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lumen lite dc fluorescent

lumen lite dc fluorescent

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shot of transistor.i replaced it.oldest pnp ge i had.

2014-07-31_14-07-51_24.jpg 2014-07-31_12-24-36_379.jpg 2014-07-31_12-24-59_505.jpg 2014-07-31_19-10-49_780.jpg

Light Information

Light Information

Manufacturer:lumen lite
Lamp
Lamp Type:f8t5 fluorescent
Fixture
Fixture Type:dc fluorescent
Ballast Type:solid state manual preheat hf
Electrical
Wattage:8
Voltage:12vdc
Physical/Production
Factory Location:usa
Fabrication Date:early 60's

File information

File information

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Filename:2014-07-31_12-24-59_505.jpg
Album name:toomanybulbs / misc stuff
Keywords:Lanterns
File Size:204 KB
Date added:Jul 31, 2014
Dimensions:2050 x 1151 pixels
Displayed:128 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-96714
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jrmcferren
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Jul 31, 2014 at 10:32 PM Author: jrmcferren
Is that the original transistor? The pictured transistor is from the 39th week of 1972.
themaritimegirl
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Florence


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Jul 31, 2014 at 11:43 PM Author: themaritimegirl
Wow, a TO-3!

Why did you replace it? Was it dead?

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toomanybulbs
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Aug 01, 2014 at 04:17 AM Author: toomanybulbs
yes.open cap probably killed it.
original was a delco with label wiped off.
newest datestamp in the unit is 6312.
that is on the dead cap.
rjluna2
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Robert


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Aug 01, 2014 at 05:12 AM Author: rjluna2
That transistor probably an overkill for power dissipation on this fixture

According to the datasheet, the maximum power output can handle up to 77 Watts.

Pretty, please no more Chinese failure.

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Aug 01, 2014 at 10:29 AM Author: themaritimegirl
Not necessarily Robert. If this lantern is based on a blocking oscillator, and was designed to run the lamp at full power, then power input could very well be 20 or 30 watts.

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toomanybulbs
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Aug 01, 2014 at 11:19 PM Author: toomanybulbs
will measure when i get a chance.
it does not even get warm.the tube produces some heat though.looks like its slightly overdriven.
unit still has a quirk though.takes several attempts at preheating to run full brightness.
likely a leaky hv cap or maybe gain of transistor.
finally something older than me that is a useful modern looking part of my solar setup!
it may still have its original ge lamp.gotta post a pic.
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Aug 05, 2014 at 07:23 AM Author: toomanybulbs
well i put the possibly original lamp away.
posted a pic.
the l8w/954 i installed does not have the starting quirk!
it can actually rapid start after warm.the very worn westinghouse in the first pics may have been just tired.but the ge looks new?
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