3 Sep
2012
3 Sep
'12
10:26 a.m.
On 09/03/2012 11:53 AM, Tom wrote:
At 06:24 PM 9/2/2012, you wrote:
Caps in that range should not be that costly. Axial leads may be scarce
but look harder.
Generally I find if one vendor does not have what I want look at another.
Allied, Digikey, Mouser, Jameco, Advent, MPJA.com and oh so many more.
Values for filter caps are flexible. the typical cap like that has a -20
+80% tolerence.
So anything from 12,000uf and up is fine and not less than 15V but not
higher than 25V
That will fit in the occupied space is fine. Yes, that 12,000uF is not a
typo! You have a fair
amount of latitude in power supplies especially older linear types..
Allison/KB1GMX FN42HH :)
Hi all --
Working on recapping an old (failed) 5V supply in that Microkit
machine I picked up last week; the main filter capacitor is rated at
16,000uF 15V, axial. So far in my searches an exact (or even close)
match in an Axial form-factor seems to be unobtainium. I can find
snap-in or screw-in types but those are going to be clumsy to
retro-fit given the space it has to occupy. (plus they're pretty
expensive.)
How far off the original capacitance value can I stray before it
compromises the original design?
Caps THAT big are probably filter caps, yes? In that case, use
anything with MORE capacitance and the same or somewhat higher
voltage-- too much higher and it won't fit on the board.
NEW: a50mhzham at gmail.com ? N9QQB (amateur radio)