|
Title: “Computer Grade” Filter Caps Post by: WA2SQQ on July 21, 2020, 08:40:43 AM One of my 50A 12V supplies is begging for some TLC. At very least it needs new filter caps. So I’ve always wondered why they use these large computer grade filter caps? I can easily parallel two physically smaller caps to achieve the same value. What am I missing?
Title: Re: “Computer Grade” Filter Caps Post by: KI4YAN on July 21, 2020, 01:43:43 PM The ripple current rating.
Make sure your paralleled pair meets or exceeds it. Title: Re: “Computer Grade” Filter Caps Post by: W1RKW on July 21, 2020, 04:57:49 PM I think low ESR, inductance and high temp rating for SMPS's is what distinguishes them from other caps.
Title: Re: “Computer Grade” Filter Caps Post by: KD6VXI on July 21, 2020, 05:52:53 PM I think it's they where all the rage years ago.
Technology has marched in, and they are pretty much absolete today. I use snap ins exclusively now, had boards made up for ease of use. --Shane KD6VXI Title: Re: “Computer Grade” Filter Caps Post by: WBear2GCR on July 21, 2020, 09:18:07 PM Afaik "Computer Grade" was a spec for actual power supplies for computers dating from
the 1970s through the late 1980s when the supplies were big linear supplies. They had to handle 24/7 operation, heavy current draw, and the like. They were typically big cans. Today modern cap construction makes for a physically smaller cap. Title: Re: “Computer Grade” Filter Caps Post by: WA2SQQ on July 22, 2020, 10:46:14 AM Thanks for all the input. All as I had thought it might be. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
|