capacitor which one

[dynomike]

Adding a capacitor and don't know which one to order .I have a 3300 jab

[vwglenn]

Flux.



Sorry couldn't resist.

[Bryan Cotton]

Dynomike,
What are you capacitating? I am not adding any caps to my Waiex so I'm not sure where this is needed. The voltage rating of the capacitor should be in excess of what it sees, otherwise I'd say it is not super important.

[andrewp]

Good rule of thumb: double or more of the voltage you are smoothing.

[sonex1374]

These capacitors from B&C are probably the most commonly used ones. They are 22,000 uF, 40 Volt (but anything over 25 Volt is OK).

http://www.bandc.aero/electrolyticfilte ... tor-1.aspx

Jeff

[dynomike]

Great .thanks so much for the answer .

[n502pd]

These capacitors from B&C are probably the most commonly used ones. They are 22,000 uF, 40 Volt (but anything over 25 Volt is OK).

http://www.bandc.aero/electrolyticfilte ... tor-1.aspx

Jeff

Just returned to site and wished to add a few notes about these large caps some are using.
1) check the temperture ratings. It may be hotter than one would think under the tank and pannel after shutdown, or on hot days.
2) At the very least double, or tripple the voltage rating. Caps will absorb spikes on the dc line, and if the spikes are really over the voltage limit, the cap may fail unexpectedly at a later time, either shorting and venting its guts into the cockpit, or opening fuses somewhere.
3) There are also altitude specs on them. The spec may be 10,000 feet, but there are `14K+ hills in the US!
4) On condition inspections, if you are using a cap to reduce/elliminate dc buss noise, be sure to check the little button( may be colored red, white, or black) on top of the cap near the terminals. It is the vent plug, it can weep or be distended when the cap has had some sort of trauma causing the internal pressure to increase. Handle with care if yours shows these signs as it may be just like a rotten egg..touch it haphazardly and you may be covered with some nasty stuff. Dont ask how I know about eggs!
5) These types of caps do age and their effectiveness can deminish with time, especially when in hot conditions.