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Robertson 2xF40 HPF RS Slim Ballast - RS240P-4

Robertson 2xF40 HPF RS Slim Ballast - RS240P-4

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The ballast in this fixture
Originally I just assumed the fixtures had a LPF ballast due to their brightness & the way the started

When I opened the fixture, I found it interesting to see not only a low-power HPF, but also one that's slimmer than a 'standard' RS ballast...
(standard ballast is too wide to fit in the fixture - I tried it, so might get converted to electronic RS)

HPF01.jpg A-O2X40.jpg _RS240P4.jpg _V8G1102.jpg

Light Information

Light Information

Manufacturer:Robertson Transformer Company
Model Reference:RS240P-4
Lamp
Lamp Type:Linear Fluorescent
Base:Medium Bi-Pin
Shape/Finish:T12
Service Life:-unknown-
Fixture
Fixture Type:2-Lamp
Ballast Type:Rapid Start Magnetic
Socket Type:Medium Bi-Pin
Electrical
Wattage:2x40
Voltage:120
Current:.625a
Physical/Production
Factory Location:USA
Fabrication Date:-unknown-
Application/Use:General Lighting

File information

File information

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Filename:_RS240P4.jpg
Album name:xmaslightguy / Fluorescent Ballasts - Electromagnetic Rapid Start
Keywords:Gear
File Size:104 KB
Date added:Apr 24, 2018
Dimensions:1175 x 384 pixels
Displayed:108 times
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ace100w120v
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Aug 11, 2018 at 12:14 AM Author: ace100w120v
There are plenty of reduced-output HPF ballasts, even from before they became mandatory (.76a and below). I have a .65a line current standard case size Universal in use. Came out of my old middle/high school but still worked so in a shoplight in the garage it went.

One that always intrigued me was the .77a Advance Kool-Koil ballasts, pre-PCB ban. Such an odd rating vs .80 amp...
Fluorescent05
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Oct 04, 2018 at 08:10 PM Author: Fluorescent05

There are plenty of reduced-output HPF ballasts, even from before they became mandatory (.76a and below). I have a .65a line current standard case size Universal in use. Came out of my old middle/high school but still worked so in a shoplight in the garage it went.

One that always intrigued me was the .77a Advance Kool-Koil ballasts, pre-PCB ban. Such an odd rating vs .80 amp...

When did .76a and less become a law?

Don't be fooLED, T8 IS the worst thing to do to a magnetic T12 fixture.

xmaslightguy
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Oct 04, 2018 at 08:29 PM Author: xmaslightguy
Whats interesting with .67a is that would be 80w @ 120v - so if you could build a zero-loss ballast & keep perfect power factor, you could still properly power power a pair of 40w lamps

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

Fluorescent05
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Oct 05, 2018 at 01:54 PM Author: Fluorescent05

Whats interesting with .67a is that would be 80w @ 120v - so if you could build a zero-loss ballast & keep perfect power factor, you could still properly power power a pair of 40w lamps

It would have to be magnetic though!

Don't be fooLED, T8 IS the worst thing to do to a magnetic T12 fixture.

xmaslightguy
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Oct 05, 2018 at 04:18 PM Author: xmaslightguy
Quote
It would have to be magnetic though!

Doubt it could be done.
With electronic, you could probably come pretty close though would be pretty cool if such a creature was made, and still did a rapid-start type turn on.

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

Fluorescent05
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Oct 05, 2018 at 08:21 PM Author: Fluorescent05
All fluorescent tubes have a power factor of 0.9, so that would be impossible.

Don't be fooLED, T8 IS the worst thing to do to a magnetic T12 fixture.

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