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Author Topic: JB3 external power  (Read 94071 times)

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Offline sickrick43

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Re:JB3 external power
« Reply #75 on: March 17, 2004, 08:43:33 AM »
i dunno recording time ed, but i bet rick does!!! well, youre gonna need a 12v charger too ed, so that another couple bux too!!

I haven't tested the JB3 solo on the 7Ah SLA yet. (shit, that reminds me, I need to dig them outta the bag and stick 'em on float).  The JB3 does NOT draw the 2.5a the adapter says, or it would suck a 7Ah dry in 3 hours.  I ran it and the V3 for about 4.5 hours on an EC-90 and still had 2 lights (20-60% left - real vague, but better then nothing I guess).  I'd "guestimate" you'd get about 10 hours solo.  

One day when I'm stuck in the house all day, I'll have to test it.  Or open up my leads and stick an ammeter in to see the actual current draw with the adapter - then we can just calculate it.

Rick

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Offline F.O.Bean

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Re:JB3 external power
« Reply #76 on: March 17, 2004, 09:30:52 AM »
i dunno recording time ed, but i bet rick does!!! well, youre gonna need a 12v charger too ed, so that another couple bux too!!

I haven't tested the JB3 solo on the 7Ah SLA yet. (shit, that reminds me, I need to dig them outta the bag and stick 'em on float).  The JB3 does NOT draw the 2.5a the adapter says, or it would suck a 7Ah dry in 3 hours.  I ran it and the V3 for about 4.5 hours on an EC-90 and still had 2 lights (20-60% left - real vague, but better then nothing I guess).  I'd "guestimate" you'd get about 10 hours solo.  

One day when I'm stuck in the house all day, I'll have to test it.  Or open up my leads and stick an ammeter in to see the actual current draw with the adapter - then we can just calculate it.

Rick

Rick

that'd be hella suite rick, if i get mine going soon, ill test it out!!

and thats off of a 12v, 7.2a right??
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Offline F.O.Bean

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Re:JB3 external power
« Reply #77 on: March 17, 2004, 09:32:33 AM »
oh, and 9 hrs would be perfect rick, since thats how long the v3 runs off my bp-50!@!

so i could run the v3 + jb3 for the same amount of time, and the hosa could go prolly 4 of those cycles IF i ever did tape that much!!
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

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http://www.archive.org/bookmarks/Bean420
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Offline fozzy

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Re:JB3 external power
« Reply #78 on: March 17, 2004, 11:43:04 AM »
Anyone have a good source for the creative jb3 car adapter
MK 4V > KCY 250/5 Ig (KS 10I)  > VST62IUg > 722

Offline Ed.

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Re:JB3 external power
« Reply #79 on: March 17, 2004, 05:58:26 PM »
awesome thanks for all the info...looks like i'll be set to cover everything i want to cover at broo.


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Offline John R

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Re:JB3 external power
« Reply #80 on: March 18, 2004, 10:12:21 AM »
Anyone have a good source for the creative jb3 car adapter

here

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Offline F.O.Bean

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Re:JB3 external power
« Reply #81 on: March 18, 2004, 10:20:29 AM »
john, how did you write 'here' and it linked to creative??
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

Offline Ed.

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Re:JB3 external power
« Reply #82 on: March 18, 2004, 12:58:56 PM »
substitue brackets "[" "]" for "(" and ")"

(url=http://www.thefuzz.net)the fuzz(/url)
the fuzz
« Last Edit: March 18, 2004, 01:02:36 PM by SpeshulEd »


Because nothing says "I have lots of money and am sort of confused as to how to spend it" like Bose.

Offline teajay

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Re:JB3 external power
« Reply #83 on: March 20, 2004, 12:42:58 PM »
Just thought i'd let everyone know my battery back worked last night at the show I taped.

Here's how I made it.

4 aa battery holder with lead wires
4 aa rechargeable NiMh's 1800mAh each
Female end of adaptaplug cable
Adaptaplug Size B
Crimp connectors

I just crimped the wires from the battery holder to the adaptacable, then put the adaptaplug on (check polarity), charged the batteries full. Ran them in a flashlight (thanks dklein) for a minute or so, then plugged the jb3 in...

One thing to be careful with that was happening. Whe i first ran the batteries, i didn't kill them enough so the jb3 wouldn't power up. And even with the internal battery in only it wouldn't power up, the machine sort of locked itself off. So i had to remove the internal battery and put it back in, then it started up fine...

I only ran it for the first set 1.5 hours, then switched to internal.. but i'm sure it would have gone a lto longer, i'm gonna do some tests and hopefully post results. But at least i know i can get 4 hours with the single internal and external pack

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Offline aberg

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Re:JB3 external power
« Reply #84 on: March 20, 2004, 02:54:54 PM »
Hey teajay, do you think you could take a picture of your battery pack or of the individual parts.. I'm looking to make a similar pack. Hopefully I can find all those parts at radio shack in canada..

Offline teajay

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Re:JB3 external power
« Reply #85 on: March 20, 2004, 05:08:51 PM »
aberg83, I'll get some pictures of the whole rig (incl. batteries) this week sometime hopefully... digicam's been whacked...

That's exactly where I got the parts from, a RadioShack in Canada, so you shouldn't have a problem.. I'll check my receipt, it may even have part numbers on there

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Offline aberg

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Re:JB3 external power
« Reply #86 on: March 20, 2004, 05:42:41 PM »
Nice, I ended up figuring it out anyways. Here's what I got:

a 4-AA battery holder with lead wires
4 2100mAh 1.2 V niMH AA rechargeables
a type B adaptaplug
an adaptacable

I was thinking I might not need the adaptacable, since I can probably solder the lead wires from the batt holder right onto the appropriate leads on the type B plug. The plug has polarity markings on it but they don't seem to correspond to the leads. How do you know which one is positive?

Offline teajay

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Re:JB3 external power
« Reply #87 on: March 20, 2004, 06:17:39 PM »
The word "tip" is written on the adaptaplug, and when you plug that into the adaptacable, whichever sign is ligned up with the word "tip" is the polarity of the tip... of course, the ring will be the opposity polarity... the jb3 is tip positive i believe, but check first...

you may want to use a multimeter to check from the battery holder to the tip and ring of the plug which is which just to be certain...

hope this helps
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Offline aberg

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Re:JB3 external power
« Reply #88 on: March 20, 2004, 07:10:16 PM »
Sweet, can you check these calculations for me? With the 4, 2100 mAh batteries, and assuming a 600 mA pull from the JB3, the runtime for the batts would then be:

2100/600 = 3.5 hours?

Does that check out?

Offline Brian Skalinder

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Re:JB3 external power
« Reply #89 on: March 20, 2004, 09:21:50 PM »
Sweet, can you check these calculations for me? With the 4, 2100 mAh batteries, and assuming a 600 mA pull from the JB3, the runtime for the batts would then be:

2100/600 = 3.5 hours?

Does that check out?

That's right, though you'll never achieve 100% efficiency, so ~3hrs is more likely.
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