12-27-2022, 01:14 PM
Yes I also use film caps to stuff the electrolytics if one with the proper capacitance can be found. I use Solens, or whatever sold in AES or Mouser.
This said, good quality (Panasonic or Rubycon, or Chemicon low ESR / High Ripple current) electrolytic caps are just fine to be used. They are smaller size, and if one worries about 450V net being enough (though this is what was used in the original factory chassis'), two of them of twice the capacitance could be serialized to achieve the required capacitance and double the voltage, with the ripple current specs still kept. Those I use are 22uF/450V Panasonic ones, and their ripple is on the order of 670mA which is many times that needed. Considering the service hours formula contains voltage, current and the ambient temp, 105 degrees ones with double the voltage will serve forever and will certainly outlive any of us here, and maybe even the next generation.
PS. I do not use the leakage equalising resistors across the serialized caps as any single cap is still capable of withstanding the full voltage.
This said, good quality (Panasonic or Rubycon, or Chemicon low ESR / High Ripple current) electrolytic caps are just fine to be used. They are smaller size, and if one worries about 450V net being enough (though this is what was used in the original factory chassis'), two of them of twice the capacitance could be serialized to achieve the required capacitance and double the voltage, with the ripple current specs still kept. Those I use are 22uF/450V Panasonic ones, and their ripple is on the order of 670mA which is many times that needed. Considering the service hours formula contains voltage, current and the ambient temp, 105 degrees ones with double the voltage will serve forever and will certainly outlive any of us here, and maybe even the next generation.
PS. I do not use the leakage equalising resistors across the serialized caps as any single cap is still capable of withstanding the full voltage.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
