Experiment ended

My N817 test ended this morning, and this is the result of one start and 2174 hrs in 90 days!, you can see how much emitter is still on the cathodes though, even after 2000+ run hours, when their not being started every night!
This batch has now been tested 3 different ways, and the conclusion is they are indeed a manufacturing fault!

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Comment 1 to 8 of 8

Page: 1

Danny

[23 Aug, 2021 at 08:28 PM]

90 days! Worst lamp of the whole batch surely

AngryHorse

[23 Aug, 2021 at 08:46 PM]

Possibly?

dor123

[05 Jul, 2026 at 02:32 PM]

What happened to the lamp? What is the brown coating at the outerbulb?

AngryHorse

[06 Jul, 2026 at 07:58 AM]

I can only assume it was a fault in the infrared coating, the whole batch would do this within the first year!

FrontSideBus

[06 Jul, 2026 at 03:05 PM]

Interesting! I think my Osrams always failed and leaked around one of the electrode seals.

Danny

[06 Jul, 2026 at 06:58 PM]

Yeah I tested 2 of richs batch osrams and they did the same for me. Tested one of my batch and it failed in the normal way

dor123

[07 Jul, 2026 at 08:25 AM]

I think that this is a premature failure caused by electrolysis effects.

Ash

[09 Jul, 2026 at 07:55 AM]

Could it be possible to try to blow off the part of the coating that shorts in a new lamp with a magnetron ?

Comment 1 to 8 of 8

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