THE BIPOLAR TRANSISTOR COOKBOOK, Parts 1 – 8
This is a tremendous resource for those  needing to understand
bipolar transistor theory and use.
PART 1
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_1
PART 2
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_2
PART 3
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_3
PART 4
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_4
PART 5
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_5
PART 6
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_6
PART 7
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_7
PART 8
https://www.nutsvolts.com/magazine/article/bipolar_transistor_cookbook_part_8