Leica_man, I too owned Randall Research cables about that time. Do I remember the full name was Randall Research Symmetrical TX?
I had issues with their unshielded design. Two different radio stations came through my turntable unless they were "dressed" just so. Not an easy task as these were inflexible and the RCA terminations would fail, even if slightly abused.
Before Randall Research I used Peterson Engineering cables. Ken Peterson basically bought surplus aircraft coax and terminated it with high quality ends. That was in the 1970's when this was a foreign concept to most audiophiles.