Hi!
Check my QSXPS power supply. The large 4700µF caps gets noticable warm. Why? Is it stressing to have this kind of R-C filter? Obviously, but why?
The 470µF don't get warmed up.
Check my QSXPS power supply. The large 4700µF caps gets noticable warm. Why? Is it stressing to have this kind of R-C filter? Obviously, but why?
The 470µF don't get warmed up.
Not that it means anything but I can see no reason why they should be warmer than any other cap in a low power supply. To me it seems that there is something wrong with the cap...
/UrSv
/UrSv
Are they taking hevy ripple currents? maybe there is something heating them nearby as say a transistor?
is the Resistor getting warm aswell?
is the Resistor getting warm aswell?
Warm Caps
It is due to the large aluminum can it s very common in tv set that some capacitor takes the heat, your PS has two heatsinks and they will run hot, the heat radiation will reach the big 4700 cans.🙂
It is due to the large aluminum can it s very common in tv set that some capacitor takes the heat, your PS has two heatsinks and they will run hot, the heat radiation will reach the big 4700 cans.🙂
Check my QSXPS power supply
Peranders is playing a little joke on us all.
Not an extreme joke, just a little one. He is quite aware the the large caps are connected by an inch or two of heavy PCB trace (copper is an excellent thermal conductor) to the collector of the pass transistors and that the transistor package is designed
for a low thermal resistance to the collector lead. The 470uF is decoupled thermally by the series resistor and longer PCB trace length from the pass transistor. He is also surely aware that an RC filter limits the peak charging current to the filter caps and puts less stress on them and not more. He is having a bit of Swedish fun with us and teasing us to look at his website.
An Extremely funny and clever joke Peranders! 
I hope I did not spoil your fun too soon. By the way, did everyone notice that the powe supply PCBs are for sale.
Art
P.S. You are a noty boy.
Peranders is playing a little joke on us all.
Not an extreme joke, just a little one. He is quite aware the the large caps are connected by an inch or two of heavy PCB trace (copper is an excellent thermal conductor) to the collector of the pass transistors and that the transistor package is designedfor a low thermal resistance to the collector lead. The 470uF is decoupled thermally by the series resistor and longer PCB trace length from the pass transistor. He is also surely aware that an RC filter limits the peak charging current to the filter caps and puts less stress on them and not more. He is having a bit of Swedish fun with us and teasing us to look at his website.
An Extremely funny and clever joke Peranders! I hope I did not spoil your fun too soon. By the way, did everyone notice that the powe supply PCBs are for sale.Art
P.S. You are a noty boy.
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