"Reading your May letters page, I was very pleased to see a missive from Ivor Catt. He comments on censorship, "publishable" material and other suppressed theories. He is, of course, right; as he always was. Way back when, in the real Wireless World, he outlined conundrums and puzzles which sat me back on my haunches, as he was clearly right and his thinking and reasoning was obviously on the right track. Questioning my night school tutors, I was never given answers, but told to read my text books; I never got reasoning a-la-Catt.

"....

"Ivor, for god's sake, start writing letters to EW+WW again; I miss your openness and frankness."

Peter Thornton G6NGR

Oldham, Lancashire

Electronics World +

Wireless World, July 1995, p594

[oct98. I cannot get to Thornton to say that the current editor of EW+WW will not publish anything by me.]

Copyright Ivor Catt 1995

British Library Cataloguing in Publication Data

Catt, Ivor

Electromagnetics 1

I. Title

537

ISBN: 0 906340 10 1

6.80

In Cambridge in the 1950's, when Ivor Catt studied Engineering, electricity hardly figured in the syllabus.

In 1959, while working in Manchester on noise problems in the first transistorised (and therefore lower voltage, higher current) computer, the Ferranti Sirius, Catt came upon the new, unfamiliar, inductively induced noise - as opposed to the traditional capacitively induced interference of Ferranti's prevous thermionic valve computers, Mercury and Pegasus. He pursued these problems when he pioneered the interconnection of high speed ( 1 nsec ) logic gates at Motorola, Phoenix, in 1964, leading to his major paper on the subject, ref. 15. At Motorola he was fortunate to be able to buy the Tektronix 661 sampling oscilloscope with 4S1 and 4S2 (100 psec) plug-ins, and also the E-H 125 pulse generator with its 10v, 150psec risetime step into 50W. This replaced his earlier fast, but too low repetition rate, Tektronix 109 Reed Relay pulse generator, which however had given insights of another kind (p28).

 

Westfields Press,

121 Westfields,

St. Albans AL3 4JR,

England 1995

Continued