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liteway/loa choke

liteway/loa choke

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from one of those cheap shoplights.
note the thermal fuse(blown)

20150918_114228[1].jpg 20150918_114236[1].jpg 20150918_114247[1].jpg Fluorescent_Tubes.pdf

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Light Information

Manufacturer:loa/liteway

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Filename:20150918_114247[1].jpg
Album name:toomanybulbs / misc stuff
Keywords:Gear
File Size:288 KB
Date added:Sep 18, 2015
Dimensions:2465 x 1386 pixels
Displayed:112 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-111889
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Solanaceae
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Sep 18, 2015 at 07:27 PM Author: Solanaceae
That thing is unusually small based on its application...

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Ash
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Sep 18, 2015 at 07:58 PM Author: Ash
The capacitor is the actual ballasting element - The choke is there as a starting device and to drop the crest factor somewhat (otherwise the thing would destroy lamps in a blitz)
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Sep 19, 2015 at 01:24 PM Author: themaritimegirl
It still has to have as much as 0.43A go through it, though. Yet it's smaller than a 0.16A T5 choke.

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Sep 19, 2015 at 01:43 PM Author: Ash
It does not have to be of high inductive value, so much lower number of turns.....
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Apr 14, 2019 at 09:01 AM Author: ultralume
How does that choke power a 40 watt lamp from 120V
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Apr 14, 2019 at 09:01 AM Author: ultralume
How does that choke power a 40 watt lamp from 120V
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Apr 14, 2019 at 09:10 AM Author: dor123
40W can't operate at 120V from choke. It require an autotransformer ballast.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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^homebuilt fixture


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Apr 14, 2019 at 09:55 AM Author: xmaslightguy
With the capacitor it ups the voltage enough to work off 120v. The lamps are running somewhere in the 25w-30w range rather than 40w

Interestingly enough, with the LOA version (which has no thermal protection) when a choke goes up in smoke - and thus is shorted, the light will still light at probably half its original brightness, running of just the capacitor.

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

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Apr 14, 2019 at 07:11 PM Author: ultralume
Interesting. I suppose the capacitor is in series with the choke and line. I'm assuming that it's value is either too small or too large to resonate with the choke and cancel it's inductive reactance and overdrive the lamp
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Apr 14, 2019 at 07:35 PM Author: xmaslightguy
@ultralume:
Yep, capacitor is in series with the choke. Somewhere I read that it was a 4uf/200v. I had a fixture where one of the capacitors had went bad, so I used a replacement with those specs & it works fine.

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

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Apr 14, 2019 at 07:48 PM Author: ultralume
Interesting. I will try it. I'm assuming the capacitor maintains some voltage at zero crossover of the AC cycle and adds voltage to the mains to restrike the lamp.
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Apr 14, 2019 at 08:09 PM Author: ultralume
I saw one of the LOA shop fixtures in operation. It seemed bright and did not appear to under drive the lamps, not to mention started the lamps quickly in cold weather. The simplicity of the choke and capacitor ballast is intriguing..
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Apr 14, 2019 at 08:35 PM Author: xmaslightguy
@ultralume:
They do underdrive, I remember the box said something like "69 watts Total"
I do like the idea/simplicity of them, but my biggest complaint is the lack of thermal protection.

As for cold starting... depends on how cold, if its cold enough they'll flicker horribly til the lamps warm up(if its too cold for them to warm up you do risk frying the choke), and if it gets enough below zero (F), they won't do anything at all(which is actually good since it acts as a safety feature)

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

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