A large Behringer mixer returns with intermittant loss of one or both
channels due to being used outdoors and dust/damp getting on the L&R
Main Insert bypass contacts. As the main inserts are rarely used I
decided to add a pair of captive dustcaps, after replacing the sockets
this time . It just happens the hex "nut" part of F connectors is the
same thread of these metal bushed sockets. 2 part crimp type with a core
barrel and a larger cylinder crimped over, in normal use. Ground off the
inner cylinder and ground a slight slot in the remaining disc, that is
free to rotate in the hex, to take some silicone sleeving. That sleeving
swathed in coloured hotmelt, filling the exposed top part of the disc .
The other sleeve-end knotted to a solder tag using a convenient fixing
screw. Then a disc of rubber cut with leather punch to go inside the hex
, to seal to the top of the socket, on screwing down the hex.