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Osram Spectral Sodium lamp

Osram Spectral Sodium lamp

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This old Osram lamp dates from 1963 it has 4 connections so can be used on a switch start circuit. The lamp has an evacuated outer jacket and secondary glass sleeve over the discharge tube. White coatings at either end may be to prevent thermally emitted light being added to the spectrum. The lamp is labelled SL/D1.3

Low Voltage UV.jpg small_stuff.jpg GEC_Na_s.jpg GEC_Cd_s.jpg

Light Information

Light Information

Manufacturer:Osram
Model Reference:SL
Lamp
Lamp Type:Special purpose

File information

File information

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Filename:GEC_Na_s.jpg
Album name:tuopeek / Low Pressure Lamps
Keywords:Lamps
File Size:217 KB
Date added:Sep 16, 2018
Dimensions:1877 x 2465 pixels
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Date Time:2018:09:10 21:54:35
DateTime Original:2018:09:10 21:41:29
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Focal length:55 mm
ISO:400
Make:NIKON CORPORATION
Model:NIKON D3400
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Cal
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SPTSuperSprinter156
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Sep 24, 2018 at 09:10 AM Author: Cal
Be similar design to my ML-D I guess if it has four connections. Interesting you say it can be used on a switch start circuit, that sounds a lot less complicated than the provided wiring diagram. Does a switch start setup have enough oomph to start a mercury lamp?

http://www.lighting-gallery.net/gallery/index.php?cat=11976

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tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Sep 28, 2018 at 10:26 AM Author: tuopeek
I think all the Osram spectral light family were originally designed to be run on switch start pre-heat circuits and have the 4-pin valve base. I am runing this on a autoleak 90W SOX ballast.
Cal
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SPTSuperSprinter156
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Sep 28, 2018 at 10:31 AM Author: Cal
if you look at the paper that comes with mine, it lists the instruction: https://www.lighting-gallery.net/gallery/displayimage.php?album=3429&pos=7&pid=147449

In one of the comments Andrew also gave a method to run it. I haven't yet started it up. Looking again yours is a lot smaller, and labelled 1.3 so different workings I think.

http://www.lighting-gallery.net/gallery/index.php?cat=11976

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tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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Sep 28, 2018 at 12:46 PM Author: tuopeek
Your diagram even shows a resistive setup. While I think this was the initial design it is also a good way of damaging the lamp if not done correctly. I am sure schools and colleges will have damaged some lamps this way. In fact, I have noticed an open circuit electrode in my lamp which suggests it may have had too much current during a switch start attempt. Both spectral lamps I have will start on a 90W SOX autoleak ballast, even with a damaged electrode. For extra safety you could use a ‘variac’ to supply the ballast. Your lamp look unused so can understand not wanting to try anything with it.
xmaslightguy
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^homebuilt fixture


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Sep 28, 2018 at 07:08 PM Author: xmaslightguy
Looks like a really neat lamp!
Cool find!

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

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