Topic: JB3 and UA5 battery power

[crazifyngers]

ok so there are a few theads about this already however like many other threads there is cryptic talk that I, as a n00b, don't understand. the threads are

http://taperssection.com/index.php/topic,99277.0.html
http://taperssection.com/index.php/topic,58904.0.html
http://taperssection.com/index.php/topic,92780.0.html

I would like to power my JB3 and UA5 with one battery the "Initial RB-270 Portable DVD Player Rechargeable Battery" that was on ebay for $12 .  one of the threads talks about a "juice box.  the others talk about building voltage regulators.  I am wondering if anything can be purchased that would power both with one external battery.  I am not very handy when it comes to soldering cleanly.  thanks

[rastasean]

ok so there are a few theads about this already however like many other threads there is cryptic talk that I, as a n00b, don't understand. the threads are

http://taperssection.com/index.php/topic,99277.0.html
http://taperssection.com/index.php/topic,58904.0.html
http://taperssection.com/index.php/topic,92780.0.html

I would like to power my JB3 and UA5 with one battery the "Initial RB-270 Portable DVD Player Rechargeable Battery" that was on ebay for $12 .  one of the threads talks about a "juice box.  the others talk about building voltage regulators.  I am wondering if anything can be purchased that would power both with one external battery.  I am not very handy when it comes to soldering cleanly.  thanks

Quite honestly, I am getting con-fu-sed as well!

Re: R-09HR external power

I have no idea what a "voltage regular box" is but I'll snap some pictures of EXACTLY what I'm talking about tonight.

All I was thinking about was taking the cord that you would typically use to power the JB3 with a 9 volt dvd battery and plugging it into the 09HR.

If its that simple and doesn't f up the 09HR, its a pretty simple looking cable to make for the JB3.

This isn't exactly related to the jb3 but its using the jb3 power cord so that counts for something.

\\\edit\\\\

While it may be possible (and I certainly don't have the answer) to use one dvd battery to power a Jb3 and a UA-5, it may not last an extremely long time if you're using phantom power on the ua5.

[flipp]

A JB3 takes 5 volts. The DVD battery is 9 volts. Without something to drop the voltage to 5 volts, you can destroy the JB3 by giving it 9 volts. The "juice box"es mentioned are voltage regulators that drop the battery voltage to 5 volts. Some are made with a "pass thru" that allows both 5 and 9 volts to be output; thus allowing both a JB3 and a UA5 to be powered with the corrct voltage from the same battery.

used ones appear in the yardsale from time to time, keep an eye out or post an ISO

[crazifyngers]

hmm ok so could a cable like this be utilized?



or does the ua5 use all 9v so the battery would only power one at a time?  this would be fine for my use since i can use the battery in the ua5 then when the battery runs low change it to a full battery and use the mostly drained battery in the jb3 since it still has its internal batteries.  I like to use as much of my batteries as possible but not lose a show.  thanks

[flipp]

That cable would work as long as the voltage from the battery is reduced to 5 volts before it goes to the JB3.

However you would not be able to use a mostly drained 9 volt battery to power the JB3 without the power going through a regulator. 9 volts will fry the JB3.

Using a ToddR* "juice box" I have powered both a UA5 (with phantom on) and a JB3 for over 4 hours with a WallyWorld DVD batt.

To use a UA5 and a JB3, you will either need two batteries, a 9volt and a 5 volt; or one 9volt battery and a voltage regulator box with both a "pass through" output and a 5 volt output.

One last time, you can not run a JB3 on 9 volts.




* ToddR and leegeddy both made voltage regulator boxes. Other TSers did as well but I've only used VR boxes from those two.

[crazifyngers]

yea i have the 2 batteries in.  i would rather get the cable because I like the idea of one battery instead of proprietary batteries that cost more.  the batteries don't last very long that are in the jb3 maybe 2-3 hours with both batteries installed.

so for a regular show this is fine.  but festival season is upon us and i would like to be prepared 

[Roving Sign]

Back in the JB3s hey-day...there was a lot more banter about powering solutions...BUT - understand - at that point, JB3 batteries were about 50 bucks a piece...and scarce as hell...

More recently - they have been available on ebay for under 20 bucks - cant speak for the quality/compatability factor - maybe others can testify...?

But - the JB3 is not the hot item it once was back in the early post-DAT days...so reports on 3rd party batteries are few and far between..

The JB3 batteries were pretty good when new - sounds like yours are worn a bit...a fresh set should last 5+ hours...

I guess its cool if you can lay your hands on a VR box...but personally - I prefer dedicated power supplies....(especially for the mics) and - particularly the UA5, which gets extra flaky in low power situations...

And - as far as festival use goes...heat is the major bugaboo with that recorder...

[Kush]

I used to own a Todd R. "juicebox" that had both a pass-thru 9v output and a 5v (JB3) output that would hook-up to one 9v wally-world dvd battery and it worked perfectly for what your mentioning. That being said, I sold it to fund other taping purchases. One of those was a "Leegeedy juicebox" that plugged into two 9v wally-world dvd batteries and powered both the UA-5 with a pass-thru 9v and a JB3 with 5v. I would suggest looking for one of the two I mentioned. Otherwise, I think Nick's Picks is selling or could possibly make you something like I mentioned above.

[slightlys]

I just  made some DIY cables for these DVD Batts to run my UA-5 and H120(which takes the same 5v power.) they work great!
I would be happy to make some cables quickly for anyone who needs them, free of charge, you pay shipping both ways and provide me with the following supplies for the build.

1. DVD batt cables( the ones that go between the batt and device)
2. UA-5 power cable
3. Sima SUP 2 Universal power supply( for regulating the (9v to 5v for the JB3)
Which can be purchased here: http://www.amazon.com/Sima-SUP-2-Universal-Power-Adapter/dp/B0001YFY1K

PM me if interested.

[steve4134]

So can anyone comment on the quality of the batteries they have bought of ebay for the jb3, i just picked up a  couple. Link follows... For 15 bucks each id rather have a source that I don't have to lug around...

Steve

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270342845679&ssPageName=STRK:MEWAX:IT

[jbell]

steve4134 did the batteries you purchased work with you JB3?  Looking into picking up some new batteries for my JB3

[steve4134]

I haven't tried them yet. Hopefully the get a test run Tuesday at Vertical Horizon at toads pace. They did charge up and I have tested it running on the jb3.

Steve

[jbell]

Let me know how the perform!  I would really appreciate it.