Another look at the integrated saddle/piezo pickup. You’ll most often find these in Takamine guitars but there are variants around. Like this Epiphone pickup. The action needed a little finessing here and this version presented it’s own challenges.
If you've ever had to wire or replace components inside a hollow or semi-hollow guitar, you probably know what a pain it is. You have to fish all the wiring and components through the f-hole to work on them. Even worse, then you have to get them back. It's like building a ship in a bottle but there are some tricks to make things a little less annoying.
So here's the problem:
You’ve got your guitar plugged in. You’re not playing it and there’s a noise. A hum. It’s not terribly pleasant.
Thing is, you touch the strings and it’s gone.
The response: It's ok. It's not a problem. That’s all as it should be. Guitars pick up interference and that comes out the amp as a hum. When you touch the strings, it's supposed to get quieter.
In an electric guitar or bass, it's usually necessary to 'ground' the strings.
By this, I mean that all the strings should have a path to ground — a wire that connects them to a ground point inside the instrument. Usually that ground point will be the back of a pot or the sleeve of the output jack.
When it's properly grounded, you can touch the strings of your guitar and you'll usually hear the background hiss reduce. Yay.
There’s a common misconception that by touching the strings you are grounding the guitar.