Making sense of the 9 pin jack.

[Pauleo1214]

I am building an electronic acoustic that uses a L.R. Baggs preamp with a piezo and a active pickup.

I will be using two 9V batteries to power the thing. Where I stopped in my tracks is where to connect the negative terminal of the second battery powering the pickup.

The preamp has positive and negative terminals for 9 volt power. However it all goes to a 9 pin jack with no explanation of what wires make what connection to the jack. The jack came pre-wired with the preamp and it looks like the ring is wired for stereo operation. So where do I put the second negative battery wire to avoid drainage?

Here are the power wires for the preamp.


Here is the jack.


And feel link to the manual.

L.R. Baggs Ctrl-X: Installation Manual & User's Guide https://lr-baggs.squarespace.com/s/lr-baggs-control-x-install-manual-user-guide.pdf

Thank you!

 

[xefned]

Two 9v batteries in series to get 18v.
(Hopefully I'm getting at what you're asking.)

Only one of these two connections needs to go to the ring to break the circuit when the jack is pulled, almost always the negative. In other words, the wire between the two batteries is always unbroken.

 

[Pauleo1214]

Two 9v batteries in series to get 18v.
(Hopefully I'm getting at what you're asking.)

Only one of these two connections needs to go to the ring to break the circuit when the jack is pulled, almost always the negative.

View attachment 65244

I was hoping to connect two in parallel but I suppose doing it in series solves my problem too!

 

[giovanni]

If the preamp works with 18V that works. But if it doesn’t or you prefer 9V, you can connect the two batteries to each other (+ to + and - to -) and then connect just one of the +/- pins to the board.

 

[xefned]

I was hoping to connect two in parallel but I suppose doing it in series solves my problem too!

Oh, whoops, I assumed that 2 batteries meant it was an 18v system. My bad.

In that case, Giovanni's advice above is correct. You only have 2 wires to connect, and they go straight to the preamp board.

 

[Pauleo1214]

The 18 volt works. I might change to Giovanni's solution. The gpcb tone tweq I have in there has a 10v 47uf cap. Unless I change that.

 

[xefned]

Cool man. Enjoy that sweet piezo sound. Reading that manual gave me a bit of FOMO.

 

[Pauleo1214]

Cool man. Enjoy that sweet piezo sound. Reading that manual gave me a bit of FOMO.

Thanks again to you and @giovanni ! I feel bad for not thinking of the obvious answers first!

No need for FOMO on piezo. There are a lot of ways to skin a cat and since you build pedals, you have a headstart.

 

[Pauleo1214]

Done!

 

[xefned]

That's just beautiful. I hope we see it in a tone demo one day.

Nice meower too.

 

[Pauleo1214]

That's just beautiful. I hope we see it in a tone demo one day.

Nice meower too.

I'll try to have a demo soon; having trouble mixing what I recorded because of clipping! Hopefully it will do.

I can always send this to @jjjimi84 if he wants to shill.

 

[Aentons]

What is that neck pickup?

 

[Pauleo1214]

What is that neck pickup?

EMG 89.

 

[Pauleo1214]

That's just beautiful. I hope we see it in a tone demo one day.

Nice meower too.

Here's a hack job of a demo. I had issues mastering and could not nail down the timing for the life of me.

https://soundcloud.com/paul-eliasson%2Fgypsy-acoustic