Re: Jack socket for SR-500 bass.
Still wondering how these sockets are 'switched' inside and it occurred to me that they might not have ACTUAL 'switching' contacts inside - ie they do not have an actual moving contact that's pushed in to contact with another one when the plug is inserted - but instead might simply be 'stereo' sockets which have the usual three terminals - the earth sleeve, a mid-contact and then the end tip.
What could then happen is that the main earth sleeve and the mid contact are effectively connected together by the plug's main metal pin (which is mono), thereby turning on the power (possibly via the earth -ve battery terminal rather than the more usual +ve), and that leaves the socket 'tip' pin to do its normal 'signal' job.
Does that make sense? If so, then there is nothing 'special' about these sockets - they are simply 'stereo' sockets and don't have moving switching contacts inside.
Anyone know if this is correct? Thanks.