[CW] Just something fun for tube hounds...

[Guy Letourneau]

April 1 is long past, but a good EE friend of mine passed these along:

 

http://www.tubecollectors.org/archives/606.pdf

 

https://web.archive.org/web/20120316141638/http://www.national.com/rap/files/datasheet.pdf <https://web.archive.org/web/20120316141638/http:/www.national.com/rap/files/datasheet.pdf>  

 

https://www.edn.com/zener-enhanced-dark-emitting-diodes-zededs-deliver-10x-more-dark-per-watt/ 

 

Enjoy!

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