electron Tube Data sheets
	Friden 1112

This is what's left of my Friden 1112. I took it apart a very long time ago to use the case for a micro processor system. I should not have done that;-) For half the boards I drew the schematics. Maybe someday I will finish it...
For some more info about this machine, see: The Old Calculator Museum or Calcuseum
	main frame	circuit
	board 1	circuit
	board 2	circuit
	board 3	circuit
	board 4	same as 3
	board 5	circuit
	board 6	circuit
	board 7	circuit
	board 8	circuit
	board 9	tbd
	board 10	tbd
	board 11	tbd
	board 12	tbd
	board 13	tbd
	board 14	tbd
	board 15	tbd