The Wayback Machine - https://web.archive.org/web/20200103173115/https://www.bbc.co.uk/rd/publications/rdreport_1946_04

BBC R&D

Abstract

This report is a summary of the results of field trials and laboratory work carried out in the London and Oxford areas with frequency modulation in the 40 - 50 Mc/s and the 90 Mc/s bands. In the 40-50 Mc/s band comparative tests were carried out with amplitude modulation.