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GEC CP/57 Twin-Filament Studio Halogen lamp

GEC CP/57 Twin-Filament Studio Halogen lamp

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A novel invention which was introduced in 1967 to coincide with the start of colour television broadcasts in Britain, this early hardglass halogen lamp features two filaments which allowed it to be dimmed with reduced variation in colour temperature vs normal studio halogen lamps. See http://www.lamptech.co.uk/Spec%20Sheets/TH%20SE%20P%20GEC%20CP57.htm

IN_WC_GEC_240-40T65OP-BC_Accent.jpg IN_WC_GEC_240-100PS60CL-BC_Single_Support.jpg TH_SE_P_GEC_CP57.jpg IN_WC_DuroTest_120-65G30IRC-E26_side.jpg

Light Information

Light Information

Manufacturer:Osram-GEC
Model Reference:CP/57
Lamp
Lamp Type:Studio Halogen
Filament/Radiator Type:2x C-13
Base:G38q
Shape/Finish:G150
Service Life:100h
Fixture
Fixture Type:Kahoutek
Electrical
Wattage:2500W + 1250W
Voltage:240V
Optical
Lumen Output:26k / 55k / 86k lumens
Color Temperature:3200K
Color Rendering Index:100
Physical/Production
Factory Location:http://www.lamptech.co.uk/Documents/Factory%20-%20UK%20-%20Wembley.htm
Fabrication Date:1977
Application/Use:TV Studio

File information

File information

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Album name:James / Incandescent
Keywords:Lamps
File Size:128 KB
Date added:Aug 17, 2014
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sailormoon_01_uk
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Aug 17, 2014 at 03:59 AM Author: sailormoon_01_uk
I think these Lamps are Cool, I have a Later Osram-GEC CP22 1250/1250 watt Glass Tungsten Halogen Lamp with Flexi-Pins, see HERE and a Thorn CP32 2500/2500w Halogen Lamp with Quartz Bulb see HERE.

I guess this was the type of lamp which had issues due to having ridged pins and exploded example the type of lamp which exploded during a live broadcast of the BBC's 9 o'clock news, showering the reporter Jan Leeming, with fragments of hot glass! for Video Clip of the News see HERE
James
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Aug 17, 2014 at 04:02 AM Author: James
Yes Colin you're right. All hell broke loose in the corridors of power at GEC the morning after that happened, and the Flexi-pin base was swiftly introduced to overcome the problems!
sailormoon_01_uk
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Aug 17, 2014 at 04:06 AM Author: sailormoon_01_uk
I could imagine it, and at least Osram-GEC infact took swift action to make their Studio Lamps safe. It's a shame that all the big British Lamp manufacturers have now gone into the History Books.
Globe Collector
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Preserving the Brightest Ideas of Our Age


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Aug 20, 2014 at 03:30 AM Author: Globe Collector
Our ABC TV used these here and I have good examples of both the CP/22 and CP/20 with two 2.5Kw planes both the rigid pin variety. I also have a flexi-pin CP/20, which I "
botted" out of the ABC when I appeared on one of their TV productions about five years back.

I remember these rigid pin lamps, our studio bought a whole load of them in about 1976. Quite a few broke, some the heterogenious glass plate cracked with cracks radiating out from the seals, in others the bulb simply "ringd off" cracking neatly between the base plate and the bulb rim. So they were a "bit of a lemon". After a string of failures the remaining lamps were shelved but not before a few samples made it into my collection. Eventually they were sold at auction and a local theatrical lighting business bought them and tried to convert them to G38 from GX38q and destroyed most of them in the process. I only found out later and all I got was some pieces of tungsten pin. There can't be very many about now.

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

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Robert


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Aug 20, 2014 at 05:30 AM Author: rjluna2
Wow, this specimen must be a really rare bird out there

Pretty, please no more Chinese failure.

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