Quote:
Originally Posted by CarlQB
OK thanks. I figured it must be there mostly for noise reduction. It was suggested to me (on another forum where I asked) that such a resistor was rather unusual, and while its presence might have something to do with noise reduction, with an unpolarized plug its got more chances creating a dangerous situation of having line voltage on the chassis, and I probably should remove this resistor and make the 6V power supply completely independent from the mains.
Since I'll be working on this radio I think I'll just take the resistor off the board for now, see if it affects the radio in any way, I can always solder it back if needed.
Thanks!
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In part, yes, if the resistor voltage rating is less than the maximum voltage breakdown of the PS trafo. If is a common resistor, for sure will survive less spikes than the trafo. But, if is a HV resistor, will survive far more than the trafo, and trafo shortens first (to the secondary).
+1 for the static charge draining cited by jr-tech.