I'm restoring an old tube radio. When looking into the schematics I noticed that they drew 2 resistors in parallel instead of 1 resistor, between the power transformer and the rectifier tube. Is there any benefit from installing 2 parallel resistors instead one resistor?
Answer
Two resistors have an increased ability to dissipate power/heat, up to twice the time one can, when mounted with enough space between them.
Also for a few applications it is easier to find two standard value resistors that together form one resistor value that is not among the standards you already have in your BOM (or are available).
Lastly for the gray beard hand chosen value resistor, it might have a higher yield to use two that are slightly off than to find the one that matches perfectly.
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