Confuse on QTB star ground ring terminal

[roger]

Guys,
I'm confuse on the number 16 paragraph step by step of QTB says

16. Crimp and solder the other lead of the .33uf, 400V capacitor to a large or medium ring connector (see figure 2c and 2d). This terminal is where we will attach all signal ground wires for "star" grounding.

Does this terminal is soldered to the back aluminum foil of the pickup? or how do I attach this ring connector at the back?

Thanks
Roger

[ashcatlt]

?The text you've quoted here comes from point 14 in the one I'm looking at. 16 is a whole bunch of other stuff.

Anyway, there's two ring terminals in the instructions. One goes around a pot shaft with one end of the safety capacitor soldered to it. The second gets the other end of the cap and all the signal grounds soldered to it. This second then must be insulated so that it cannot make contact with the shield. Where you put is up to you, but I'd imagine it's placement will be dependent on the the length of your cap's leads.

[pete12345]

Yeah, the 'signal ground' ring connector must be insulated from the shielding. The only connection to the shielding must be through the capacitor.

[roger]

OH, meaning this is floating and not attached to the back of pickup foil?

[clr]

The ring terminal in which you connect all of the ground wires of the circuit on is the only thing "floating". You insulate that with electrical tape.

One ring terminal is under a potentiometer of your choosing to connect the ring terminal previously stated through the film capacitor.

The one you connect in the guitar cavity IS attached to the pickup foil. Which is crimped and soldered to the wire coming from the back of your guitar. (Tremolo ground)

[roger]

Got yah. I'm going to use one big heat tubing on this star ground.

But this one
"The one you connect in the guitar cavity IS attached to the pickup foil. Which is crimped and soldered to the wire coming from the back of your guitar. (Tremolo ground)"
I'm little confused... Sorry i'm slow learner....

Roger

[pete12345]

This wire is nothing to do with signal, it grounds the bridge and strings. Since we want this to be protected from electrical shock (as with any exposed metal) we connect it through the capacitor. You could just connect the wire to the capacitor's lead, but linking it to the shielding is a little neater.

Pete

[clr]

If you look at the back of your guitar, you see there is a wire soldered to the tremolo system in the cavity.

This wire then goes through the body. Connecting this wire to the cavity is optional. You can just connect it to the star ground.

[ashcatlt]

Correct me if I'm wrong, but I think we generally refer to the ring connector where the signal grounds are connected (the one that gets insolated, to which the initial post referred) to be the "star ground," no?

If that is, in fact, the case we certainly do not want to connect the bridge ground there. Not if we're installing the safety capacitor. The most likely point of contact with metal parts on the guitar happens to be connected to that wire. I'd think if we wanted anything to be isolated from potential DC voltage on the amp ground it would be there.

So that wire has to connect to the other side of the safety cap. A good place might be at the other ring terminal which is around the pot shaft. The QTB article has it soldered to a strip which is screwed into the body (and making electrical contact with the cavity shield) simply so you don't have to snip or unsolder the thing every time you take off the pickguard.