Black Nylon string problem

[BassBus]

I don't know if this is the right place for this problem but here goes. I've just put a set of black nylon strings onto my Spectorcore fretless. A, D, and G strings sound fine through the piezo pup but the E string has a marked drop in volume. Strange thing is when I put my finger on the string over the piezo it returns to normal. Sound is fine through the mag pup. Tried putting the old half wound E back on and no problem. It sounds to me like the nylon string is not conecting with the piezo properly. Any ideas would be welcome.

[BassBus]

bump

[BassBus]

One last bump

[DavidMP]

It seems that the string is not sitting right on the bridge saddle. My guess would be that the girth of the string is larger than what the groove is; if that is the case you can
a) increase the break angle by making the E string go though the body, if possible
b) file the groove larger but you might damage the piezo element in the saddle depending on the bridge design
c) build up the groove or make a close fitting cap with some hard material

[BassBus]

Thanks for the info. Will look into it.

[Frankjohnson]

OR

I had a similar problem........

the Piezo under the saddle is not making the correct contact with the saddle.

pull them and check that a shim is not stealign away that direct contact. A slight bend to the metal strip may restore contact if needed. I would do this before filing ANYTHING.

take a look, it is free and reversible if needed.

[BassBus]

That sounds possible. I have tried putting a small piece of aluminium foil under the string and that has helped a lot. I am aware these strings have a lower tension than regular strings so your suggestion may work. Thanks.