Topic: HOSA ODL 276 w/9v How long does it last?

[Nate]

did the advanced search, but couldn't seem to come up with an exact answer.  I found out how to build an external ps, but not how long they actually last....or maybe I am just WAY off?

I have a HOSA 276 and I built the small 9v external ps for it.  I used a new (non rechargable) 9v battery for 2.5 hours, no problem.   About 20 minutes into set 3 the other night....it started putting in little dropouts on the wav file (didn't notice them until I opened the file on the PC)   

So, how long will a single 9v power a Hosa 276?   My experience tells me about 2.5 hours.   Is this consistent with what you all are getting when using a single 9v ps?     From the FAQ post below, I was thinking I should be getting much more than 2.5 hours.  Thoughts?  help?

Nate


>>>>>>>>

[090] How do I power my Hosa ODL-312 or ODL-276 digital format converter?

Both these units run on 9VDC external power.  Both the ODL-312 and -276 are field powerable by a NiMH 9.6v RC rechargable battery.  Simply build yourself a power cable to convert the stock RC battery connectors to the connector required by the ODL boxes.  I cut off my ODL-312 connector from the stock wallwart cable and crimped it to a male Tamiya connector (the RC battery has a female Tamiya connector).  Even a 1600 mAH RC battery will power the Hosa boxes for a long time.  The Hosa boxes specs say 50mA current draw, so theoreticaly max run-time on a 9.6v NiMH 1600 mAH RC battery would be 1600 mAH / 50mA = 32 hrs.  That's a loooooong time!

[Brian Skalinder]

2-1/2 hrs sounds about right for a plain old alkaline 9v - standard 9v batts just don't hold much capacity and don't do well under relatively high load situations.  Dunno about alkalines, but NiMH rechargables only have capacity around 150-200mAH.  At 50 mA draw, that's around 2-1/2 hrs.

The quote from the FAQ is for a 9.6v RC battery with 1600 mAH capacity (v. 200mAH for an alkaline).  Big difference in capacity = big difference in run-time.  There's a thread in the Archival Info forum about building your own battery packs, including RC batt packs.

[Nate]

Thanks for the help.  I was hoping to create as low profile (like I need another battery to charge )...but it looks like I'll have to build that.

Bri- you might add a line in section 090 of the JB3 FAQ which addresses 2-2.5 hours run time on a plain old 9v. 

Looks like I'll be building a new battery...or changing out the 9v a lot more often.

[dnsacks]

Nate -- why not run both the v3 and hosa off of one of those 9v walmart lithium ion batteries?

I'd bet that one battery would power both for a real long time.  Plus, the walmart batteries are really small and light.  Anybody have any direct experience?

[mmedley.]

About 20 minutes into set 3 the other night....it started putting in little dropouts on the wav file (didn't notice them until I opened the file on the PC)

Please tell me you ran your DAT backup.

[Nate]

About 20 minutes into set 3 the other night....it started putting in little dropouts on the wav file (didn't notice them until I opened the file on the PC)

Please tell me you ran your DAT backup.

I did run a dat backup....since I'm still getting the hang of the Nomad thing.
Good idea on the walmart battery idea.

[deadheaded]

the typical 9 volt battery is 500 m/a and the odl-276 draws between 30 and 50 m/a, info from hosa, so that would be about 10 hours.  i have one customer who uses a 9 volt for his odl-276 and has never had any power problems.
ed

kindkables.com

[jasonrockhill]

Is there a step by step on this....I am heading to Radio Shack after my next exam and need to know how to build this thing....any help here?  Not tech-savvy at all...thanks for the help today kids!

Rockhill

[Brian Skalinder]

Is there a step by step on this....I am heading to Radio Shack after my next exam and need to know how to build this thing....any help here?

Per my response to your other post asking the same question:

Is there is a step-by-step instruction guide online for builiding the RC battery pack online somewhere?  Will it be a problem finding the correct adaptor since I do not have the a/c power cord that comes with the unit?  Can someone guide me thru what will be needed for my trip to radio shack tonight?

Check the Archival Info forum for a DIY thread on building SLA and RC battery packs.  I don't know the specific RS plug # or specs for connecting to the Hosa box, but it looks like one of the standard adaptaplugs RS carries.  Just take the Hosa box into RS and try the different plugs to see which one fits.

[Idle Wind]

does anyone know the adaptaplug # for the Hosa ODLs?

I bought an AES Hosa off the board - came with a hacked power cable
and a coupla 9.6V batts.  I bought a brand new Coax Hosa, which
came with the AC adapter.

I'm headed to the Beacon this weekend, and was thinking of
patching with my JB3 (rather than my trusty D8 and Oade cable).

I bought a RS 7.2 / 9.6 V charger, and charged one of the batts,
but something's up - when I hook it up, the light may go on or off
- nothing definitive about wiggling the wire, adjusting the plug, whatever. 
I even tried the old "smack the battery" trick some people have been
mentioning re: JB3 batts.  I don't think its the batt, since when it's on
the light is strong.  and when its not, its not.

I'd rather not hack my other AC cable, and I'd rather have a Right Angle
power connector, and given the uncertainty of this power solution,
I'm going to try a new adaptaplug cable.

[Brian Skalinder]

does anyone know the adaptaplug # for the Hosa ODLs?

I don't recall seeing it posted, but someone may know...we'll see.  At any rate, you could always take it into your local electronics shop and try different plugs to see which fits.  If/when you do find out which plug, please let us know!

[fozzy]

TI makes a nifty little setup-up voltage regulator that outputs 9v.  I power my hosa off the same power supply for my SBM1 and JB3. (4x 7.2v 3400Mah RC NiMHs)

The step up is a TI PT5045 which i can't find anyone that carries it but TI will send you one for free.  It is a very simple circuit to build since all the magic happens inside the PT5045.  basically a capacitor on each side and input and output leads. 

EDIT: PT5045 runs @ 4.75 to 8 volts   (6vSLA and 7.2 wallmart li-ion will work perfectly)  For those running 12v a simple voltage regulator(or car adapter) would work to achieve 9v

[bagtagsell]

How long?
Four-Ever-Er on a 9.6 race car battery

Adapt plug "b"

[Idle Wind]

How long?
Four-Ever-Er on a 9.6 race car battery

Adapt plug "b"

I went with Adaptaplug C, and it works fine.
I brought the Hosa AC adapter in, rather than the
box, which I should have done, so it was a guess,
as B and C are very close.  C is a little fatter, I think.
ends up a nice fit.

I also got an adaptaplug power cable and an RC
connector with crimp on ends.

I'll post pictures and part #s soon - have some work
to do tonight and tommorow, then I'm off to the Beacon.

[John R]

this will last all weekend

[Idle Wind]

Here's an easy-squeezy no soldering power cable to go from
a 9.6V Race Car battery to a Hosa box.

All Parts from Radio Shack

Part 23-445 - 9.6V Battery Pack and RC Car Connector Repair Kit $2.99
                (has two of the RC connectors with crimp on thingies)
                you might want to throw some tape on after crimping, but
                these ended up pretty secure...

Part 273-1743 - Replacement Adaptaplug Socket $2.99
                (to crimp n the end of the RC connectors, above)

Part 273-1706 - Adaptaplug C $4.99
                 (this is the one I chose, fits nicely.  bagtagsell says Adaptaplug B works as well)

crimp, connect and yer ready to go....

I'm sure this can be done cheaper or easier, but this worked for me.

[Roving Sign]

Wow...are you sure you werent testing a CO2?

[Roving Sign]

Old threads never die...

I just did a few tests similar to the one first posted by action man.  I too built a 2x9v alky pack to power the 276 and through testing with two JB3s, two toslink cables and all running into a Wmod SBM-1 I too am seeing numerous drops outs preceded by a small zit.

The batts are all pretty full but the 9v could actually be operating at less than 8v.  Could this be a factor w/the 276?  I too am looking at a smaller power pack and may have to go to the RC 9v option.

I also did a test running batt box> analog > Line in to the JB3 and didn't get any of the affore mentioned drops or zits.  I'll test it with the other JB3 too but for now I'm thinking low voltage is an issue.

Thanks for comments.  I'm off to scan the archives

dave

Did you test the Hosa with the wall-wart? Just curious...