[GreenKeys] [External] Vacuum tubes in TTY power supply

[Jones, Douglas W]

From: Nick [creativegardening at hotmail.com] Sunday, June 16, 2019 5:16 PM

>  I have seen a picture about a year ago (or was it a YouTube video, can't remember) of several blue illuminated vacuum tubes inside of a teletype power supply / rectifier.

Cooper-Hewett Mercury arc rectifier tubes glowed intensely in thee ultraviolet, with a fair amount of spillover into the blue.  Glorious things.

                Doug Jones
                jones at cs.uiowa.edu