Return to the thumbnail page Display/hide file information See previous file See next file

Osram 250W MA/V Lamp

Osram 250W MA/V Lamp

Click to view full size image

Here is a lamp that I have been trying to obtain for well over 30 years. It is an Osram-GEC MA/V Medium Pressure mercury lamp, probably one of the last to be produced before they were dropped in favour of the quartz tubed MB type. This particular example is an ex-military lamp, as evidenced by the NATO stock number on cap and box, as well as the broad arrow symbol. Interestingly, the seller I bought it from told me that he got several of them from the store room of the old John Player cigarette factory in Nottingham when it closed. How it ended up there is a mystery..! Also, an unusual feature of this particular lamp is that the starting electrode and resistors are at the top end of the lamp rather than the cap end, I have not seen this before.

20190910_183506.jpg DSC02615.JPG DSC02617.JPG DSC02619.JPG

Light Information

Light Information

Manufacturer:Osram 250W MA/V Lamp
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:DSC02617.JPG
Album name:sox35 / Mercury Vapour lamps
Rating (1 votes):
Keywords:Lamps
File Size:434 KB
Date added:Sep 11, 2019
Dimensions:2464 x 1386 pixels
Displayed:69 times
Date Time:2019:09:02 16:50:43
DateTime Original:2019:09:02 16:50:43
Exposure Bias:0 EV
Exposure Time:1/40 sec
FNumber:f 2.8
Flash:No Flash
Focal length:5.35 mm
ISO:320
Make:SONY
Model:DSC-W120
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-164290
Favorites:Add to Favorites
Comments
Beta 5
Jr. Member
**
Offline

Gender: Male
Posts: 98
View Gallery


View Profile Personal Message (Offline)
Sep 11, 2019 at 09:19 AM Author: Beta 5
Nice lamp I like the simple design of the packaging.

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

Fluorescent05
Full Member
***
Offline

Gender: Male
Posts: 138
View Gallery

Zack


View Profile Personal Message (Offline)
Sep 11, 2019 at 09:27 AM Author: Fluorescent05
Nice! Do you have a ballast for it?

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

sox35
Hero Member
*****
Offline

Gender: Female
Posts: 1048
View Gallery

Mainly the electrical side of things


View Profile Personal Message (Offline)
Sep 11, 2019 at 09:28 AM Author: sox35

Nice! Do you have a ballast for it?

Yes, it runs off a standard 250W magnetic ballast, we have simpler circuits here with our higher mains voltage..! There are a couple of photos of it lit here as well.

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

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 290
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Sep 11, 2019 at 09:48 AM Author: rjluna2
Nice to see you got one after all these years

Pretty, please no more Chinese failure.

sox35
Hero Member
*****
Offline

Gender: Female
Posts: 1048
View Gallery

Mainly the electrical side of things


View Profile Personal Message (Offline)
Sep 12, 2019 at 06:42 AM Author: sox35

Nice to see you got one after all these years

Hi Robert, thanks for the welcome back, by the way
Yes it took a while..! The only problem is the cap is ever so slightly loose, there appears to be a crack in the metal, so I have to be careful screwing it into the holder. It does work though, and gives a wonderful light

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

arcblue
Full Member
***
Offline

Posts: 174
View Gallery


View Profile Personal Message (Offline)
Sep 13, 2019 at 01:04 PM Author: arcblue
Beautiful lamp! Is it possible this is a lamp for base down operation, thus the starting electrode on the opposite end than most MA lamps?

I'm lampin...

sox35
Hero Member
*****
Offline

Gender: Female
Posts: 1048
View Gallery

Mainly the electrical side of things


View Profile Personal Message (Offline)
Sep 13, 2019 at 01:07 PM Author: sox35

Beautiful lamp! Is it possible this is a lamp for base down operation, thus the starting electrode on the opposite end than most MA lamps?

I don't think so, because it's specifically labelled on both box and etch that it's MA/V which signifies base up. A lamp designed for base down is labelled /D. MA/D lamps were made, but I've never come across one. Not sure why the starting electrode is on the other end, but the pip seal on the arc tube is at the cap end, where it is on all other lamps of this type I've seen.

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

HomeBrewLamps
Hero Member
*****
Offline

Gender: Male
Posts: 1468
View Gallery


SodiumVapor 105843202020668111118 UCpGClK_9OH8N4QkD1fp-jNw majorpayne1226
View Profile Personal Message (Offline)
Sep 13, 2019 at 01:29 PM Author: HomeBrewLamps
Awesome lamp

~Owen

Mercury Vapor LampHigh Pressure Sodium Scavenger, Urban Explorer, Lighting Enthusiast and Creator of homebrewlamps Cool High Pressure SodiumMercury Vapor Lamp

© 2005-2019 Lighting-Gallery.net | Powered by: Coppermine Photo Gallery