I use 18ga solid for 99% of my wiring, mainly because it stays in place and I only have to stock one ga of wire. I've used 14ga solid for something like the ground from the output tube cathodes on a 300B amp to the star ground point, and 22ga stranded to power the LED on a power switch.
I use 18ga solid for 99% of my wiring, mainly because it stays in place and I only have to stock one ga of wire. I've used 14ga solid for something like the ground from the output tube cathodes on a 300B amp to the star ground point, and 22ga stranded to power the LED on a power switch.