Does the battery in a JP6 affect pickup strength/power/output?

[Random Hero]

I couldn't work out for ages why my JP sounded so weak today. Until I changed the battery, and it has come to life again. This is referring to the Magnetic Pickups.

I didn't know the circuitry was active other than the Piezo?

 

[Larry]

i didnt think the pickups where active. The only EBMM with the active pickups i though was the The Luke but if it fixed the problem who cares right

 

[Random Hero]

yeh i know bro, i'm just super curious. Is the circuit active rather than the pickups themselves, if that makes sense? It definately has more power, bite, and agression than it did an hour ago though. That's the weird thing.

 

[tommyindelaware]

if the magnetic pickups work w/ the battery removed...then they are not in the circut.........

i don'thave a peizo equipped guitar to look at......

 

[Markdezy]

I'm pretty sure only the Piezo pickup is affected by the battery.

If you start to hear crackling or stuff like that from the piezo pickup, though, it's the battery that's needing changing.

 

[Spudmurphy]

I know nothing about JP's, but I have an AL with a piezo.
If the battery goes flat then the Mag pickups won't be affected - they just lose their "silent circuit capabilities". But the Piezo will not work if the battery is flat.
Hang on let me check ...
Spud eases himself out of the computer "cat bird seat" and goes downstairs to take the battery out of "Albert".......

















sorry I had a beer whilst I was at it !

No difference to the mag output but Piezo (as expected ) didn't work.

Spud

 

[Eilif]

The batteries are used for piezo pickups, silent circuits, and active pickups. Since the JP has humbuckers, the battery can't be for a silent circuit, so it must be for the piezo.

My Axis SS has two jacks. The one for the piezo is affected by the battery. If I have no battery, that jack is totally useless--I will get no sound even from my magnetic pickups. But the other jack (magnetic pickups only) always works regardless of whether I have a battery in the guitar.

If your JP is acting up with the magnetic pickups because of the battery, I'd guess that switching to the other jack (assuming you have two) would cure the problem. Of course, a battery change would do that, too.

The only EBMM with active pickups is the Luke.

 

[Spudmurphy]

T
My Axis SS has two jacks. The one for the piezo is affected by the battery. If I have no battery, that jack is totally useless--I will get no sound even from my magnetic pickups. But the other jack (magnetic pickups only) always works regardless of whether I have a battery in the guitar.

+1
The albert is the same

 

[DaveB]

Hmmmm......

I seem to remember somewhere that with the Axis Piezo one output is straight mag pickups, if you use the other (on its own) and have the selector to mag then you get a buffered magnetic output - which by definition would require a battery to work.

Anyone from EBMM care to confirm.....or if the worst comes to the worst Beej

Dave

 

[SteveB]

I think Eilif and DaveB have nailed it.

 

[Random Hero]

The weirdest thing is, i'm convinced it was happening on the mono output too, not just the stereo.

Hmm, oh well..its working now.

 

[peat]

i had the exact same thing happen

it thought it was my amp playing up

when there is no battery in a piezo jp the guitar will produce no signal
i know the pickups are not active
but with out and dc to power the little box that the jacks plug into, the guitar just makes no signal

this makes me think
are the magnetics preamped at all in that little box
i think we need some verification

 

[zenmba]

I have a JP7 w/piezo. As stated earlier, when the battery needs replacement the piezo setting starts to "crackle" or much produces a much lower volume. I have never noticed a changed to the magnetic pickups.

One tip, again this may have been stated earlier, is to unplug your cable to save the battery - much like you would with a stomp box.

 

[beej]

Any pre-amp that mixes mag and piezo signals is going to be affected by battery voltage (the mags go through a unity gain buffer so they can be mixed into the signal). So this sounds right that they're affected on the mixed output.

 

[beej]

Anyone from EBMM care to confirm.....or if the worst comes to the worst Beej

 

[Random Hero]

i had the exact same thing happen

it thought it was my amp playing up

when there is no battery in a piezo jp the guitar will produce no signal
i know the pickups are not active
but with out and dc to power the little box that the jacks plug into, the guitar just makes no signal

this makes me think
are the magnetics preamped at all in that little box
i think we need some verification

Yes! Someone else!

It's that little box that both jacks are in, both outputs must be linked to the battery somehow. Then again, peat and I could just be very wrong, and both retarded.

I always unplug my lead, however, the duracell battery died on me.

 

[jeffrey]

I got two JP7's (an 02 and an 05) and I haven't had a battery in the 02 for about four years (took it out after it went dead the first time and never replaced it).

When I got the 05 I put the battery in my Wah.

So that being said, I don't think they have anything to do with the magnetic pickups.

 

[Random Hero]

hmm, mixed responses here.

 

[jeffrey]

I really don't think it makes a difference at all. I'd have probably noticed in 4 years, ya think?

 

[peat]

yeh

random hero
take the battery out
plug into the top jack
the guitar makes no sound in any setting

take the battery out
plug into the bottom jack
the magnetics work fine, but no piezo

so the upper jack (mono) cannot function without the battery
as they say because the signals are mixed together down that path