[Vintage_RC]

It was nearly 50 years ago that I was working there and I'm afraid the details are rather vague in my memory now. I remember that each channel occupied a twisted pair in the cable (you saw the receiver cable being plugged into the BR socket), this meant the system was very limited as the maximum number of channels was limited by the cable. I seem to remember the frequency used was somewhere in the 4MHz region and I recall there were problems with the colour sub carrier frequency. One engineer was working on a VHF system when I left but I have no idea if it was ever implemented.