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Battery for Quasar Tubes Q-LED X CrossFade


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#1 Alexander Sutton Hough

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Posted 08 December 2017 - 11:38 PM

Hi does anyone know a battery option for Quasar Tubes Q-LED X CrossFade? Is there a DC to AC inverter for V Mount batteries?
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#2 JB Earl

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Posted 11 December 2017 - 09:40 AM

I've run them on a department store inverter plugged into a cigarette lighter and a jump start battery.  

I called quasar about this and they didn't have any real guidance on other than an inverter and battery should work fine.


Edited by JB Earl, 11 December 2017 - 09:41 AM.

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#3 Phil Rhodes

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Posted 11 December 2017 - 10:35 AM

I'd be astonished if they didn't use a DC bus internally. Is there no way to mod them for direct DC power?


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#4 Vladimir Cazacu

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Posted 11 December 2017 - 10:39 AM

Considering how ridiculously expensive they are to buy in Europe, I was thinking of the same thing: buying the US version and an inverter + v-mount or a 220v to 110v step down for inside use.

 

My only concern would be regarding flicker (step down would still be running at 50hz) and cheap car inverters might be PWM based.


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#5 Phil Rhodes

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Posted 11 December 2017 - 10:49 AM

They won't flicker, it'll all be DC driven.

 

Someone send me one and I'll look at it :)

 

Yes, they are absurdly expensive here. Fly to LA and buy more than a few and be quids in!


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#6 Vladimir Cazacu

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Posted 11 December 2017 - 11:11 AM

Yes, they are absurdly expensive here. Fly to LA and buy more than a few and be quids in!

 

 

Tell me about it.

 

The 4' Crossfade 120VAC costs - 275$ in the US

The 4' Crossfade 220VAC costs - 466$ in Europe


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#7 Alexander Sutton Hough

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Posted 29 December 2017 - 04:01 PM

Ok so I cant find a V Mount battery inverter. But what if I used a power pack with its 100w AC invter like this one to power 2 50w quasars tubes? https://www.amazon.com/50000mAh-Portable-Generator-Rechargeable-Notebook/dp/B06XBPQKTR/ref=sr_1_13?ie=UTF8&qid=1514581004&sr=8-13&keywords=power+pack+ac+inverter 

 
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#8 Samuel Berger

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Posted 29 December 2017 - 04:07 PM

I got one with an interocitor. The original machine had a base plate of prefabulated aluminite, surmounted by a malleable logarithmic casing in such a way that the two main spurving bearings were in a direct line with the pentametric fan. The latter consisted simply of six hydrocoptic marzlevanes, so fitted to the ambifacient lunar waneshaft that side fumbling was effectively prevented. The main winding was of the normal lotus-o-delta type placed in panendermic semi-bovoid slots in the stator, every seventh conductor being connected by a nonreversible tremie pipe to the differential girdlespring on the "up" end of the grammeters.


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#9 Ed Conley

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Posted 02 January 2018 - 05:33 PM

Samy's camera carries a Dynalite product  XP1100 battery/inverter that would work.

 

No longer available for purchase though.

 

 

google image

 

http://beauphoto.blo...ite-xp1100.html


Edited by Ed Conley, 02 January 2018 - 05:34 PM.

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#10 Jaron Berman

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Posted 04 January 2018 - 03:44 PM

https://www.bhphotov...to_vehicle.html

 

or

 

https://www.bhphotov...icle_cigar.html

 

with

 

https://www.bhphotov...continuous.html

 

I believe the 4' crossfades are 50w?  Should be able to do 2x tubes with a 150w inverter, wouldn't go much smaller though.


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#11 Phil Rhodes

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Posted 04 January 2018 - 05:03 PM

It's a bit daft there's no battery option. LEDs are low voltage devices, usually.
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#12 Stuart Brereton

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Posted 04 January 2018 - 05:14 PM

It's a bit daft there's no battery option. LEDs are low voltage devices, usually.

From their website:

 

"Many modern LED lamps run on 12volt which can be very useful especially on battery packs however 12volts is highly problematic when powering large scale arrays with multiple lights or when needing to cable more then 12 feet / 3 Meters from the power source where line loss effects the output and performance of the LED luminaire."


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#13 Phil Rhodes

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Posted 04 January 2018 - 05:18 PM

Sure, but that all applies to every 50W light out there.

Although on second thoughts, while it'd be wasteful, if their electronics don't deal with slightly variable input power, there's stuff wrong.
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#14 Stuart Brereton

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Posted 04 January 2018 - 06:24 PM

Sure, but that all applies to every 50W light out there.

Although on second thoughts, while it'd be wasteful, if their electronics don't deal with slightly variable input power, there's stuff wrong.

I'm not taking sides, just drawing attention to what they said.


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#15 Jaron Berman

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Posted 04 January 2018 - 08:01 PM

Almost forgot - check the specs on the inverter - I saw Alexander's other post. Some of the ultra-cheap inverters can't go above like 15v without frying, and a fresh brick can be 17+.... so either check the specs or put a small voltage regulator inline on a good heat sink to dissipate a couple volts.  

 

As for voltage - all of the strip/tubes I've taken apart have been relatively high voltage internally, like 90+vdc.  Not sure on quasar but one of my 4' died so I'll pop it open and see.


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#16 Vladimir Cazacu

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Posted 05 January 2018 - 05:07 AM

Please do tell us what's inside of the Quasar, Jaron.


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#17 Phil Rhodes

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Posted 05 January 2018 - 05:44 AM

They're probably running the LEDs in reasonably long strings for efficiency's sake, it's easier than ever to do that these days.
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#18 Phil Rhodes

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Posted 05 January 2018 - 05:50 PM

I'm not taking sides, just drawing attention to what they said.

 

Oh, quite, I'm just querying what they said, which translates in my head to "we don't have that and we don't want to be criticised for not having it."

 

Also Yuji has some rather similar things which are much (much (much, much)) cheaper. Though they're still mains-only.

 

https://store.yujiin...ri-t12-led-tube

 

Litegear actually advertise their small-diameter fluorescent-style strips as being made using their VHO strip, which really, I mean, you could make. In the shed. In ten minutes, using some sticky tape and plastic tube.

 

Edit: I called the company "literibbon," for reasons of the brainworms.


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#19 Stuart Brereton

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Posted 05 January 2018 - 07:09 PM

In fairness to QS, they do have battery powered 2ft bi-color tubes available, they're just a lot more expensive again.

 

If those Yuji tubes are dimmable, and as color accurate as they say, they could be an interesting choice. Shame they're not bi-color.

 

Litegear equipment is crazily overpriced in my opinion.


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#20 Alexander Sutton Hough

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Posted 05 January 2018 - 10:05 PM

Almost forgot - check the specs on the inverter - I saw Alexander's other post. Some of the ultra-cheap inverters can't go above like 15v without frying, and a fresh brick can be 17+.... so either check the specs or put a small voltage regulator inline on a good heat sink to dissipate a couple volts.  

 

As for voltage - all of the strip/tubes I've taken apart have been relatively high voltage internally, like 90+vdc.  Not sure on quasar but one of my 4' died so I'll pop it open and see.

I am going to give it try with these parts this weekend.

 

https://www.amazon.c...0?ie=UTF8&psc=1

https://www.amazon.c...0?ie=UTF8&psc=1

 

Also got a hold of this power pack with inverter and is working so I have something for now. https://www.amazon.c...0?ie=UTF8&psc=1


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