You do not show the part number for the transistor for us to look at its datasheet. If it is a 2N3904 transistor then its saturated base voltage at a collector current of 10mA is somewhere in the range of 0.65V to 0.85V. There is a range because they cannot make transistors all the same, some have a higher base voltage than others and the temperature also affects the voltage.
You do not show the part number for the transistor for us to look at its datasheet. If it is a 2N3904 transistor then its saturated base voltage at a collector current of 10mA is somewhere in the range of 0.65V to 0.85V. There is a range because they cannot make transistors all the same, some have a higher base voltage than others and the temperature also affects the voltage.
Some parts of Canada are very cold and transistors and people do not live there. I am in the southern party of Canada where there are some parts of USA north of me. The Great lakes near me keep the temperature moderate, maybe -10 degrees C is a very cold winter day. My 2N3904 transistors have maybe 10V and maybe 20mA so are nice and warm dissipating 200mW.