Robert L. Nuckolls, III wrote:
> A number of my customers have blown some rather
> small capacitors (1.2" x 1.5") rated at 22,000 uFd
> and 25v with small solder terminals intended for
> mounting to an etched circuit board. These capacitors
> are NOT suited to this task at ANY voltage rating.
> . . . the capacitors I recommend are the so called
> "computer grade" electrolytics with fat, 10-32 threaded
> screw terminals. I believe the smallest one I could
> offer was on the order of 1.3" x 2.5" and have a
> ripple current rating of well over 10 amps.
Makes sense. Need quality here, on the premise
that a big, electrolytic cap explosion uner the
cowl is highly undesirable. I can't match Bob's
expertise here, but I would suggest (to play
safe), don't cheat on the 25v rating (higher is
harmless, just heavier and costlier), but higher
capacitance may not be (increases initial inrush
current - can the solid-state Rotax regulator take
it?). I bought mine (new, screw-terminal,
computer grade) from a computer surplus store for
$4 USD (same place as my $7.50 pressure sensor pot
for the AOA indicator). But Mouser
(www.mouser.com) has reasonable prices, and
probably Digi-Key too (www.digi-key.com).
Regards,
Fred Fillinger, A063
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