is there any point in roughing the surface of a flat shiney aluminium block
heatsink or painting black for better heat transfer, not really space to add
vanes to the block