Prescaler diagnostic measurements on prototype 3/20/2018 WB9KZY made using a DT-830D inexpensive DVM (like the red Harbor Freight DVM) Resistance measurements, made with power OFF, black lead to grounded mounting hole on 200k ohm range MC12080 pin number resistance in k ohms 1 open (infinite) 2 4.3 3 4.3 4 0.8 5 0 6 4.3 7 4.3 8 open (infinite) Voltage measurements, power ON, black lead to grounded mounting hole, 20 Volt range MC12080 pin number voltage in volts 1 2.73 2 4.98 3 4.98 4 3.37 5 0 6 4.98 7 4.98 8 2.73