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== Biographical ==
While still a child Robert Penfold started by experimenting with amateur radio and, moving on to designing and building his own designs. whileHis stillfirst aarticle childwas published in [https://en.wikipedia.org/wiki/Practical_Wireless ByPractical Wireless] in 1971<ref>[http://www.americanradiohistory.com/Archive-Practical/Wireless/70s/PW-1971-09.pdf Mini-Amplifier] by R. A. Penfold, Practical Wireless, Sept. 1971, p. 422</ref> and by the time he was 18 he was having articles published regularly in electronics magazines. Editors have also published his articles under pseudonyms such as A. P. Roberts, The Prof and M. V. Hastings. The author J. W. Penfold is his brother. His first book, ''Solid State Short Wave Receivers for Beginners'' was published by [[Bernard Babani (publishing) Ltd|Bernard Babani]] in October 1976.<ref name="mmag">Bob Penfold Interview, Electronics – The Maplin Magazine, Oct 1991, pp. 40-43</ref> He retired from writing profesionally in September 2017.<ref>[http://www.epe-magazine.co.uk/proj/0917.html A summary of this month's contents], Everyday Practical Electronics Magazine, September 2017</ref>
His other interests include collecting and using cameras - particularly Russian ones, macro photography, astronomy, portraiture and landscape painting in both oils and pastels, rearing butterflies and listening to and playing music.<ref name="mmag"/>
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