De­sign­ing the Post Of­fice’s first modem

Computer Active (UK) - - Letters -

As one of your older read­ers, my me­mories of teleprint­ers and Telex are very real (‘What­ever hap­pened to Telex?’, Is­sue 502, page 69). Fifty-two years ago, I think, I de­signed the first modem for the Post Of­fice, in pre-bt days. It worked at 600 Baud (bits per sec­ond) at a time when tran­sis­tors were first be­ing recog­nised as re­li­able.

I also de­signed one for the mil­i­tary that worked at 1500 Baud. I had joined the Army as a Gun­ner, but then be­came a radar tech­ni­cian. So be­gan a ca­reer in elec­tron­ics af­ter the war. Thanks for the me­mories!

Harold Faulkner

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