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Post by strick on May 19, 2008 9:13:40 GMT -5
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Post by stevec5000 on May 19, 2008 10:29:55 GMT -5
Looks just like that photo on ebay, a can with 2 terminals on the end.
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Post by aero on May 19, 2008 10:30:19 GMT -5
That's the sort of thing....but it must be 25 volts minimum. Rule of thumb is go 1.5 times the max system voltage. 40, 50 or 100volts are also good. What you want to ask for is 'an electrolytic capacitor with a capacity around 10,000 uF and a minimum voltage rating of 25' Consider also how you will connect it. Lightweight boardmount fly leads won't last 5 minutes, you want heavy duty connections like the one in the picture, or solder tags to solder on your own leads. The ones I have are identical to the ones in your picture but are made by Sprague, some HI-FI buff will probably linch me for using them for this purpose! Like these: cgi.ebay.co.uk/93000uF-40-V-ELECTROLYTIC-CAPACITORS-PAIR_W0QQitemZ190221599432QQihZ009QQcategoryZ4662QQssPageNameZWDVWQQrdZ1QQcmdZViewItem |
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Post by malakiblunt on May 20, 2008 3:54:27 GMT -5
Just found this thread whilst googling bat eliminators for my XT. I saw the sprague capacitors on ebay you linked to aero, and nearly brought them till i got the ruller out, ther bigger than my battery! though no doubt a good deal lighter. ive fround a 10,000uf 35v but ther for pcb mounting so aper to only have solder tags but the do only cost about £2 would it be sutaible ? (or will the leads just fall of from the vibes  ) cheers |
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Post by aero on May 20, 2008 5:42:24 GMT -5
I only realised after I posted that they are 93,000uF monsters, not the 9,300uF I thought!
Solder tags are fine, if you buy a battery elimintor from a bike supplier it will have solder tags with leads soldered on to suit the bike.
The ones to avoid are the ones with permentaly attactched thin wire at each end intenended for PCB mounting.
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Post by malakiblunt on May 20, 2008 5:58:27 GMT -5
Thanks Aero, yes the ones i was looking at are intended for pcb mounting, i cant find any with the nice screw terminals . With the pcb ones would they work if i can find away of seculy ataching the leads? as im thinking i could epoxy encapsulate the leads in. so much effort just to save a couple of quid! lol how cheap am i  |
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Post by aero on May 20, 2008 9:10:57 GMT -5
There won't be any difference in price because of the contacts. Its the capacity, voltage rating and what materials its made from that affect the price. Anyhow, thats about all I can tell about these things. Now its down to you guys to take the plunge and go out and buy something and make it work  |
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sven
Full Member
Posts: 166
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Post by sven on May 20, 2008 12:42:42 GMT -5
Some caps have M5 (or M4?) threads which I think is a nice solution...
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Post by stevec5000 on May 20, 2008 13:34:11 GMT -5
Thanks Aero, yes the ones i was looking at are intended for pcb mounting, i cant find any with the nice screw terminals . With the pcb ones would they work if i can find away of seculy ataching the leads? as im thinking i could epoxy encapsulate the leads in. so much effort just to save a couple of quid! lol how cheap am i You could trim the leads rather short then solder flexible wires to them and insulate with tape or heat shrink tubing. The problem is caps meant for PC board mounting probably will not be large enough unless you connect several of them together in a series/parallel configuration so it's better to go with a larger one that has screw terminals and comes in a sturdy case that can withstand the rigors of motorcycle use. |
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Post by malakiblunt on May 20, 2008 14:19:46 GMT -5
well i found a 10'000uf 35v one wich should be big enough, it only costs £2 so i might give it a try whats the worse that can happen i blow my head light bulb?
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sven
Full Member
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Post by sven on May 20, 2008 15:02:34 GMT -5
... whats the worse that can happen i blow my head light bulb? No, blow the cap (e.g. by false connection). |
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smoris
Junior Member
Posts: 31
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Post by smoris on May 29, 2008 2:55:48 GMT -5
is it dangerous to use a (to) small cap?
I tried a 2200µF yesterday and it works fine, just some flickering on idle when switch on turning signal.
I just dont want to blow my regulator or other electric parts.
greetz
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Post by stevec5000 on May 29, 2008 8:11:04 GMT -5
>is it dangerous to use a (to) small cap?
I don't think so, I've run mine without a battery or a cap and it didn't hurt anything. Even with a large cap you still get some flickering when the turn signals are on since there's no battery to supply the extra current needed by the lights but there are no other ill effects.
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Post by malakiblunt on Jun 8, 2008 14:54:23 GMT -5
just brought a 10,000mf 40v cap with screw terminals for 99p! on ebay of courses
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Post by maskman on Jun 9, 2008 19:16:37 GMT -5
Another source for a battery eliminator (capacitor) is Thumperstuff: www.thumperstuff.comI bought mine a few years ago and it has worked fine since I installed it. They're $25 (plus shipping) and come with a rubber covered strap to mount them with. The capacitor has screw terminals, and the original battery terminal wires will work with it. I'll post a picture of mine as soon as I can figure out how to post pictures to this forum. Hope this helps! |
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