Author Topic: Philips 55w SOX PSG how do i tell if its lost vacuum  (Read 68 times)
Danny
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Philips 55w SOX PSG how do i tell if its lost vacuum « on: September 08, 2019, 03:42:02 PM » Author: Danny
I have a Blue Cap Philips 55w SOX (low pressure sodium lamp) without the getter coating.

Can anyone here tell me how i can tell if it has lost vacuum in the outer jacket at all? Is there anything that changes in the lamp? As i say there is no getter in these lamps to tell
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dor123
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Re: Philips 55w SOX PSG how do i tell if its lost vacuum « Reply #1 on: September 08, 2019, 07:54:02 PM » Author: dor123
This is a SOX-PSG with a solid state getter (The small square pellet), instead of the barium getter.
When a lamp with the usual barium getter, losing vacuum in the outer, the getter turns white.
« Last Edit: September 08, 2019, 07:55:37 PM by dor123 » Logged

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Re: Philips 55w SOX PSG how do i tell if its lost vacuum « Reply #2 on: September 08, 2019, 09:42:23 PM » Author: HomeBrewLamps
Does the pellet change color at all?
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