Page 1 of 1
Apple iie motherboard recapped
Posted: 08 Jun 2021 06:51
by Tomswork
Re: Apple iie motherboard recapped
Posted: 08 Jun 2021 06:53
by Tomswork
The capacitors in question are 10uf 16v axial electrolytic
I replaced them with 10uf 15v tantalum axial
And the 2e runs like new
Tom
@rubber_jonnie
Re: Apple iie motherboard recapped
Posted: 08 Jun 2021 08:43
by stephen_usher
Oh, you should really have given those tantalums a lot of voltage headroom. The semi-official advice from manufacturers is to use a voltage rating 1.5x that of an electrolytic in the same position as tantalums can't handle the spike current as well and will be damaged by short lived over voltage.
Re: Apple iie motherboard recapped
Posted: 08 Jun 2021 08:52
by Tomswork
Kemet does make a 10uf 20v tantalum axial at about 4 dollars each. While I have the 15v ones in my kit for free
Tom
Re: Apple iie motherboard recapped
Posted: 24 Aug 2021 06:02
by Tomswork
Back together and working

- 20210823_214546.jpg (165.27 KiB) Viewed 2771 times
Tom
Re: Apple iie motherboard recapped
Posted: 24 Aug 2021 08:59
by rubber_jonnie
Looking at my IIe, it seems to have similar caps to those you've fitted, though it doesn't look like re-work.
Nice Job.