27-11-2014, 01:01 AM
Where did I claim the resistor was a safety component? 
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I advocate changing the resistor because the carbon film original will fail prematurely.
I advocate changing the capacitor for an X2 type for obvious safety reasons.
I advocate adding a fuse, for obvious safety reasons. I highlighted that point in red on the webpage.
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Obviously, an appropriate fuse removes any concerns about the possibility of a carbon-comp resistor failing S/C. The fuse also gives protection from the horrors of the PCB layout.
No properly designed product would rely on an inrush-limiting resistor to also act as a fuse. You need a separate fuse.
Incidentally, I just noticed that I omitted to label the capacitor on the schematic. I've just corrected that. In case it's not 100% clear to anyone else reading this, we're discussing R7 and C4.
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I advocate changing the resistor because the carbon film original will fail prematurely.
I advocate changing the capacitor for an X2 type for obvious safety reasons.
I advocate adding a fuse, for obvious safety reasons. I highlighted that point in red on the webpage.
----------------------------------------------------------------------------------------------
Obviously, an appropriate fuse removes any concerns about the possibility of a carbon-comp resistor failing S/C. The fuse also gives protection from the horrors of the PCB layout.
No properly designed product would rely on an inrush-limiting resistor to also act as a fuse. You need a separate fuse.
Incidentally, I just noticed that I omitted to label the capacitor on the schematic. I've just corrected that. In case it's not 100% clear to anyone else reading this, we're discussing R7 and C4.
