About Charlie Portman
(From his talk at the Science Museum 1900 Seminar- May 1996)
• Electronic Engineer
• Circuit Development
- Magnetic Drums, read/write circuits, servo-amplifiers
• Logic Designer
- drum test equipment, Newt, Sinus
• Team Leader
- drum subsystem commissioning
• Development Laboratory Manager
- 1904/5/9,1906/7 and 1904/5 E/F
I graduated from
I spent some time designing circuits to record on and read back data from the drum and to synchronise the rotation of the drum to the computer which it was going to work with.
During this time the need to automate the testing of drums led me into logic design, first on test equipment (using valve circuits) then on transistor based machines – Newt, Sirius and Orion.
I became Manager of the 1900 Development Laboratory charged with developing the 1904,5 and 9 machines derived from Ferranti-Packard's FP6000.
We went on to develop 1906 and 7 and then the 1904E and its variants.
We also created the dual 4E known as the 6E and a paged version of the 4E
which was used at