Topic: Jb3 External Power Q (yes another one)

[Sterling]

Not sure if this was covered in the below thread but if I were to use the 12V does it have to be 7ah or can I use a higher like 10ah. Also, with the "car adpator" and the 4 pin shuold I still put a fuse in? Just trying to plan for the festivals. Thanks guys.

Sterling

[Brian Skalinder]

The AH rating of the battery determines how long your battery will last - the higher the AH rating, the longer it'll last.  So you should be fine with either 7AH or 10AH.

If it were me, I'd still put a fuse in (unless the car adapter has one built in).

[Sterling]

Thanks Brian! 10ah with a fuse it! Hey, you goin to STS9 next friday? MY girlfriend and I are thinking of making the trip down, this time actually staying and not having to drive home. Any hotel recomendations?

SS

[F.O.Bean]

fuse huh??? good point, i NEVER thought of that!!

[ChrisV]

Hmm, fuse?
I haven't built mine yet but I am thinking whether I should use a fuse or not.   I was just wondering what exactly is a fuse protecting against when you are hooking it up to battery?   I always like to be on the safe side so if there is the possibility of something going wrong I'd probably want to insall one then.

I can see my car adapter I just bought has a fuse mounted in the car lighter plug part and I can see how there can be unexpected surges it is protecting against(like when starting the car which is not recommended to have plugged in when doing anyways).   But I was planning to snip that off since they are 2 seperate units and didn't need the car lighter piece.

[sickrick43]

I think in this case, the fuse is to protect the CAR WIRING more then the JB3 - from shorts and overcurrents.  If your JB3 flipped out and developed a short, you'd pop THAT fuse instead of the one in your car, or worse yet, fry wires in your in your cars wiring harness.

A battery will likely NEVER send out more current than is called for by the device on the other end, a fuse WILL however protect that BATTERY in the event or a short in the JB3 or adapter wiring.

In short, if you got room in your hack/DIY mods to put one in, it certainly can't hurt, but it protects the power source & not necessarily the JB3.

If you DO choose to include a fuse, make SURE you carry an extra one with your rig.  Nothing like blowing one and not having a spare with you.

Rick

[ChrisV]

Ahh,
I never thought about it going in the other direction.  Well if all I am protecting is the batteries and I probably not going to hassle with it.   I was mainly concerned with protecting my JB3 and UA-5 when I build my battery cables soon for both of those.

[Sterling]

Ya I figure for .25 why not install one to be ont he safe side. And I bought 10 which are always in my bag  .
Sterling

[F.O.Bean]

stearnskid, i like that trey quote from amsterdam!!!

on the back of the worm, haha, classic!!

[nic]

stearnskid, i like that trey quote from amsterdam!!!

on the back of the worm, haha, classic!!

actually, I *think* its from Va Beach 7-21-1997

[F.O.Bean]

nah, the back of the worm is when he ate a bunch of shrooms over in amsterdam, and wasa pissing in an outhouse, and he said it felt like "riding the back of the worm"

7-1-97;-)

[F.O.Bean]

but you were DAMN close, one number off, not shabby bro

[phishn]

nah, the back of the worm is when he ate a bunch of shrooms over in amsterdam, and wasa pissing in an outhouse, and he said it felt like "riding the back of the worm"

7-1-97;-)

What are shrooms?    

[nic]

bean, Trey talks about the "back of the worm" at the 7-21-97 VaBeach show as well

[F.O.Bean]

nice, ill have to give it a listen, it was earlier that month that he experienced it!!

greg-i have no clue;-)