Early lamps without vacuum jacket

Lamps without termo-insulation jackets

File information
Filename:	IMG_20220525_163538.jpg
Album name:	SilverRay / Low pressure sodium lamps
Manufacturer:	MELZ
Type/Model:	DNaO
Wattage:	140 and 85\|140
Date manufactured:	1938
Filesize:	1173 KiB
Date added:	29 May, 2022
Dimensions:	2080 x 1135 pixels
Displayed:	444 times
URL:	http://80.229.24.59:9232/gallery/displayimage.php?pid=18115
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Comment 1 to 2 of 2

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AngryHorse

[30 May, 2022 at 06:27 PM]

These are interesting as their like SO and SOI combined Cool

I wonder how common the LPS lamp was in Russia?, they must have been pretty widespread for them to have a production line for them?

SilverRay

[30 May, 2022 at 07:19 PM]

Unfortunately no. LPS lamps left unknown in Russia practicaly. Except the one experiment in 1938 with LPS street lighting the lamp type DNaO 140 is the only one LPS lamp in Russia. And this lamp is rare too although there were some types of fixtures for this LPS type and LPS + HPM lamps together

Comment 1 to 2 of 2

Page: 1