I have a West Marine Vector II (which I think is the same as the
interphase Pilot II).

Recently its been having trouble finding a signal while sitting in my
slip, though it will usually pick up by the time I get out of the
marina.

PArt of the problem I found was a shoddy wiring job by the previous
owner -- the power wires had unprotected automotive type butt
connectors, which had corroded -- i replaced the entire path.

But, I have also noticed that the way the Coax was originally wired,
it got chaffed in several areas, exposing (in some cases breaking) the
braid.

I want to replace the coax as well, preferabbly all the way back to
the coupler. Does anyone know if it is possible to open up the
antenna coupler, and whether it had a connector or not? Or, does
anyone know where one could find a cheap Loran coupler w/ coax that is
compatible with this model?

Thanks,
Jon B