So after some advice from the hood people on these pages I’m going to convert the RCA plugs on my Rega P6/Ania to BNC to fit my Nac 72.
I had some 50ohm Items knocking around which were rated for RG179 wire gauge. This is way to thin (looks to be about 0.5mm or so) so am wondering if the best way forward is to snip the RCA conector off the Rega leads, strip it back and then measure the core so I’ll have an accurate idea of the width to go for in the BNC…if I can find a good conversion table!
I fitted BNCs to replace phonos using standard RG58 BNCs, these fitted well enough and I was able to get the centre conductor, in its insulator, to fit inside the metal ‘top hat’ piece that the shield connects to.
It is indeed, terminating with 50 ohm terminators will lead to a sub optimal/poor performance cable… depending on application introducing losses and/or reflections.
Just in case there’s any confusion here, the BNC sockets used for the Phono inputs on Naim pre-amps and phono stages are 50 ohm, therefore you should use 50 ohm BNC plugs.