> Part number: CL1384
>
> In the UK:
>
> http://www.rapidonline.com/Cables-Connectors/Connectors-Audio-Vide
> o/Jack/3.5mm-Mono-PCB-jack-socket/63491/kw/cliff
>
> In the USA:
>
> http://www.cliffusa.com/content.asp PID=7&Page=2

We don't use the CL1384 but the CL13841. There are some mechanical
differences (slightly other dimensions) and the CL13841 has so-called
"curly" contacts for a better contact. As far as I remember the CL1384 is
the old version of the socket. We do not use it since many years because of
the contact problems.

Best wishes
Dieter Doepfer