I have been as yet unable to answer the following questions regarding the N52t power supply. Questions are referenced to schematic N52t-930-00. -What was/is the voltage across the filament windings on the Bv.2/Bv.2a power transformer? Inspection leads me to believe 160V, but I'm hoping to verify. -The labeling of the silicon diode at Gr.1 is unclear to me, as the value 1.2 is clearly too low of a voltage and quite high for an amperage tolerance with respect to the circuit. Would 1n4007 be a suitable replacement? Thank you for your assistance.