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Pre-heat ballast in Lithonia Turret

Pre-heat ballast in Lithonia Turret

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Here is one of the ballasts in my new industrial fixtures. These drive the lamps nice and bright, especially when combined with 3000+ lumen lamps. The leads incurred some damage during shipping, due to them being packed with the wires wrapped around the sharp ends of the ballasts, but I was able to splice in new wire where needed.

fitz-2.jpg thorn~0.jpg turret-ballast.jpg lithonia-turret-lit.jpg

Light Information

Light Information

Manufacturer:Magnetek Universal
Model Reference:205-TC-P
Fixture
Ballast Type:Pre-heat
Electrical
Wattage:2x40W
Current:0.85A
Physical/Production
Fabrication Date:1992

File information

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Filename:turret-ballast.jpg
Album name:Patrick / Fluorescent
Keywords:Gear
File Size:750 KB
Date added:Apr 16, 2019
Dimensions:2457 x 2022 pixels
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Patrick
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Apr 16, 2019 at 09:29 PM Author: Patrick
My only complaint is these two are not as quiet as my other set of 205-TC-B ballasts. What's the most likely explanation for this, normal variation? They aren't excessively loud, but still noticeably audible from a distance in a quiet room. I prefer magnetic ballasts you can hardly hear until your ear is against the fixture. Maybe I'm too picky, but many 4' T12 magnetic ballasts I have make too much noise. I think it irritates me partially because the quieter preheat and rapid start ballasts I own prove that it is possible to attain near silent operation.

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don93s
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Apr 20, 2019 at 02:34 PM Author: don93s
Some ballasts aren't fully potted properly or there are air gaps between the potting and coils. Maybe do an experiment with a noisy ballast that isn't of value and put it under a IR heat lamp...with the bottom facing up and let it get really hot to remelt the potting inside. Since it isn't energized, there is little chance of damaging the coils from the heat, I believe.
Lightingguy1994
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May 14, 2019 at 03:38 PM Author: Lightingguy1994
Sometimes when that happens, i just tape a washer to the backside of the ballast and then secure it to the fixture. When its mounted, the fixture causes pressure on the backside of the ballast stopping the vibration.
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