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Philips HP 75 watt

Philips HP 75 watt

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Extremely rare mercury high pressure lamp

G_16_MELZ_SVDSh250-2.jpg F_006_(0)_Philips_HP300.jpg F_006_(3).jpg F_013_Osram__HQS_250W.jpg

Light Information

Light Information

Manufacturer:Philips
Lamp
Lamp Type:HP
Base:special
Electrical
Wattage:75

File information

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Filename:F_006_(3).jpg
Album name:Trianero2012 / Mercury lamps
Keywords:Lamps
File Size:176 KB
Date added:Aug 21, 2012
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dor123
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Aug 21, 2012 at 04:06 AM Author: dor123
This lamp looks like it don't have a starting electrode, but a starting wire, similar to the one of penning high pressure sodium retrofit lamps for mercury lamps.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

Trianero2012
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Aug 21, 2012 at 05:02 AM Author: Trianero2012
Yes, this principle is much more older than whichever HPS lamp
Andy
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Aug 21, 2012 at 05:10 AM Author: Andy
Wow! This is a very interesting old lamp.

I'm always interested in trading lamps - message me to see what we can do! Smiley

dor123
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Aug 21, 2012 at 06:29 AM Author: dor123
Trianero2012: The penning HPS lamps, which are retrofits for mercury lamps in their ballasts, uses a starting spiral wire exactly like here (In addition to a neon-argon penning instead of xenon).
But to prevent sodium loss, in penning HPS lamps, this starting spiral wire is disconnected by a bi-metal switch when hot, which result in a 2-3 cooling down period, when the lamp don't receive any voltage until that bi-metal switch cool down and close and the arctube strikes abruptly, without any hot restrike glow.
Your lamp have the starting spiral wire permanently connected, because this is a mercury lamp, not a sodium lamp, so its hot restrike should have a glow in the arctube before it hot restrikes, unlike the penning HPS lamps.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

Trianero2012
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Aug 21, 2012 at 07:19 AM Author: Trianero2012
Dear dort123 - I donĀ“t need any explanation about light sources - it maybe useful for other young boys. I make a collection for more than 50 years, I read all patents around he world about light sources and I do know all development workers in main factories, includind people, who are dead. I was directly presented in factory, if sodium lamps with Penning mixtures was developed. Thank you for a comment. In future do you can look at my samples, from my collection - containing more than 11000 pieces of lamps.




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Aug 26, 2012 at 10:10 AM Author:
Trianero2012 , You have some very lovely very unusual interesting lamps. This mercury lamp is beautiful. I have seen this principle of an external wire starting electrode around the arc tube before on mercury lamps. I have some Thorn 40 watt mercury lamps used for mine lighting. These were used with compressed air driven generators. They too have a spial-wire around the arc tube for starting like this (although these are not old , they are from early 80s).

Looking forward to seeing more of your lamps!
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