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Author Topic: JB3 external power  (Read 55409 times)

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Offline fozzy

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Re:JB3 external power
« Reply #255 on: April 24, 2004, 03:29:35 AM »
my 1st thought was to run both off a 7.2ah sla now i am going to run the ua5 of rc's and pick up some smaller 4ah slas for the jb3.  Thinkin one SLA a day and recharge the RC's in the morning from the Truck.
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Offline mmmatt

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Re:JB3 external power
« Reply #256 on: April 24, 2004, 11:21:45 AM »
I'm going to pick up 2 more rc's and I should get 12-15 hrs I'm thinking... and a lot less weight.
Matt
I do think taping is the reality of the business..it is also an impetus for artists to create studio CDs that are ART, not just another recording...    Fareed Haque  2-4-2005




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Offline phishn

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Re:JB3 external power
« Reply #257 on: April 24, 2004, 06:19:06 PM »
Is it possible to run a jb3 off of a 9.6 v rc battery pack similar to what the ua-5 can use?
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Offline mmmatt

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Re:JB3 external power
« Reply #258 on: April 25, 2004, 12:06:50 PM »
Is it possible to run a jb3 off of a 9.6 v rc battery pack similar to what the ua-5 can use?

That is what I'm doing.  I'm not sure whey everyone else is using 12v... I may be missing something, but I think your batteries are most efficient the closer they are to the voltage after the converter.  I think the more voltage that the converter blocks, the more amprage is lost in the conversion.  Also the rc's are much lighter, and charge much faster.  I originally thought I was going to go 12v, but the guy at my local "battery-plus" store told me that if you charged your sla on anything other than a trickle, it would reduce the life of the battery.  Maybe there is an advantage to the 12v and one of the "car convertor hack" pioneers can answer that for us.  (Thanks again guys for all your research and tests on this thing!!!)

Matt
I do think taping is the reality of the business..it is also an impetus for artists to create studio CDs that are ART, not just another recording...    Fareed Haque  2-4-2005




Canon 24-70 f2.8L, Canon 135 f2L, Canon 70-200 f4L, Canon 50 f1.8, > Canon 5D or Canon xt (digi) and Canon 1N (film)

Offline Brian Skalinder

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Re:JB3 external power
« Reply #259 on: April 25, 2004, 12:39:59 PM »
Matt - what are you using to drop your voltage down to 5v?  7805 VR?  Car adapter?  Other?
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Offline mmmatt

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Re:JB3 external power
« Reply #260 on: April 25, 2004, 01:46:23 PM »
I'm using a variable car convertor from walmart set at 4.5 v
Matt
I do think taping is the reality of the business..it is also an impetus for artists to create studio CDs that are ART, not just another recording...    Fareed Haque  2-4-2005




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Offline Brian Skalinder

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Re:JB3 external power
« Reply #261 on: April 25, 2004, 02:04:08 PM »
I'm using a variable car convertor from walmart set at 4.5 v

Ahhhh...now I remember reading that previously.  Thanks!
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Offline fozzy

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Re:JB3 external power
« Reply #262 on: April 25, 2004, 05:32:19 PM »
JB3 and UA5 update.  I succesfully got 15 hours 20 minutes running both units from a 7.2ah SLA.  Full rig was setup.  

I will be running this in the field next week.  4 shows in 4 days.  

MK 4V > KCY 250/5 Ig (KS 10I)  > VST62IUg > 722

Offline fozzy

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Re:JB3 external power
« Reply #263 on: April 25, 2004, 09:28:46 PM »
For the people i owed pics thay are up in the pic section.  Let me know if you want any more or somethin specific.
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Offline Styx Cover Band

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Re:JB3 external power
« Reply #264 on: April 28, 2004, 12:38:59 PM »
Came across this, do you think it can power a jb3?

http://www.nemeng.com/equipment/powerpack.html
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Offline fozzy

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Re:JB3 external power
« Reply #265 on: April 28, 2004, 12:50:07 PM »
It is very possible.  He lists a PS2 and UA5 for the 9 volts so i am sure he would be willing to test out a JB3.  It is also possible that the drop down circuit/regulator is adjustable.
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Offline Styx Cover Band

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Re:JB3 external power
« Reply #266 on: April 28, 2004, 12:52:59 PM »
It's only $30, might have to pick one up and test it out.
-Bill
When you start a cover band who says Styx?

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Offline mmmatt

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Re:JB3 external power
« Reply #267 on: April 28, 2004, 03:48:57 PM »
JB3 and UA5 update.  I succesfully got 15 hours 20 minutes running both units from a 7.2ah SLA.  Full rig was setup.  

I will be running this in the field next week.  4 shows in 4 days.  


That is great fozzy.  Did you have the jb3 recording and your ua-5 peaking to music, mics on a speaker, and the whole thing going in show mode?  If so that shoots my whole drop-down voltage effiency thing to hell.  I only got 6+ hrs with 6ah on the rc's.  Although that was the first charge on the batts and they don't reach full capacity until they have cycled a couple times.  I don't think it is that much of a difference though.  Hmmm.

Matt
I do think taping is the reality of the business..it is also an impetus for artists to create studio CDs that are ART, not just another recording...    Fareed Haque  2-4-2005




Canon 24-70 f2.8L, Canon 135 f2L, Canon 70-200 f4L, Canon 50 f1.8, > Canon 5D or Canon xt (digi) and Canon 1N (film)

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Re:JB3 external power
« Reply #268 on: April 28, 2004, 04:41:35 PM »
Those results were full rig setup recording the ceiling fan.  I had the mics flying high near the fan w/o windscreens.  I had the UA5 at about 3 o'clock and my levels were right below 0db and an occasional clip when the AC kicked on and off and created a gust of wind.  During a show i am usually between 1 and 3 o'clock so that is my reasoning.  

I have 2 more shows this week.  I have already run that setup for 2 shows monday and tuesday and plan on running for the next 2 tonight and tomorrow w/o recharging.  
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Offline mmmatt

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Re:JB3 external power
« Reply #269 on: April 29, 2004, 02:03:27 AM »
awesome... +T
I do think taping is the reality of the business..it is also an impetus for artists to create studio CDs that are ART, not just another recording...    Fareed Haque  2-4-2005




Canon 24-70 f2.8L, Canon 135 f2L, Canon 70-200 f4L, Canon 50 f1.8, > Canon 5D or Canon xt (digi) and Canon 1N (film)

 

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