Silicon LED ?

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** See ABSE  for pics of a silicon NPN transistor chip emitting light.

No trickery involved.

The type is a 2N3439  ( high voltage NPN in TO5 pack)




.....   Phil



Re: Silicon LED ?
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We used to cut the lid off BC108 transitors and see purple light (way
way way before blue LEDs came on the scene) this would be 35 years ago.

Mik

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