On Sun, 17 Feb 2019, Phil Allison wrote:

Fox's Mercantile wrote:


wrote:
Yes, the original question was which caps are BEST, but much of my
concern is based on the failed motherboards, which only lasted a year or
so.

Which, as usual, you didn't make at the beginning.

The Failed motherboards were, Dell.
Their "Lets buy cheap ****" almost put them out of business.
And that was almost 20 years ago.


** This old Wiki has the story:

https://en.wikipedia.org/wiki/Capacitor_plague

The brands of capacitor involved were previously unknown and unable to be linked to any of the well known makers.

AFAIK the issue never involved electros that might be used in restoration of vintage tube gear.

"tubeguy" is a ****wit - see " top definition " :

A little knowledge can be a dangerous thing.

People hear the stories, but don't grasp the details. Modern use of
electrolytics is different from the tube days. Not only have values gone
up as size got smaller, but they are often expected to handle much higher
frequencies than 60 or 120Hz in the days of tubes. Electrolytics are also
a lot more common in the days of solid state. In tube days, a bad one
would mean low voltage, or hum, or low audio gain, but there were a
handful of electrolytics. Now they are everywhere, a shift to low
impedance so larger values needed, and that means electrolytics. The
circuitry is now more complicated and a bad capacitor may not be so
obvious as in the old days.

Michael