Pickup building helps

[ubaid88]

I haven't checked out the Spanish or Portuguese language wiki pages on pickups but I imagine they exist to some extent.

Sorry for my bad English and typing mistakes.
I am Pakistani not Spanish or Portuguese

[madialex]

Sorry for my bad English and typing mistakes.
I am Pakistani not Spanish or Portuguese

No Need to Apologize Brother, your native tounge is not English so no need to say I am sorry about it.

[David King]

Hey I have no idea why I thought you were from South America, my bad.
Well the Urdu pickupedia is going to take a while so I'm glad your English is as good as it is. Did we figure out what the pickup issue was yet?

Ok I saw that link in your first post to a Spanish language article, that's why I thought you might want a Spanish wiki, silly me.

[ubaid88]

Hey fellows,
For passive pickup we usually need 4000-10000 turns.

But how hows much turns do we need for active pickups ?
And where the battery must be connected if we are directly connecting the pickup to input jack, in hot or earth ?

[David Schwab]

Hey fellows,
For passive pickup we usually need 4000-10000 turns.
But how hows much turns do we need for passive pickups ? And where the battery must be connected if we are directly connecting the pickup to input jack, in hot or earth ?

I assume you meant active pickups. Active pickups use a battery operated amplifier circuit, it's not just a battery attached to the pickup.

How many turns you use depends on the sound you want to get. You can wind them just like passive pickups if that's the tone you are going for.

[ubaid88]

I assume you meant active pickups. Active pickups use a battery operated amplifier circuit, it's not just a battery attached to the pickup.

How many turns you use depends on the sound you want to get. You can wind them just like passive pickups if that's the tone you are going for.

Yeah i meant that. Thanks for correcting.

But i read somewhere that they usually have less number of turns than the
passive.
So can you give the number of turns atleast for active pickups?

[David King]

Well for a "true" low impedance coil you'd only need 150-200 Ohms like a microphone has.
Something like 600-1200 Ohm is where the Alembic pickups are (AXY type) -I'm guessing.
EMG is probably in the 2.5K-4K range.

It's all going to depend on the circuit you want to drive which is going to depend on what parts you can get.

Oh yeah, turns for a J type 4 string pickups is going to be easy to figure out if you know what gauge wire you want to use and what the ohms per foot are you can just see how many turns per foot around your bobbin and do the math. No need to use 42 awg wire, you could use 30 AWG or whatever you have around.

[ubaid88]

Ok let us assume iam creating same type of pickup but with active method that is EMG one for electric guitar(not bass).
From here:-
http://europa.spaceports.com/~fishbake/buck/humbuck.htm
This guy used 43gauge wire with 5000 turns.
I will used 30gauge wire with 500 turn.

And i will use this wiring diagram.
http://www.seymourduncan.com/support...=1activehum_1v

Please correct my mistakes and errors. Also please suggest improvements

I don't want specific tone or quality. I just want an economical and easy way to create a pickup. You can suggest me one if you know. Iam justing expermenting, Iam not building this for any specific guitar. I will most probabably use this in my self created guitar, But if Iam successful in a pickup first. Because rest of things are in building a guitar are easy(other than neck, which is cheaply available in my area).

[ubaid88]

Thanks to you all. You are really helpfull.

[David King]

Also please suggest improvements

In the seymour duncan schematic there is a red wire for the battery + to connect to but there is no red wire in the first diagram...

You are missing a big piece of an active pickup: the preamplifier circuit.
It's going to need at the very least a transistor...

[ubaid88]

Yeah thats very complicated one

[David King]

You could use a low powered mic preamp schematic that uses a chip like the Texas Instruments INA217 but that's still a supply voltage problem...

limiting current consumption to .8 milliamps is always a challenge with pro-audio components but by using phantom power, you could come up with a really interesting pickup that could work with an amp or plug into a mixing console directly...

[ubaid88]

You mean, if found I a microphone with a small circuit and chips. I just have to remove the mouth piece and in place of that sold it with ends pickup coil. But many are low powered like they just use small 3V batteries or even they use small cells that they used in watches

[ubaid88]

http://www.bobblick.com/techref/proj...mp/preamp.html

Something like this

[David King]

That would work though the LM741 isn't exactly what i had in mind. The 082 is a lot better or even an LM442 if you want a cheap chip with low current drain. You basically need to take a low impedance input to drive a higher impedance input, pretty straight forward stuff at the 20Hz-20kHz rates we hear.