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G3NPC England flag England

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Retired EE professor in the University of London.

First licensed in 1957(or was it 1956?).

Publicity Officer of Dorking and District Radio Society(DDRS).

Member of Surrey Radio Contact Club(SRCC) and the Radio Society of Great Britain(RSGB).

Current radio interests include phased array antennas for hf; antenna measurements; 3 dimensional antenna pattern measurements.



In WAB square: TQ25,  at locator  IO91vh.

About 30kms S of London.

168m above sea level on Epsom Downs the home of the famous horse racing course. The Downs have a chalk sub-strata.

This is a relatively high location overlooking London with good signal take-off in all directions.



​Home made 4-square for 21MHz

60m inverted L at 10m with a remote antenna tuner from 2-30MHz

Rotatable 4 element quad for 2m.



The Ground Mounted Quarter Wave Vertical Antenna - RADCOM, 87, (07), July 2011, pp 60-64

A clear result of this experimental work is that the optimum number of quarter wavelength radials for a 21MHz monopole is 13, nothing is to be gained by using more. 



A 21MHz Four Square Beam Antenna - QST, Sept 2013, pp 33-40

A 21MHz Four Square Beam Antenna - QEX, Sept/Oct 2013, pp 3-12



                          The angular response of the 4-square for its four beam headings.





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