Hi Gang. Simon, Yes, the Bendex 6106 takes about twice the time of any other indirect rectifiers to power up. It also requires a way more run in time than any of the others to sound it's best. Regarding the Gz37, I completely agree with Fiddler here 100%. It's just not the rectifier for the Supratek and he has described it's sound in the supratek to a T. Mind you... Your reference to a Phillips Mini-watt gz37, which I have never tried and wasn't even aware that Phillips made one. My experience was with the nos Gz-37 made by Mullard and I am not much of a fan. In my rig, the bendex is the winner in both the syrah and the cortese with the metal base gz34 a very close second.