On 18 Mar 2016 09:18:12 -0700, you wrote:
My 485 is, of course, full of 22uF tantalum PTH beads used forYou might consider only replacing the solid tantalums which have the
same voltage rating and voltage derating. The others are less likely
to have a problem unless they were not voltage derated.
So, what do people replace them with?I like the Nichicon PW series but any low impedance and high frequency
aluminum electrolytic capacitor intended for switching power
applications will work. The capacitance of the aluminum electrolytic
capacitor should be about 3 to 4 times the capacitance of the solid
tantalum capacitor to get an equivalent ESR and D.
2) SMD tants directly soldered onto the board (SMD isThis is a great idea assuming the parts will fit between the existing
plated through holes. I am surprised they are that much less
3) SMD tants soldered onto a tiny carrier board withI am surprised they are that expensive. If you live in a major
metropolitan area, you might check out local electronics surplus
places for inexpensive NOS (new old stock) solid tantalum capacitors.
(Some tant beads appear across potentiometers.The leakage is not *that* great and they do make low leakage aluminum
I care about performance, not about the "authentic