I remember reading about PSK in QRZ, which I could afford in those days. As a user of PacTOR I was quite excited about this, so later in the year when I visited the amateur radio show in the UK known as the Leicester Rally I intended to gain some information and buy an opto coupler. I walked all round, asked at various stands about buying a PSK opto coupler and all I got was " What's PSK?" The designer of PSK was unknown to those in Britain.
Kind regards, Mel G0GQK
