antique discharge lamps

Here you can see my collection of my "most precious gas discharge lamps. There are a few very early beehive neons with evecuation tip, some very early HPM lamp and some medium pressure Mercury lamps from Germany, England, the Netherlands and America.

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Comment 1 to 6 of 6

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Kev

[07 Apr, 2025 at 07:57 PM]

A lot of MA lamps.

Andy

[07 Apr, 2025 at 10:14 PM]

That’s a beautiful display Alex! Some individual photos of those lamps would also be great to see. Cool

dor123

[08 Apr, 2025 at 09:14 AM]

Strange that in the GE H-2 with the bare arctube, the frame wire passing inside the arctube without melting when the lamp is hot.

Alex

[08 Apr, 2025 at 11:24 AM]

why should it melt? The as discharge is not hot enough. Before the wire melts the glas would likely fail.

Andy

[08 Apr, 2025 at 10:45 PM]

Yes, I’m not sure just how hot Dor thinks the arc gets. It’s a lamp not a blast furnace!

Alex

[09 Apr, 2025 at 06:51 PM]

Yes, with this lamp p_v is rather low. Maybe in some highly loaded short arc lamps p_v becomes high enough to melt steel wire, but even there i am uncertain.

However it is certainly possible to melt metals with an arc as it is done in arc furnaces.

p_v is the power dispication per unit of volume:
p_v=E*S
E: Electric field [E]=V/m
S: current density field [S]=A/m^2
[p_v]=W/cm^3

Comment 1 to 6 of 6

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