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Osram 250W MA/V lamp, etch on cap

Osram 250W MA/V lamp, etch on cap

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This marking on the cap indicates that this lamp was made for the UK military, the number is the NATO stock number, also you can see the broad arrow symbol.
There are a couple of cracks in the cap which can be seen, I don't know how this happened but it is probably the reason that the cap is very slightly loose, so care needs to be taken in handling.

DSC02617.JPG DSC02619.JPG DSC02620.JPG DSC02622.JPG

Light Information

Light Information

Manufacturer:Osram-GEC
Model Reference:MA/V
Lamp
Lamp Type:Medium pressure mercury vapour lamp
Filament/Radiator Type:Aluminosilicate glass arc tube
Base:GES (E40)
Shape/Finish:Clear tubular
Service Life:Unknown
Fixture
Ballast Type:Magnetic
Socket Type:E40
Electrical
Wattage:250
Voltage:110-140V for 230-240V mains
Current:2.13A
Physical/Production
Dimensions:290 x 48mm
Factory Location:Shaw, Oldham
Fabrication Date:August 1965 (Date code 92)

File information

File information

Download: Download this File
Filename:DSC02620.JPG
Album name:sox35 / Mercury Vapour lamps
Keywords:Lamps
File Size:322 KB
Date added:Sep 11, 2019
Dimensions:2464 x 1386 pixels
Displayed:48 times
Date Time:2019:09:02 16:51:58
DateTime Original:2019:09:02 16:51:58
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Exposure Time:1/40 sec
FNumber:f 2.8
Flash:Compulsory Flash, Return light detected
Focal length:5.35 mm
ISO:125
Make:SONY
Model:DSC-W120
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Beta 5
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Sep 11, 2019 at 09:20 AM Author: Beta 5
I've got a few lamps with cracked caps, does anyone know what causes it?

Thorn Beta 5 35W SOX 1965 - 2008. Top entry/Side entry

sox35
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Mainly the electrical side of things


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Oct 21, 2019 at 04:14 PM Author: sox35

I've got a few lamps with cracked caps, does anyone know what causes it?

Not sure, but I fixed it with, believe it or not, Gorilla Glue..! It was a tip from Andy (Photonicinduction)

Ria in Aberdeen
It'll be all right in the end, and if it isn't all right, it isn't the end  Smiley

Danny
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Oct 21, 2019 at 04:39 PM Author: Danny
Age on older lamps and stress on newer is my guess from them being screwed in tight or too tight
Beta 5
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Oct 21, 2019 at 04:52 PM Author: Beta 5
I've found the 55w SOX lamps I got last month have got cracks in the metal collars of the caps (they are modern 2012 made lamps), but I'm not sure if they were there when I received the lamps or if its happened since I got them.

Glad you fixed it Ria I've also used Gorilla glue super glue on several things before and its also really good.

Thorn Beta 5 35W SOX 1965 - 2008. Top entry/Side entry

Mandolin Girl
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Oct 22, 2019 at 10:10 AM Author: Mandolin Girl
We're really good at bodging a fix

Hugs and STUFF Sammi xXx (also in Aberdeen)

There are two kinds of light  -  the glow that illuminates, and the glare that obscures.
James Thurber  -  US author, cartoonist, humourist, & satirist (1894 - 1961)

sox35
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Oct 22, 2019 at 11:47 AM Author: sox35

We're really good at bodging a fix

That we are

Ria in Aberdeen
It'll be all right in the end, and if it isn't all right, it isn't the end  Smiley

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