Quote:
Originally Posted by Oldelectronics
Thanks David would you go for 20 or 22 AWG?
Kev
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The calculator here will tell you what guage to use.
https://www.calculator.net/voltage-drop-calculator.html
Essentially 22awg is suitable for most settings in radios as the current is very small, but you can see that for currents of 2 or 3A, you will get an appreciable voltage drop over increasing lengths (5% for 1m). This could be problematic (heat + incorrect voltage at valve) so you're better off using 18awg for heater filaments, unless you only need it to bridge a really short gap (<10cm)
Gabriel