Introduction to Electronics for Beginners - PCB | Fusion 360 Blog
resistance - Why would you put multiple resistors in line vs one resistor of the same value? - Electrical Engineering Stack Exchange
A piece of PCB for paralleling two TO-3 transistors with 100 mΩ ballast resistors made of PCB traces and also there's room for a base emitter resistor, bought from a salvage store. :
Amazon.com: Treedix 2PCS Multifunctional PCB Ruler 3inch Measuring Tool Color Wavelength, Schottky Diode, Zener Diode Resistor Capacitor Chip IC SMD Diode Transistor for Electronic Engineers Printed Circuit Board : Tools & Home
Resistors, Diodes, and Transistors: Part 2 PCB and Components
July Memor PCB Ruler Resistor Capacitor Chip IC SMD Transistor Measuring Tool (15cm) | Walmart Canada
Designers must follow guidelines for resistor aging - EDN