• Please review our updated Terms and Rules here
  • From now on we will require that a prefix is set for any items in the sales area. We have created regions and locations for this. We also require that you select a delivery option before posting your listing. This will hopefully help us streamline the things that get listed for sales here and help local people better advertise their items, especially for local only sales. New sales rules are also coming, so stay tuned.

Vintage SAGE Computer Dumont K1303 Photomultiplier Vacuum Tube from Light Gun - free

cclaunch

Member
Joined
Jul 16, 2018
Messages
40
NO LONGER AVAILABLE

The IBM SAGE air defense system made use of 'light gun's that allowed a radar operator to point and select a particular blip on the screen, indicating to the SAGE (AN/FSQ-7) computer that this is a target for further tracking and processing. Inside the handheld gun as this tiny photomultiplier tube which would detect the light emitted by the section of the display screen where it was pointed, thus combining this with awareness of the horizontal and vertical scan timing would give the position on the screen.

Own a bit of first generation computer technology from the very innovative SAGE system which was a building sized system, 22,000 square feet in area, implemented with vacuum tubes for its logic and very early magnetic core memory.

Photo of the SAGE console courtesy of Ed Thelen

Will send anywhere in the US by USPS Priority Mail Small Flat Rate Box
 

Attachments

  • photo61619.jpg
    photo61619.jpg
    247.5 KB · Views: 1
  • photo61620.jpg
    photo61620.jpg
    248.9 KB · Views: 1
  • photo61621.jpg
    photo61621.jpg
    42.2 KB · Views: 1
Last edited:
Hi,

I am interested in the Photomultiplier Vacuum Tube, If you still have it?

Thanks
Bobby
 
Back
Top