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Sola Lead-Lag Stroboscopic Corrected Internal Starting Compensator Tulamp Preheat Ballast (1940s-1950s)

Sola Lead-Lag Stroboscopic Corrected Internal Starting Compensator Tulamp Preheat Ballast (1940s-1950s)

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This ballast lives in a 1940s Mitchell preheat F40 shop light I have. Works well and is nearly silent and drives lamps nice and bright, but reportedly this exact model is known for making a nasty, PCB and tar mess according to fellow LG member RicksBulbs who has had lots of experience with these. I should source a replacement ballast for that eventuality but in the meantime plan on fusing it and using only 40 watt lamps, no 34s!

This was the last thing my roommate ever saw before they moved out, right as they were right about to leave they were eyeballing the fixture, so I plugged it in for him and took the reflector off to show him the innards. He got a kick out of that! He's admittedly one of the misLED ones, but still appreciates this well-made, heavy, vintage fixture. It's nice and bright even with Daylight Deluxe lamps.

IMG_0909.JPG IMG_0905.JPG IMG_0856.JPG IMG_0864.JPG

Light Information

Light Information

Manufacturer:Sola
Wattage:2X40
Lamp Type:Linear Fluorescent
Fabrication Date:1940s-1950s
Voltage:120v

File information

File information

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Filename:IMG_0909.JPG
Album name:ace100w120v / Ballasts
Keywords:Gear
File Size:432 KB
Date added:Dec 16, 2016
Dimensions:1848 x 2465 pixels
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rjluna2
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Robert


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Dec 16, 2016 at 06:28 AM Author: rjluna2
That's interesting, the tan line uses the bulb and the starter as in series between the ballast

Pretty, please no more Chinese failure.

ace100w120v
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Dec 21, 2016 at 12:39 PM Author: ace100w120v
Is this typically now how it was done? I'm totally new to these.
joseph_125
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Dec 21, 2016 at 10:29 PM Author: joseph_125
It's a commonly found in some 4' two lamp ballasts. The lamp that has the starter circuit wired into the ballast is the lead lamp. The starter circuit on that lamp has a starting compensator to increase the preheat current. The starting compensator is basically a small inductor that cancels out the effects of the lead capacitor during preheat.
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