Double Bass Full Circle Flimsy Cable---> can it be soldered somehow?

[harrybgoode]

I'm sorry if I'm posting a thread on this very common problem (through the search function I found very old topics dealing erratically with it, nothing so specific), but I need some help!
I bought a full circle pickup on a classified here, and after my luthier replaced the strings and adjusted height of the wheels, I'm having some issues of contact with the white cable. I have to place it very carefully or it won't even amplify the bass!
This is also somehow affecting the sound: it sounded awesome before, now I feel like some frequencies are missing, and it is more prone to feedback than before.
Is there any common trick or way to sort this out without changing the whole unit?
:'( I'm based in Italy so it is difficult for me to ship it to Fishman, and I don't even know if they would repair or replace it.
Please help me out.

(sorry for my very bad english and if I'm reposting something already dealt, but I need help :'( )

 

[DoubleMIDI]

The cable itself is not too bad, at least not as bad as you think.
There are good chances that only one of the wires inside the RCA (?) plug broke.
You can see this almost immediately if you open the plug and bend the cable a little bit. Resoldering usually does the job.
If this is not the case the cable might be broken where it is bend the most, close to the plug (then you can shorten the cable by a few cm and resolver the plug) or close to the wheel (then you might need to open the wheel if it has screws, shorten the cable on this side and resolver the cable. But the second option is a bit dangerous, since the piezo crystals are very heat sensitive and might get destructed electrically if you solder for more than a second.
But in most cases it's a wire inside the plug that got broken unless it is one or several of the piezo crystals that got damaged due to the long pressure (but in this case you would hear at least something).

 

[harrybgoode]

Thank you so much for your prompt answer!!!
I'm pretty sure that it is only the wire that connects to the input jack that is making "false contact"...!
I'm still not able to open the goddamn plug... it seems that it won't open if not by breaking it...

 

[DoubleMIDI]

Mine is a metal RCA plug. You might want to use one or two pliers to screw it open if you cannot turn the parts by hand.
You can always cut the cable and buy a new plug (metal case preferred) and solder that one to the cable if there is no chance to open the old one.
But removing the isolation might be tricky, since the cable is so thin and the isolation might be a bit hard to cut.

You might wiggle the cable at the plug and hold the rest of the cable to avoid wiggling at the adjuster while a string vibrates and you are plugged in into an amp. If the signal comes and goes, it is the contact inside the plug that was broken. Then you know at least where the problem is and what you might be able to do to correct it.