Re: Film capacitor as power-supply filter

[Don Kuenz]

Michael Terrell <terrell....@gmail.com> wrote:
> On Friday, October 11, 2019 at 9:49:58 AM UTC-4, m...@uga.edu wrote:
>> Perhaps one economic factor is that, as the cost of other components has
>> fallen, people expect the electrolytic capacitors to be very cheap also.
>> The capacitors now stand out as the expensive components. And that's an
>> incentive to lower standards.
>
> Some of them are approaching zero value. Older equipment was expected to last
> 10 years or more. A lot of today's junk is lucky to last a year or two. In that
> respect, the costs are going up, not down. Lower grade caps are a very high
> failure item. I had one C-band receiver on the bench a few years ago. It had
> about 85 electrolytics, and every one was bad Most had no brand name, and some
> weren't marked for temperature. It belonged to a bar, and they needed it right
> away, so they paid a large bill to have it working the next day. I generally use
> Panasonic and Rubicon for repairs and my projects, these days.

Near the turn of the century a Missouri man named Chris started
badcaps.net Chris' "master list" enumerates the capacitors that he
trusts:

https://www.badcaps.net/index.php?pageid=master_list

Chris also hosts a lively forum at https://www.badcaps.net/forum/
Although its more apropos to repair.

Thank you, 73,

--
Don Kuenz KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.