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

Quote from: phishn 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?

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'm using a variable car convertor from walmart set at 4.5 v
Matt

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.  

Came across this, do you think it can power a jb3?

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

It's only $30, might have to pick one up and test it out.

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.