Hi,
I've read it... but seems that the ruby wasn't homemade... just circuit and lamps... assembly was homemade diy project.
The magazine talk about "popular ruby size" 2 inches * 1/4 inch diameter ruby ...available... and also other kind of crystals for the infrared emission... but that means there were dealers of that stuff in the 60's in the US ???
I know that making synth ruby is not so difficault using right things... oven etc and some "ruby seed" for the crystal growing... but really wonder that in the US there was a market of amateur laser rubys in the 60's !
Or maybe I don't understand well what's in the article ? Really puzzled now!
Kind regards,
Max